Flawd Report

Run at 2026-08-13T14:36:44Z · v0.9.0 · 4 containers · 17m 50s · ID: run-1786630733

Overview

Mutation Score
84.11%
Strong
Your tests effectively detect behavioral changes. Surviving mutants, if any, are worth reviewing for edge cases.
./middleware/logger.go has the most surviving mutants (10)—consider strengthening the tests covering that file.

Kill Reason Breakdown

0 compile errors 180 test failures
Total
217
Killed
180
Survived
34
Timeout
3
Error
0
Skipped
0
Pared
78%
Score based on 217 of 1001 possible mutants (78% pared). Higher budgets may reveal additional survivors at the cost of longer execution time.

Test Targeting

Strategy: Import Graph AnalysisStatically analyzes import/require statements to determine which test files depend on each source file. Mutants run only the tests that import (directly or transitively) the mutated file.
Mutant-to-test mapping: Partial — file-level dependency tracking
Insight level: Good — tests selected by static import analysis
Want deeper insight? Configure per-test coverage for complete mutant-to-test mapping — see exactly which tests detect (or miss) each mutation, and run only the relevant tests per mutant for faster feedback.

Distribution

Status

Operator

Test Effectiveness

Tests with lower scores are weaker and may benefit from strengthened assertions or additional coverage of edge cases.

Strengthen tests faster with AI: Run flawd handoff after a report to generate context-rich prompts for your coding agent (Claude Code, Cursor, Copilot, etc.). Use flawd handoff --install-skill to install a slash command that lets your agent automatically fix surviving mutants with better assertions and edge case handling.

14 tests analyzed, all above 50% kill rate

Test Sites Covered Killed Survived Score
./middleware/client_ip_example_test.go 217 183 34 84%
./middleware/realip_test.go 108 103 5 95%
./middleware/sunset_test.go 108 103 5 95%
./middleware/url_format_test.go 108 103 5 95%
./middleware/throttle_test.go 108 103 5 95%
./middleware/client_ip_test.go 108 103 5 95%
./middleware/compress_test.go 108 103 5 95%
./middleware/content_charset_test.go 108 103 5 95%
./middleware/recoverer_test.go 108 103 5 95%
./middleware/request_id_test.go 108 103 5 95%
./middleware/content_type_test.go 108 103 5 95%
./middleware/strip_test.go 108 103 5 95%
./middleware/get_head_test.go 108 103 5 95%
./middleware/content_encoding_test.go 108 103 5 95%

Survivor Clusters

Groups of 2+ surviving mutants in the same function and operator family — these concentrated clusters signal particularly weak spots that are more likely to harbor real bugs than isolated survivors.

Count File Function Family Lines
10 ./middleware/logger.go — logical 110, 117, 124, 142, 144, 146, 148, 157, 159, 174
5 ./middleware/wrap_writer.go — logical 31, 34, 39, 83, 84
3 ./middleware/recoverer.go — logical 126, 144, 193
2 ./middleware/clean_path.go — logical 17, 18
2 ./mux.go — logical 235, 338
2 ./tree.go — logical 478, 566

Mutant Results

Complete list of every mutant tested, with status, source file, operator, and diff. Use the filters below to drill into specific files, test files, or statuses.

Status:
Operator:
Family:
Language:
Source File:
Test File:
Status File Operator ID Runtime Diff
KilledSyntacticTargeted (14) ./chain.go boolean_negation mut-000081 4.58s
Show diff 
-len(middlewares) == 0
+!(len(middlewares) == 0)
Original
len(middlewares) == 0
Mutated
!(len(middlewares) == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./chain.go comparison_flip mut-000086 2.21s
Show diff 
->=
+>
Original
>=
Mutated
>
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./chain.go comparison_flip mut-000087 2.29s
Show diff 
->=
+<
Original
>=
Mutated
<
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./context.go boolean_negation mut-000091 4.91s
Show diff 
-rctx != nil
+!(rctx != nil)
Original
rctx != nil
Mutated
!(rctx != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
SurvivedSyntacticTargeted (14)Weak Assertion ./context.go return_value mut-000095 28.74s
Show diff 
-""
+"mutated"
Original
""
Mutated
"mutated"
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
Testing Gap
Tests do not distinguish `""` from `"mutated"` at ./context.go:14. Return value mutations show that tests check whether a function returns *something* but not the *exact* value
Suggested Fix
Assert the precise return value rather than just truthiness or presence
KilledSyntacticTargeted (14) ./context.go boolean_negation mut-000140 12.04s
Show diff 
-x.URLParams.Keys[k] == key
+!(x.URLParams.Keys[k] == key)
Original
x.URLParams.Keys[k] == key
Mutated
!(x.URLParams.Keys[k] == key)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./context.go boolean_negation mut-000148 32.72s
Show diff 
-x == nil
+!(x == nil)
Original
x == nil
Mutated
!(x == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./context.go boolean_negation mut-000155 29.36s
Show diff 
-routePattern != "/"
+!(routePattern != "/")
Original
routePattern != "/"
Mutated
!(routePattern != "/")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
TimeoutSyntacticTargeted (14) ./context.go boolean_negation mut-000160 62.18s
Show diff 
-strings.Contains(p, "/*/")
+!(strings.Contains(p, "/*/"))
Original
strings.Contains(p, "/*/")
Mutated
!(strings.Contains(p, "/*/"))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/clean_path.go boolean_negation mut-000175 32.17s
Show diff 
-routePath == ""
+!(routePath == "")
Original
routePath == ""
Mutated
!(routePath == "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `routePath == ""` from `!(routePath == "")` at ./middleware/clean_path.go:17. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/clean_path.go boolean_negation mut-000178 540ms
Show diff 
-r.URL.RawPath != ""
+!(r.URL.RawPath != "")
Original
r.URL.RawPath != ""
Mutated
!(r.URL.RawPath != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `r.URL.RawPath != ""` from `!(r.URL.RawPath != "")` at ./middleware/clean_path.go:18. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/client_ip.go comparison_flip mut-000186 1.66s
Show diff 
->
+>=
Original
>
Mutated
>=
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go comparison_flip mut-000187 747ms
Show diff 
->
+<=
Original
>
Mutated
<=
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go return_value mut-000208 745ms
Show diff 
-true
+false
Original
true
Mutated
false
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000211 765ms
Show diff 
-inAnyPrefix(ip, prefixes)
+!(inAnyPrefix(ip, prefixes))
Original
inAnyPrefix(ip, prefixes)
Mutated
!(inAnyPrefix(ip, prefixes))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go return_value mut-000214 1.15s
Show diff 
-false
+true
Original
false
Mutated
true
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000228 923ms
Show diff 
-found.IsValid()
+!(found.IsValid())
Original
found.IsValid()
Mutated
!(found.IsValid())
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go comparison_flip mut-000253 824ms
Show diff 
-<
+<=
Original
<
Mutated
<=
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go comparison_flip mut-000254 830ms
Show diff 
-<
+>=
Original
<
Mutated
>=
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000263 742ms
Show diff 
-n == 0
+!(n == 0)
Original
n == 0
Mutated
!(n == 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000286 799ms
Show diff 
-entry != ""
+!(entry != "")
Original
entry != ""
Mutated
!(entry != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000330 768ms
Show diff 
-err == nil
+!(err == nil)
Original
err == nil
Mutated
!(err == nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000355 782ms
Show diff 
-!ip.IsValid()
+ip.IsValid()
Original
!ip.IsValid()
Mutated
ip.IsValid()
Covering Tests 1
  • ./middleware/client_ip_example_test.go
TimeoutSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000375 62.11s
Show diff 
-h != ""
+!(h != "")
Original
h != ""
Mutated
!(h != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000378 737ms
Show diff 
-i >= 0
+!(i >= 0)
Original
i >= 0
Mutated
!(i >= 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000387 780ms
Show diff 
-v == ""
+!(v == "")
Original
v == ""
Mutated
!(v == "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000390 775ms
Show diff 
-visit(v)
+!(visit(v))
Original
visit(v)
Mutated
!(visit(v))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000392 749ms
Show diff 
-p.Contains(ip)
+!(p.Contains(ip))
Original
p.Contains(ip)
Mutated
!(p.Contains(ip))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000457 1.22s
Show diff 
-len(types) > 0
+!(len(types) > 0)
Original
len(types) > 0
Mutated
!(len(types) > 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000488 836ms
Show diff 
-strings.Contains(strings.TrimSuffix(t, "/*"), "*")
+!(strings.Contains(strings.TrimSuffix(t, "/*"), "*"))
Original
strings.Contains(strings.TrimSuffix(t, "/*"), "*")
Mutated
!(strings.Contains(strings.TrimSuffix(t, "/*"), "*"))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000497 842ms
Show diff 
-encoding == ""
+!(encoding == "")
Original
encoding == ""
Mutated
!(encoding == "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000520 755ms
Show diff 
-fn == nil
+!(fn == nil)
Original
fn == nil
Mutated
!(fn == nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000535 771ms
Show diff 
-v == encoding
+!(v == encoding)
Original
v == encoding
Mutated
!(v == encoding)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000047 915ms
Show diff 
-encoder != nil
+!(encoder != nil)
Original
encoder != nil
Mutated
!(encoder != nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000067 1.11s
Show diff 
-matchAcceptEncoding(accepted, name)
+!(matchAcceptEncoding(accepted, name))
Original
matchAcceptEncoding(accepted, name)
Mutated
!(matchAcceptEncoding(accepted, name))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000116 905ms
Show diff 
-strings.Contains(v, encoding)
+!(strings.Contains(v, encoding))
Original
strings.Contains(v, encoding)
Mutated
!(strings.Contains(v, encoding))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/compress.go boolean_negation mut-000151 26.88s
Show diff 
-hadSlash
+!(hadSlash)
Original
hadSlash
Mutated
!(hadSlash)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `hadSlash` from `!(hadSlash)` at ./middleware/compress.go:285. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000171 882ms
Show diff 
-cw.wroteHeader
+!(cw.wroteHeader)
Original
cw.wroteHeader
Mutated
!(cw.wroteHeader)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000190 954ms
Show diff 
-cw.Header().Get("Content-Encoding") != ""
+!(cw.Header().Get("Content-Encoding") != "")
Original
cw.Header().Get("Content-Encoding") != ""
Mutated
!(cw.Header().Get("Content-Encoding") != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000202 1.12s
Show diff 
-!cw.isCompressible()
+cw.isCompressible()
Original
!cw.isCompressible()
Mutated
cw.isCompressible()
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000213 1.15s
Show diff 
-cw.encoding != ""
+!(cw.encoding != "")
Original
cw.encoding != ""
Mutated
!(cw.encoding != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000247 1.07s
Show diff 
-!cw.wroteHeader
+cw.wroteHeader
Original
!cw.wroteHeader
Mutated
cw.wroteHeader
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/compress.go boolean_negation mut-000259 1.28s
Show diff 
-cw.compressible
+!(cw.compressible)
Original
cw.compressible
Mutated
!(cw.compressible)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/content_charset.go boolean_negation mut-000412 27.80s
Show diff 
-!contentEncoding(r.Header.Get("Content-Type"), charsets...)
+contentEncoding(r.Header.Get("Content-Type"), charsets...)
Original
!contentEncoding(r.Header.Get("Content-Type"), charsets...)
Mutated
contentEncoding(r.Header.Get("Content-Type"), charsets...)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/content_charset.go boolean_negation mut-000414 27.21s
Show diff 
-found
+!(found)
Original
found
Mutated
!(found)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/content_encoding.go boolean_negation mut-000415 27.57s
Show diff 
-r.ContentLength == 0
+!(r.ContentLength == 0)
Original
r.ContentLength == 0
Mutated
!(r.ContentLength == 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/get_head.go boolean_negation mut-000426 5.46s
Show diff 
-r.Method == "HEAD"
+!(r.Method == "HEAD")
Original
r.Method == "HEAD"
Mutated
!(r.Method == "HEAD")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/get_head.go boolean_negation mut-000434 2.60s
Show diff 
-!rctx.Routes.Match(tctx, "HEAD", routePath)
+rctx.Routes.Match(tctx, "HEAD", routePath)
Original
!rctx.Routes.Match(tctx, "HEAD", routePath)
Mutated
rctx.Routes.Match(tctx, "HEAD", routePath)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/heartbeat.go boolean_negation mut-000435 28.75s
Show diff 
-(r.Method == "GET" || r.Method == "HEAD") && strings.EqualFold(r.URL.Path, endpoint)
+!((r.Method == "GET" || r.Method == "HEAD") && strings.EqualFold(r.URL.Path, endpoint))
Original
(r.Method == "GET" || r.Method == "HEAD") && strings.EqualFold(r.URL.Path, endpoint)
Mutated
!((r.Method == "GET" || r.Method == "HEAD") && strings.EqualFold(r.URL.Path, endpoint))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `(r.Method == "GET" || r.Method == "HEAD") && strings.EqualFold(r.URL.Path, endpoint)` from `!((r.Method == "GET" || r.Method == "HEAD") && strings.EqualFold(r.URL.Path, endpoint))` at ./middleware/heartbeat.go:15. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000441 29.84s
Show diff 
-reqID != ""
+!(reqID != "")
Original
reqID != ""
Mutated
!(reqID != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `reqID != ""` from `!(reqID != "")` at ./middleware/logger.go:110. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000446 27.00s
Show diff 
-r.TLS != nil
+!(r.TLS != nil)
Original
r.TLS != nil
Mutated
!(r.TLS != nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `r.TLS != nil` from `!(r.TLS != nil)` at ./middleware/logger.go:117. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000471 26.95s
Show diff 
-clientIP == ""
+!(clientIP == "")
Original
clientIP == ""
Mutated
!(clientIP == "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `clientIP == ""` from `!(clientIP == "")` at ./middleware/logger.go:124. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000476 27.12s
Show diff 
-status < 200
+!(status < 200)
Original
status < 200
Mutated
!(status < 200)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `status < 200` from `!(status < 200)` at ./middleware/logger.go:142. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000487 27.87s
Show diff 
-status < 300
+!(status < 300)
Original
status < 300
Mutated
!(status < 300)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `status < 300` from `!(status < 300)` at ./middleware/logger.go:144. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000514 26.87s
Show diff 
-status < 400
+!(status < 400)
Original
status < 400
Mutated
!(status < 400)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `status < 400` from `!(status < 400)` at ./middleware/logger.go:146. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000521 27.20s
Show diff 
-status < 500
+!(status < 500)
Original
status < 500
Mutated
!(status < 500)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `status < 500` from `!(status < 500)` at ./middleware/logger.go:148. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000529 27.19s
Show diff 
-elapsed < 500*time.Millisecond
+!(elapsed < 500*time.Millisecond)
Original
elapsed < 500*time.Millisecond
Mutated
!(elapsed < 500*time.Millisecond)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `elapsed < 500*time.Millisecond` from `!(elapsed < 500*time.Millisecond)` at ./middleware/logger.go:157. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000554 27.18s
Show diff 
-elapsed < 5*time.Second
+!(elapsed < 5*time.Second)
Original
elapsed < 5*time.Second
Mutated
!(elapsed < 5*time.Second)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `elapsed < 5*time.Second` from `!(elapsed < 5*time.Second)` at ./middleware/logger.go:159. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/logger.go boolean_negation mut-000581 27.25s
Show diff 
-runtime.GOOS == "windows"
+!(runtime.GOOS == "windows")
Original
runtime.GOOS == "windows"
Mutated
!(runtime.GOOS == "windows")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `runtime.GOOS == "windows"` from `!(runtime.GOOS == "windows")` at ./middleware/logger.go:174. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/maybe.go boolean_negation mut-000590 27.50s
Show diff 
-maybeFn(r)
+!(maybeFn(r))
Original
maybeFn(r)
Mutated
!(maybeFn(r))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `maybeFn(r)` from `!(maybeFn(r))` at ./middleware/maybe.go:11. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/nocache.go boolean_negation mut-000555 27.97s
Show diff 
-r.Header.Get(v) != ""
+!(r.Header.Get(v) != "")
Original
r.Header.Get(v) != ""
Mutated
!(r.Header.Get(v) != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `r.Header.Get(v) != ""` from `!(r.Header.Get(v) != "")` at ./middleware/nocache.go:45. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/page_route.go boolean_negation mut-000557 1.27s
Show diff 
-r.Method == "GET" && strings.EqualFold(r.URL.Path, path)
+!(r.Method == "GET" && strings.EqualFold(r.URL.Path, path))
Original
r.Method == "GET" && strings.EqualFold(r.URL.Path, path)
Mutated
!(r.Method == "GET" && strings.EqualFold(r.URL.Path, path))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `r.Method == "GET" && strings.EqualFold(r.URL.Path, path)` from `!(r.Method == "GET" && strings.EqualFold(r.URL.Path, path))` at ./middleware/page_route.go:13. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/realip.go boolean_negation mut-000561 1.81s
Show diff 
-rip != ""
+!(rip != "")
Original
rip != ""
Mutated
!(rip != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/realip.go boolean_negation mut-000566 1.19s
Show diff 
-tcip != ""
+!(tcip != "")
Original
tcip != ""
Mutated
!(tcip != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/realip.go boolean_negation mut-000568 1.19s
Show diff 
-xrip != ""
+!(xrip != "")
Original
xrip != ""
Mutated
!(xrip != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/realip.go boolean_negation mut-000571 1.22s
Show diff 
-xff != ""
+!(xff != "")
Original
xff != ""
Mutated
!(xff != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/realip.go boolean_negation mut-000573 1.12s
Show diff 
-ip == "" || net.ParseIP(ip) == nil
+!(ip == "" || net.ParseIP(ip) == nil)
Original
ip == "" || net.ParseIP(ip) == nil
Mutated
!(ip == "" || net.ParseIP(ip) == nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000405 3.61s
Show diff 
-rvr != nil
+!(rvr != nil)
Original
rvr != nil
Mutated
!(rvr != nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000451 1.41s
Show diff 
-rvr == http.ErrAbortHandler
+!(rvr == http.ErrAbortHandler)
Original
rvr == http.ErrAbortHandler
Mutated
!(rvr == http.ErrAbortHandler)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000458 1.75s
Show diff 
-logEntry != nil
+!(logEntry != nil)
Original
logEntry != nil
Mutated
!(logEntry != nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000463 1.81s
Show diff 
-r.Header.Get("Connection") != "Upgrade"
+!(r.Header.Get("Connection") != "Upgrade")
Original
r.Header.Get("Connection") != "Upgrade"
Mutated
!(r.Header.Get("Connection") != "Upgrade")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000536 1.40s
Show diff 
-strings.HasPrefix(stack[i], "panic(")
+!(strings.HasPrefix(stack[i], "panic("))
Original
strings.HasPrefix(stack[i], "panic(")
Mutated
!(strings.HasPrefix(stack[i], "panic("))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000600 1.91s
Show diff 
-strings.HasPrefix(line, "\t") || strings.Contains(line, ".go:")
+!(strings.HasPrefix(line, "\t") || strings.Contains(line, ".go:"))
Original
strings.HasPrefix(line, "\t") || strings.Contains(line, ".go:")
Mutated
!(strings.HasPrefix(line, "\t") || strings.Contains(line, ".go:"))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000611 1.70s
Show diff 
-strings.HasSuffix(line, ")")
+!(strings.HasSuffix(line, ")"))
Original
strings.HasSuffix(line, ")")
Mutated
!(strings.HasSuffix(line, ")"))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/recoverer.go boolean_negation mut-000614 27.56s
Show diff 
-strings.HasPrefix(line, "\t")
+!(strings.HasPrefix(line, "\t"))
Original
strings.HasPrefix(line, "\t")
Mutated
!(strings.HasPrefix(line, "\t"))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `strings.HasPrefix(line, "\t")` from `!(strings.HasPrefix(line, "\t"))` at ./middleware/recoverer.go:126. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000630 905ms
Show diff 
-idx < 0
+!(idx < 0)
Original
idx < 0
Mutated
!(idx < 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/recoverer.go boolean_negation mut-000658 27.05s
Show diff 
-idx > 0
+!(idx > 0)
Original
idx > 0
Mutated
!(idx > 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `idx > 0` from `!(idx > 0)` at ./middleware/recoverer.go:144. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/recoverer.go boolean_negation mut-000697 847ms
Show diff 
-num == 0
+!(num == 0)
Original
num == 0
Mutated
!(num == 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/recoverer.go boolean_negation mut-000681 26.96s
Show diff 
-num == 1
+!(num == 1)
Original
num == 1
Mutated
!(num == 1)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `num == 1` from `!(num == 1)` at ./middleware/recoverer.go:193. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/request_id.go boolean_negation mut-000726 27.91s
Show diff 
-hostname == "" || err != nil
+!(hostname == "" || err != nil)
Original
hostname == "" || err != nil
Mutated
!(hostname == "" || err != nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `hostname == "" || err != nil` from `!(hostname == "" || err != nil)` at ./middleware/request_id.go:48. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/request_id.go boolean_negation mut-000732 1.17s
Show diff 
-len(b64) < 10
+!(len(b64) < 10)
Original
len(b64) < 10
Mutated
!(len(b64) < 10)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/request_id.go boolean_negation mut-000739 1.25s
Show diff 
-requestID == ""
+!(requestID == "")
Original
requestID == ""
Mutated
!(requestID == "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/request_id.go boolean_negation mut-000743 1.18s
Show diff 
-ctx == nil
+!(ctx == nil)
Original
ctx == nil
Mutated
!(ctx == nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/route_headers.go boolean_negation mut-000750 1.87s
Show diff 
-k == nil
+!(k == nil)
Original
k == nil
Mutated
!(k == nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/route_headers.go boolean_negation mut-000766 1.10s
Show diff 
-len(hr) == 0
+!(len(hr) == 0)
Original
len(hr) == 0
Mutated
!(len(hr) == 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/route_headers.go boolean_negation mut-000770 967ms
Show diff 
-headerValue == ""
+!(headerValue == "")
Original
headerValue == ""
Mutated
!(headerValue == "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/route_headers.go boolean_negation mut-000774 1.52s
Show diff 
-matcher.IsMatch(headerValue)
+!(matcher.IsMatch(headerValue))
Original
matcher.IsMatch(headerValue)
Mutated
!(matcher.IsMatch(headerValue))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/route_headers.go boolean_negation mut-000791 1.31s
Show diff 
-len(r.MatchAny) > 0
+!(len(r.MatchAny) > 0)
Original
len(r.MatchAny) > 0
Mutated
!(len(r.MatchAny) > 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/route_headers.go boolean_negation mut-000797 27.34s
Show diff 
-m.Match(value)
+!(m.Match(value))
Original
m.Match(value)
Mutated
!(m.Match(value))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `m.Match(value)` from `!(m.Match(value))` at ./middleware/route_headers.go:119. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/route_headers.go boolean_negation mut-000800 942ms
Show diff 
-r.MatchOne.Match(value)
+!(r.MatchOne.Match(value))
Original
r.MatchOne.Match(value)
Mutated
!(r.MatchOne.Match(value))
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/route_headers.go boolean_negation mut-000809 1.04s
Show diff 
-!p.wildcard
+p.wildcard
Original
!p.wildcard
Mutated
p.wildcard
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/strip.go boolean_negation mut-000021 1.92s
Show diff 
-rctx != nil && rctx.RoutePath != ""
+!(rctx != nil && rctx.RoutePath != "")
Original
rctx != nil && rctx.RoutePath != ""
Mutated
!(rctx != nil && rctx.RoutePath != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/strip.go boolean_negation mut-000041 1.34s
Show diff 
-len(path) > 1 && path[len(path)-1] == '/'
+!(len(path) > 1 && path[len(path)-1] == '/')
Original
len(path) > 1 && path[len(path)-1] == '/'
Mutated
!(len(path) > 1 && path[len(path)-1] == '/')
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/strip.go boolean_negation mut-000069 1.28s
Show diff 
-rctx == nil
+!(rctx == nil)
Original
rctx == nil
Mutated
!(rctx == nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/strip.go boolean_negation mut-000109 1.25s
Show diff 
-r.URL.RawQuery != ""
+!(r.URL.RawQuery != "")
Original
r.URL.RawQuery != ""
Mutated
!(r.URL.RawQuery != "")
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/sunset.go boolean_negation mut-000126 2.33s
Show diff 
-!sunsetAt.IsZero()
+sunsetAt.IsZero()
Original
!sunsetAt.IsZero()
Mutated
sunsetAt.IsZero()
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/supress_notfound.go boolean_negation mut-000127 28.02s
Show diff 
-!match
+match
Original
!match
Mutated
match
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `!match` from `match` at ./middleware/supress_notfound.go:20. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/terminal.go boolean_negation mut-000154 1.29s
Show diff 
-IsTTY && useColor
+!(IsTTY && useColor)
Original
IsTTY && useColor
Mutated
!(IsTTY && useColor)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/throttle.go boolean_negation mut-000168 2.94s
Show diff 
-opts.Limit < 1
+!(opts.Limit < 1)
Original
opts.Limit < 1
Mutated
!(opts.Limit < 1)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/throttle.go boolean_negation mut-000185 1.83s
Show diff 
-opts.BacklogLimit < 0
+!(opts.BacklogLimit < 0)
Original
opts.BacklogLimit < 0
Mutated
!(opts.BacklogLimit < 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/throttle.go boolean_negation mut-000210 21.56s
Show diff 
-statusCode == 0
+!(statusCode == 0)
Original
statusCode == 0
Mutated
!(statusCode == 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
TimeoutSyntacticTargeted (1) ./middleware/throttle.go boolean_negation mut-000230 62.05s
Show diff 
-i < opts.Limit
+!(i < opts.Limit)
Original
i < opts.Limit
Mutated
!(i < opts.Limit)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/throttle.go boolean_negation mut-000243 19.93s
Show diff 
-t.retryAfterFn == nil
+!(t.retryAfterFn == nil)
Original
t.retryAfterFn == nil
Mutated
!(t.retryAfterFn == nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/timeout.go boolean_negation mut-000248 27.97s
Show diff 
-ctx.Err() == context.DeadlineExceeded
+!(ctx.Err() == context.DeadlineExceeded)
Original
ctx.Err() == context.DeadlineExceeded
Mutated
!(ctx.Err() == context.DeadlineExceeded)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `ctx.Err() == context.DeadlineExceeded` from `!(ctx.Err() == context.DeadlineExceeded)` at ./middleware/timeout.go:38. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/url_format.go boolean_negation mut-000284 28.57s
Show diff 
-strings.Index(path, ".") > 0
+!(strings.Index(path, ".") > 0)
Original
strings.Index(path, ".") > 0
Mutated
!(strings.Index(path, ".") > 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/wrap_writer.go boolean_negation mut-000303 2.24s
Show diff 
-protoMajor == 2
+!(protoMajor == 2)
Original
protoMajor == 2
Mutated
!(protoMajor == 2)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/wrap_writer.go boolean_negation mut-000311 1.20s
Show diff 
-fl && ps
+!(fl && ps)
Original
fl && ps
Mutated
!(fl && ps)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/wrap_writer.go boolean_negation mut-000318 1.05s
Show diff 
-fl && hj && rf
+!(fl && hj && rf)
Original
fl && hj && rf
Mutated
!(fl && hj && rf)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/wrap_writer.go boolean_negation mut-000326 27.01s
Show diff 
-fl && hj
+!(fl && hj)
Original
fl && hj
Mutated
!(fl && hj)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `fl && hj` from `!(fl && hj)` at ./middleware/wrap_writer.go:31. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/wrap_writer.go boolean_negation mut-000331 27.10s
Show diff 
-hj
+!(hj)
Original
hj
Mutated
!(hj)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `hj` from `!(hj)` at ./middleware/wrap_writer.go:34. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/wrap_writer.go boolean_negation mut-000332 27.26s
Show diff 
-fl
+!(fl)
Original
fl
Mutated
!(fl)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `fl` from `!(fl)` at ./middleware/wrap_writer.go:39. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/wrap_writer.go boolean_negation mut-000335 27.23s
Show diff 
-code >= 100 && code <= 199 && code != http.StatusSwitchingProtocols
+!(code >= 100 && code <= 199 && code != http.StatusSwitchingProtocols)
Original
code >= 100 && code <= 199 && code != http.StatusSwitchingProtocols
Mutated
!(code >= 100 && code <= 199 && code != http.StatusSwitchingProtocols)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `code >= 100 && code <= 199 && code != http.StatusSwitchingProtocols` from `!(code >= 100 && code <= 199 && code != http.StatusSwitchingProtocols)` at ./middleware/wrap_writer.go:83. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
SurvivedSyntacticTargeted (1)Weak AssertionMedium Risk ./middleware/wrap_writer.go boolean_negation mut-000368 27.13s
Show diff 
-!b.discard
+b.discard
Original
!b.discard
Mutated
b.discard
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Testing Gap
Tests do not distinguish `!b.discard` from `b.discard` at ./middleware/wrap_writer.go:84. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (1) ./middleware/wrap_writer.go boolean_negation mut-000372 828ms
Show diff 
-!b.wroteHeader
+b.wroteHeader
Original
!b.wroteHeader
Mutated
b.wroteHeader
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/wrap_writer.go boolean_negation mut-000421 758ms
Show diff 
-b.tee != nil
+!(b.tee != nil)
Original
b.tee != nil
Mutated
!(b.tee != nil)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/wrap_writer.go boolean_negation mut-000485 26.98s
Show diff 
-f.basicWriter.tee != nil || f.basicWriter.discard
+!(f.basicWriter.tee != nil || f.basicWriter.discard)
Original
f.basicWriter.tee != nil || f.basicWriter.discard
Mutated
!(f.basicWriter.tee != nil || f.basicWriter.discard)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000516 1.95s
Show diff 
-mx.handler == nil
+!(mx.handler == nil)
Original
mx.handler == nil
Mutated
!(mx.handler == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000000 1.07s
Show diff 
-mx.handler != nil
+!(mx.handler != nil)
Original
mx.handler != nil
Mutated
!(mx.handler != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000147 1.23s
Show diff 
-mx.inline && mx.parent != nil
+!(mx.inline && mx.parent != nil)
Original
mx.inline && mx.parent != nil
Mutated
!(mx.inline && mx.parent != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000209 27.20s
Show diff 
-subMux.notFoundHandler == nil
+!(subMux.notFoundHandler == nil)
Original
subMux.notFoundHandler == nil
Mutated
!(subMux.notFoundHandler == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
SurvivedSyntacticTargeted (14)Weak AssertionMedium Risk ./mux.go boolean_negation mut-000269 27.25s
Show diff 
-subMux.methodNotAllowedHandler == nil
+!(subMux.methodNotAllowedHandler == nil)
Original
subMux.methodNotAllowedHandler == nil
Mutated
!(subMux.methodNotAllowedHandler == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
Testing Gap
Tests do not distinguish `subMux.methodNotAllowedHandler == nil` from `!(subMux.methodNotAllowedHandler == nil)` at ./mux.go:235. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000325 29.34s
Show diff 
-mx.inline
+!(mx.inline)
Original
mx.inline
Mutated
!(mx.inline)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000344 29.20s
Show diff 
-fn != nil
+!(fn != nil)
Original
fn != nil
Mutated
!(fn != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000388 6.44s
Show diff 
-handler == nil
+!(handler == nil)
Original
handler == nil
Mutated
!(handler == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000404 6.29s
Show diff 
-mx.tree.findPattern(pattern+"*") || mx.tree.findPattern(pattern+"/*")
+!(mx.tree.findPattern(pattern+"*") || mx.tree.findPattern(pattern+"/*"))
Original
mx.tree.findPattern(pattern+"*") || mx.tree.findPattern(pattern+"/*")
Mutated
!(mx.tree.findPattern(pattern+"*") || mx.tree.findPattern(pattern+"/*"))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000409 30.15s
Show diff 
-ok && subr.notFoundHandler == nil && mx.notFoundHandler != nil
+!(ok && subr.notFoundHandler == nil && mx.notFoundHandler != nil)
Original
ok && subr.notFoundHandler == nil && mx.notFoundHandler != nil
Mutated
!(ok && subr.notFoundHandler == nil && mx.notFoundHandler != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000504 29.37s
Show diff 
-ok && subr.methodNotAllowedHandler == nil && mx.methodNotAllowedHandler != nil
+!(ok && subr.methodNotAllowedHandler == nil && mx.methodNotAllowedHandler != nil)
Original
ok && subr.methodNotAllowedHandler == nil && mx.methodNotAllowedHandler != nil
Mutated
!(ok && subr.methodNotAllowedHandler == nil && mx.methodNotAllowedHandler != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000587 5.71s
Show diff 
-n >= 0 && rctx.URLParams.Keys[n] == "*" && len(rctx.URLParams.Values) > n
+!(n >= 0 && rctx.URLParams.Keys[n] == "*" && len(rctx.URLParams.Values) > n)
Original
n >= 0 && rctx.URLParams.Keys[n] == "*" && len(rctx.URLParams.Values) > n
Mutated
!(n >= 0 && rctx.URLParams.Keys[n] == "*" && len(rctx.URLParams.Values) > n)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000553 5.39s
Show diff 
-pattern == "" || pattern[len(pattern)-1] != '/'
+!(pattern == "" || pattern[len(pattern)-1] != '/')
Original
pattern == "" || pattern[len(pattern)-1] != '/'
Mutated
!(pattern == "" || pattern[len(pattern)-1] != '/')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
SurvivedSyntacticTargeted (14)Weak AssertionMedium Risk ./mux.go boolean_negation mut-000634 29.33s
Show diff 
-subroutes != nil
+!(subroutes != nil)
Original
subroutes != nil
Mutated
!(subroutes != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
Testing Gap
Tests do not distinguish `subroutes != nil` from `!(subroutes != nil)` at ./mux.go:338. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000004 7.67s
Show diff 
-node != nil
+!(node != nil)
Original
node != nil
Mutated
!(node != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000040 10.76s
Show diff 
-node.subroutes == nil
+!(node.subroutes == nil)
Original
node.subroutes == nil
Mutated
!(node.subroutes == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000072 6.84s
Show diff 
-subPattern == ""
+!(subPattern == "")
Original
subPattern == ""
Mutated
!(subPattern == "")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000134 5.41s
Show diff 
-mx.notFoundHandler != nil
+!(mx.notFoundHandler != nil)
Original
mx.notFoundHandler != nil
Mutated
!(mx.notFoundHandler != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000152 29.21s
Show diff 
-mx.methodNotAllowedHandler != nil
+!(mx.methodNotAllowedHandler != nil)
Original
mx.methodNotAllowedHandler != nil
Mutated
!(mx.methodNotAllowedHandler != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000182 5.38s
Show diff 
-len(pattern) == 0 || pattern[0] != '/'
+!(len(pattern) == 0 || pattern[0] != '/')
Original
len(pattern) == 0 || pattern[0] != '/'
Mutated
!(len(pattern) == 0 || pattern[0] != '/')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000353 5.49s
Show diff 
-rctx.RouteMethod == ""
+!(rctx.RouteMethod == "")
Original
rctx.RouteMethod == ""
Mutated
!(rctx.RouteMethod == "")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000386 5.46s
Show diff 
-h != nil
+!(h != nil)
Original
h != nil
Mutated
!(h != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000009 5.50s
Show diff 
-rctx.methodNotAllowed
+!(rctx.methodNotAllowed)
Original
rctx.methodNotAllowed
Mutated
!(rctx.methodNotAllowed)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./mux.go boolean_negation mut-000050 5.41s
Show diff 
-nx >= 0 && rctx.routeParams.Keys[nx] == "*" && len(rctx.routeParams.Values) > nx
+!(nx >= 0 && rctx.routeParams.Keys[nx] == "*" && len(rctx.routeParams.Values) > nx)
Original
nx >= 0 && rctx.routeParams.Keys[nx] == "*" && len(rctx.routeParams.Values) > nx
Mutated
!(nx >= 0 && rctx.routeParams.Keys[nx] == "*" && len(rctx.routeParams.Values) > nx)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000235 396ms
Show diff 
-method == ""
+!(method == "")
Original
method == ""
Mutated
!(method == "")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000283 390ms
Show diff 
-n > strconv.IntSize-2
+!(n > strconv.IntSize-2)
Original
n > strconv.IntSize-2
Mutated
!(n > strconv.IntSize-2)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000397 388ms
Show diff 
-len(search) == 0
+!(len(search) == 0)
Original
len(search) == 0
Mutated
!(len(search) == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000469 414ms
Show diff 
-label == '{' || label == '*'
+!(label == '{' || label == '*')
Original
label == '{' || label == '*'
Mutated
!(label == '{' || label == '*')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000552 394ms
Show diff 
-segTyp == ntRegexp
+!(segTyp == ntRegexp)
Original
segTyp == ntRegexp
Mutated
!(segTyp == ntRegexp)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000606 429ms
Show diff 
-n == nil
+!(n == nil)
Original
n == nil
Mutated
!(n == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000007 384ms
Show diff 
-n.typ > ntStatic
+!(n.typ > ntStatic)
Original
n.typ > ntStatic
Mutated
!(n.typ > ntStatic)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000107 331ms
Show diff 
-commonPrefix == len(n.prefix)
+!(commonPrefix == len(n.prefix))
Original
commonPrefix == len(n.prefix)
Mutated
!(commonPrefix == len(n.prefix))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000373 326ms
Show diff 
-segStartIdx == 0
+!(segStartIdx == 0)
Original
segStartIdx == 0
Mutated
!(segStartIdx == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000406 323ms
Show diff 
-segTyp == ntCatchAll
+!(segTyp == ntCatchAll)
Original
segTyp == ntCatchAll
Mutated
!(segTyp == ntCatchAll)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000491 334ms
Show diff 
-segStartIdx < 0
+!(segStartIdx < 0)
Original
segStartIdx < 0
Mutated
!(segStartIdx < 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000548 401ms
Show diff 
-segStartIdx != len(search)
+!(segStartIdx != len(search))
Original
segStartIdx != len(search)
Mutated
!(segStartIdx != len(search))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000616 310ms
Show diff 
-segStartIdx > 0
+!(segStartIdx > 0)
Original
segStartIdx > 0
Mutated
!(segStartIdx > 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000707 404ms
Show diff 
-n.children[child.typ][i].label == label && n.children[child.typ][i].tail == tail
+!(n.children[child.typ][i].label == label && n.children[child.typ][i].tail == tail)
Original
n.children[child.typ][i].label == label && n.children[child.typ][i].tail == tail
Mutated
!(n.children[child.typ][i].label == label && n.children[child.typ][i].tail == tail)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000699 305ms
Show diff 
-nds[i].label == label && nds[i].tail == tail
+!(nds[i].label == label && nds[i].tail == tail)
Original
nds[i].label == label && nds[i].tail == tail
Mutated
!(nds[i].label == label && nds[i].tail == tail)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000752 396ms
Show diff 
-ntyp == ntRegexp && nds[i].prefix != prefix
+!(ntyp == ntRegexp && nds[i].prefix != prefix)
Original
ntyp == ntRegexp && nds[i].prefix != prefix
Mutated
!(ntyp == ntRegexp && nds[i].prefix != prefix)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000689 303ms
Show diff 
-n.endpoints == nil
+!(n.endpoints == nil)
Original
n.endpoints == nil
Mutated
!(n.endpoints == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000702 335ms
Show diff 
-method&mSTUB == mSTUB
+!(method&mSTUB == mSTUB)
Original
method&mSTUB == mSTUB
Mutated
!(method&mSTUB == mSTUB)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000718 323ms
Show diff 
-method&mALL == mALL
+!(method&mALL == mALL)
Original
method&mALL == mALL
Mutated
!(method&mALL == mALL)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000756 327ms
Show diff 
-rn == nil
+!(rn == nil)
Original
rn == nil
Mutated
!(rn == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000787 358ms
Show diff 
-rn.endpoints[method].pattern != ""
+!(rn.endpoints[method].pattern != "")
Original
rn.endpoints[method].pattern != ""
Mutated
!(rn.endpoints[method].pattern != "")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000807 314ms
Show diff 
-len(nds) == 0
+!(len(nds) == 0)
Original
len(nds) == 0
Mutated
!(len(nds) == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000834 339ms
Show diff 
-search != ""
+!(search != "")
Original
search != ""
Mutated
!(search != "")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000861 403ms
Show diff 
-xn == nil || !strings.HasPrefix(xsearch, xn.prefix)
+!(xn == nil || !strings.HasPrefix(xsearch, xn.prefix))
Original
xn == nil || !strings.HasPrefix(xsearch, xn.prefix)
Mutated
!(xn == nil || !strings.HasPrefix(xsearch, xn.prefix))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000827 406ms
Show diff 
-xsearch == ""
+!(xsearch == "")
Original
xsearch == ""
Mutated
!(xsearch == "")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000833 389ms
Show diff 
-p < 0
+!(p < 0)
Original
p < 0
Mutated
!(p < 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000826 367ms
Show diff 
-xn.tail == '/'
+!(xn.tail == '/')
Original
xn.tail == '/'
Mutated
!(xn.tail == '/')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000835 378ms
Show diff 
-ntyp == ntRegexp && p == 0
+!(ntyp == ntRegexp && p == 0)
Original
ntyp == ntRegexp && p == 0
Mutated
!(ntyp == ntRegexp && p == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000864 467ms
Show diff 
-ntyp == ntRegexp && xn.rex != nil
+!(ntyp == ntRegexp && xn.rex != nil)
Original
ntyp == ntRegexp && xn.rex != nil
Mutated
!(ntyp == ntRegexp && xn.rex != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000670 392ms
Show diff 
-!xn.rex.MatchString(xsearch[:p])
+xn.rex.MatchString(xsearch[:p])
Original
!xn.rex.MatchString(xsearch[:p])
Mutated
xn.rex.MatchString(xsearch[:p])
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000686 417ms
Show diff 
-strings.IndexByte(xsearch[:p], '/') != -1
+!(strings.IndexByte(xsearch[:p], '/') != -1)
Original
strings.IndexByte(xsearch[:p], '/') != -1
Mutated
!(strings.IndexByte(xsearch[:p], '/') != -1)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000709 287ms
Show diff 
-len(xsearch) == 0
+!(len(xsearch) == 0)
Original
len(xsearch) == 0
Mutated
!(len(xsearch) == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000776 302ms
Show diff 
-xn.isLeaf()
+!(xn.isLeaf())
Original
xn.isLeaf()
Mutated
!(xn.isLeaf())
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000790 296ms
Show diff 
-h != nil && h.handler != nil
+!(h != nil && h.handler != nil)
Original
h != nil && h.handler != nil
Mutated
!(h != nil && h.handler != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
SurvivedSyntacticTargeted (14)Weak AssertionMedium Risk ./tree.go boolean_negation mut-000842 329ms
Show diff 
-endpoints == mALL || endpoints == mSTUB
+!(endpoints == mALL || endpoints == mSTUB)
Original
endpoints == mALL || endpoints == mSTUB
Mutated
!(endpoints == mALL || endpoints == mSTUB)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
Testing Gap
Tests do not distinguish `endpoints == mALL || endpoints == mSTUB` from `!(endpoints == mALL || endpoints == mSTUB)` at ./tree.go:478. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000855 324ms
Show diff 
-fin != nil
+!(fin != nil)
Original
fin != nil
Mutated
!(fin != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000755 242ms
Show diff 
-xn == nil
+!(xn == nil)
Original
xn == nil
Mutated
!(xn == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000698 360ms
Show diff 
-xn.typ > ntStatic
+!(xn.typ > ntStatic)
Original
xn.typ > ntStatic
Mutated
!(xn.typ > ntStatic)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000735 221ms
Show diff 
-len(rctx.routeParams.Values) > 0
+!(len(rctx.routeParams.Values) > 0)
Original
len(rctx.routeParams.Values) > 0
Mutated
!(len(rctx.routeParams.Values) > 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000845 233ms
Show diff 
-i <= j
+!(i <= j)
Original
i <= j
Mutated
!(i <= j)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000875 306ms
Show diff 
-label > nds[idx].label
+!(label > nds[idx].label)
Original
label > nds[idx].label
Mutated
!(label > nds[idx].label)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
SurvivedSyntacticTargeted (14)Weak AssertionMedium Risk ./tree.go boolean_negation mut-000848 274ms
Show diff 
-label < nds[idx].label
+!(label < nds[idx].label)
Original
label < nds[idx].label
Mutated
!(label < nds[idx].label)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
Testing Gap
Tests do not distinguish `label < nds[idx].label` from `!(label < nds[idx].label)` at ./tree.go:566. Boolean negation mutations show that tests do not exercise both branches of a conditional, leaving one path untested
Suggested Fix
Add a test that exercises the negated branch, ensuring both true and false paths produce distinct, verified outcomes
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000885 355ms
Show diff 
-nds[idx].label != label
+!(nds[idx].label != label)
Original
nds[idx].label != label
Mutated
!(nds[idx].label != label)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000895 295ms
Show diff 
-idx < len(n.prefix)
+!(idx < len(n.prefix))
Original
idx < len(n.prefix)
Mutated
!(idx < len(n.prefix))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000720 221ms
Show diff 
-len(xpattern) == 0
+!(len(xpattern) == 0)
Original
len(xpattern) == 0
Mutated
!(len(xpattern) == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000814 284ms
Show diff 
-eps[mSTUB] != nil && eps[mSTUB].handler != nil && subroutes == nil
+!(eps[mSTUB] != nil && eps[mSTUB].handler != nil && subroutes == nil)
Original
eps[mSTUB] != nil && eps[mSTUB].handler != nil && subroutes == nil
Mutated
!(eps[mSTUB] != nil && eps[mSTUB].handler != nil && subroutes == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000882 249ms
Show diff 
-h.pattern == ""
+!(h.pattern == "")
Original
h.pattern == ""
Mutated
!(h.pattern == "")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000896 380ms
Show diff 
-mh[mALL] != nil && mh[mALL].handler != nil
+!(mh[mALL] != nil && mh[mALL].handler != nil)
Original
mh[mALL] != nil && mh[mALL].handler != nil
Mutated
!(mh[mALL] != nil && mh[mALL].handler != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000913 222ms
Show diff 
-h.handler == nil
+!(h.handler == nil)
Original
h.handler == nil
Mutated
!(h.handler == nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000906 278ms
Show diff 
-(n.endpoints != nil || n.subroutes != nil) && fn(n.endpoints, n.subroutes)
+!((n.endpoints != nil || n.subroutes != nil) && fn(n.endpoints, n.subroutes))
Original
(n.endpoints != nil || n.subroutes != nil) && fn(n.endpoints, n.subroutes)
Mutated
!((n.endpoints != nil || n.subroutes != nil) && fn(n.endpoints, n.subroutes))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000932 208ms
Show diff 
-cn.walk(fn)
+!(cn.walk(fn))
Original
cn.walk(fn)
Mutated
!(cn.walk(fn))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000893 289ms
Show diff 
-ps < 0 && ws < 0
+!(ps < 0 && ws < 0)
Original
ps < 0 && ws < 0
Mutated
!(ps < 0 && ws < 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go return_value mut-000937 240ms
Show diff 
-0
+-1
Original
0
Mutated
-1
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000963 291ms
Show diff 
-ps >= 0 && ws >= 0 && ws < ps
+!(ps >= 0 && ws >= 0 && ws < ps)
Original
ps >= 0 && ws >= 0 && ws < ps
Mutated
!(ps >= 0 && ws >= 0 && ws < ps)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000891 276ms
Show diff 
-ps >= 0
+!(ps >= 0)
Original
ps >= 0
Mutated
!(ps >= 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000924 290ms
Show diff 
-c == '{'
+!(c == '{')
Original
c == '{'
Mutated
!(c == '{')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000936 253ms
Show diff 
-c == '}'
+!(c == '}')
Original
c == '}'
Mutated
!(c == '}')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000945 337ms
Show diff 
-cc == 0
+!(cc == 0)
Original
cc == 0
Mutated
!(cc == 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000926 291ms
Show diff 
-pe == ps
+!(pe == ps)
Original
pe == ps
Mutated
!(pe == ps)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000960 455ms
Show diff 
-pe < len(pattern)
+!(pe < len(pattern))
Original
pe < len(pattern)
Mutated
!(pe < len(pattern))
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000939 359ms
Show diff 
-isRegexp
+!(isRegexp)
Original
isRegexp
Mutated
!(isRegexp)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000943 407ms
Show diff 
-len(rexpat) > 0
+!(len(rexpat) > 0)
Original
len(rexpat) > 0
Mutated
!(len(rexpat) > 0)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000972 380ms
Show diff 
-rexpat[0] != '^'
+!(rexpat[0] != '^')
Original
rexpat[0] != '^'
Mutated
!(rexpat[0] != '^')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000872 381ms
Show diff 
-rexpat[len(rexpat)-1] != '$'
+!(rexpat[len(rexpat)-1] != '$')
Original
rexpat[len(rexpat)-1] != '$'
Mutated
!(rexpat[len(rexpat)-1] != '$')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000894 400ms
Show diff 
-ws < len(pattern)-1
+!(ws < len(pattern)-1)
Original
ws < len(pattern)-1
Mutated
!(ws < len(pattern)-1)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go return_value mut-000931 376ms
Show diff 
-"*"
+""
Original
"*"
Mutated
""
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000962 447ms
Show diff 
-ptyp == ntStatic
+!(ptyp == ntStatic)
Original
ptyp == ntStatic
Mutated
!(ptyp == ntStatic)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000994 396ms
Show diff 
-paramKeys[i] == paramKey
+!(paramKeys[i] == paramKey)
Original
paramKeys[i] == paramKey
Mutated
!(paramKeys[i] == paramKey)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-001019 338ms
Show diff 
-k1[i] != k2[i]
+!(k1[i] != k2[i])
Original
k1[i] != k2[i]
Mutated
!(k1[i] != k2[i])
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-001011 409ms
Show diff 
-ns[i].typ > ntStatic && ns[i].tail == '/'
+!(ns[i].typ > ntStatic && ns[i].tail == '/')
Original
ns[i].typ > ntStatic && ns[i].tail == '/'
Mutated
!(ns[i].typ > ntStatic && ns[i].tail == '/')
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000944 296ms
Show diff 
-label > ns[idx].label
+!(label > ns[idx].label)
Original
label > ns[idx].label
Mutated
!(label > ns[idx].label)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000976 352ms
Show diff 
-label < ns[idx].label
+!(label < ns[idx].label)
Original
label < ns[idx].label
Mutated
!(label < ns[idx].label)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000998 383ms
Show diff 
-ns[idx].label != label
+!(ns[idx].label != label)
Original
ns[idx].label != label
Mutated
!(ns[idx].label != label)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-000992 384ms
Show diff 
-route.SubRoutes != nil
+!(route.SubRoutes != nil)
Original
route.SubRoutes != nil
Mutated
!(route.SubRoutes != nil)
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (14) ./tree.go boolean_negation mut-001006 449ms
Show diff 
-method == "*"
+!(method == "*")
Original
method == "*"
Mutated
!(method == "*")
Covering Tests 14
  • ./middleware/strip_test.go
  • ./middleware/get_head_test.go
  • ./middleware/throttle_test.go
  • ./middleware/client_ip_test.go
  • ./middleware/content_type_test.go
  • ./middleware/recoverer_test.go
  • ./middleware/compress_test.go
  • ./middleware/content_charset_test.go
  • ./middleware/sunset_test.go
  • ./middleware/request_id_test.go
...and 4 more
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000181 1.29s
Show diff 
-len(values) > 0
+!(len(values) > 0)
Original
len(values) > 0
Mutated
!(len(values) > 0)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
KilledSyntacticTargeted (1) ./middleware/client_ip.go boolean_negation mut-000244 1.65s
Show diff 
-numTrustedProxies < 1
+!(numTrustedProxies < 1)
Original
numTrustedProxies < 1
Mutated
!(numTrustedProxies < 1)
Covering Tests 1
  • ./middleware/client_ip_example_test.go
Per page: