go-git-gitignore: add pattern_test.go

Version https://github.com/go-git/go-git/commit/d767b7256ade17d20467bea377af4045b9cd8015

4 files changed, 321 insertions, 1 deletions

diff --git a/go.mod b/go.mod
index e79fae0..6744057 100644
--- a/go.mod
+++ b/go.mod
@@ -13,3 +13,10 @@ require (
 	golang.org/x/sys v0.30.0
 	golang.org/x/term v0.29.0
 )
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.10.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/go.sum b/go.sum
index 03257b7..392e522 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 github.com/aperturerobotics/jacobsa-crypto v1.1.0 h1:0hig54FMzU80OHrqSfqmj/W8HydRymVdz2K6D9Guffs=
 github.com/aperturerobotics/jacobsa-crypto v1.1.0/go.mod h1:buWU1iY+FjIcfpb1aYfFJZfl07WlS7O30lTyC2iwjv8=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/hanwen/go-fuse/v2 v2.7.3-0.20250306214706-e3463465126a h1:Q+A/Qcj02oRubB/7+18SGNxAG/GtnoXxf0UKRJ2/ZE4=
 github.com/hanwen/go-fuse/v2 v2.7.3-0.20250306214706-e3463465126a/go.mod h1:yE6D2PqWwm3CbYRxFXV9xUd8Md5d6NG0WBs5spCswmI=
 github.com/jacobsa/oglematchers v0.0.0-20150720000706-141901ea67cd h1:9GCSedGjMcLZCrusBZuo4tyKLpKUPenUUqi34AkuFmA=
@@ -11,10 +13,14 @@ github.com/moby/sys/mountinfo v0.7.2 h1:1shs6aH5s4o5H2zQLn796ADW1wMrIwHsyJ2v9Kou
 github.com/moby/sys/mountinfo v0.7.2/go.mod h1:1YOa8w8Ih7uW0wALDUgT1dTTSBrZ+HiBLGws92L2RU4=
 github.com/pkg/xattr v0.4.9 h1:5883YPCtkSd8LFbs13nXplj9g9tlrwoJRjgpgMu1/fE=
 github.com/pkg/xattr v0.4.9/go.mod h1:di8WF84zAKk8jzR1UBTEWh9AUlIZZ7M/JNt8e9B6ktU=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/rfjakob/eme v1.1.2 h1:SxziR8msSOElPayZNFfQw4Tjx/Sbaeeh3eRvrHVMUs4=
 github.com/rfjakob/eme v1.1.2/go.mod h1:cVvpasglm/G3ngEfcfT/Wt0GwhkuO32pf/poW6Nyk1k=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
 golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
 golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/net v0.21.0 h1:AQyQV4dYCvJ7vGmJyKki9+PBdyvhkSd8EIx/qb0AYv4=
@@ -23,3 +29,6 @@ golang.org/x/sys v0.30.0 h1:QjkSwP/36a20jFYWkSue1YwXzLmsV5Gfq7Eiy72C1uc=
 golang.org/x/sys v0.30.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.29.0 h1:L6pJp37ocefwRRtYPKSWOWzOtWSxVajvz2ldH/xi3iU=
 golang.org/x/term v0.29.0/go.mod h1:6bl4lRlvVuDgSf3179VpIxBF0o10JUpXWOnI7nErv7s=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
diff --git a/internal/go-git-gitignore/README.md b/internal/go-git-gitignore/README.md
index fff42bf..92357a2 100644
--- a/internal/go-git-gitignore/README.md
+++ b/internal/go-git-gitignore/README.md
@@ -5,5 +5,6 @@ using the commands below:
 ```
 curl --remote-name-all https://raw.githubusercontent.com/go-git/go-git/refs/heads/main/LICENSE \
  https://raw.githubusercontent.com/go-git/go-git/refs/heads/main/plumbing/format/gitignore/matcher.go \
- https://raw.githubusercontent.com/go-git/go-git/refs/heads/main/plumbing/format/gitignore/pattern.go
+ https://raw.githubusercontent.com/go-git/go-git/refs/heads/main/plumbing/format/gitignore/pattern.go \
+ https://raw.githubusercontent.com/go-git/go-git/refs/heads/main/plumbing/format/gitignore/pattern_test.go
 ```
diff --git a/internal/go-git-gitignore/pattern_test.go b/internal/go-git-gitignore/pattern_test.go
new file mode 100644
index 0000000..17aa16a
--- /dev/null
+++ b/internal/go-git-gitignore/pattern_test.go
@@ -0,0 +1,303 @@
+package gitignore
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+)
+
+type PatternSuite struct {
+	suite.Suite
+}
+
+func TestPatternSuite(t *testing.T) {
+	suite.Run(t, new(PatternSuite))
+}
+
+func (s *PatternSuite) TestSimpleMatch_inclusion() {
+	p := ParsePattern("!vul?ano", nil)
+	r := p.Match([]string{"value", "vulkano", "tail"}, false)
+	s.Equal(Include, r)
+}
+
+func (s *PatternSuite) TestMatch_domainLonger_mismatch() {
+	p := ParsePattern("value", []string{"head", "middle", "tail"})
+	r := p.Match([]string{"head", "middle"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestMatch_domainSameLength_mismatch() {
+	p := ParsePattern("value", []string{"head", "middle", "tail"})
+	r := p.Match([]string{"head", "middle", "tail"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestMatch_domainMismatch_mismatch() {
+	p := ParsePattern("value", []string{"head", "middle", "tail"})
+	r := p.Match([]string{"head", "middle", "_tail_", "value"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_withDomain() {
+	p := ParsePattern("middle/", []string{"value", "volcano"})
+	r := p.Match([]string{"value", "volcano", "middle", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_onlyMatchInDomain_mismatch() {
+	p := ParsePattern("volcano/", []string{"value", "volcano"})
+	r := p.Match([]string{"value", "volcano", "tail"}, true)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_atStart() {
+	p := ParsePattern("value", nil)
+	r := p.Match([]string{"value", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_inTheMiddle() {
+	p := ParsePattern("value", nil)
+	r := p.Match([]string{"head", "value", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_atEnd() {
+	p := ParsePattern("value", nil)
+	r := p.Match([]string{"head", "value"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_atStart_dirWanted() {
+	p := ParsePattern("value/", nil)
+	r := p.Match([]string{"value", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_inTheMiddle_dirWanted() {
+	p := ParsePattern("value/", nil)
+	r := p.Match([]string{"head", "value", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_atEnd_dirWanted() {
+	p := ParsePattern("value/", nil)
+	r := p.Match([]string{"head", "value"}, true)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_atEnd_dirWanted_notADir_mismatch() {
+	p := ParsePattern("value/", nil)
+	r := p.Match([]string{"head", "value"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_mismatch() {
+	p := ParsePattern("value", nil)
+	r := p.Match([]string{"head", "val", "tail"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_valueLonger_mismatch() {
+	p := ParsePattern("val", nil)
+	r := p.Match([]string{"head", "value", "tail"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_withAsterisk() {
+	p := ParsePattern("v*o", nil)
+	r := p.Match([]string{"value", "vulkano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_withQuestionMark() {
+	p := ParsePattern("vul?ano", nil)
+	r := p.Match([]string{"value", "vulkano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_magicChars() {
+	p := ParsePattern("v[ou]l[kc]ano", nil)
+	r := p.Match([]string{"value", "volcano"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestSimpleMatch_wrongPattern_mismatch() {
+	p := ParsePattern("v[ou]l[", nil)
+	r := p.Match([]string{"value", "vol["}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_fromRootWithSlash() {
+	p := ParsePattern("/value/vul?ano", nil)
+	r := p.Match([]string{"value", "vulkano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_withDomain() {
+	p := ParsePattern("middle/tail/", []string{"value", "volcano"})
+	r := p.Match([]string{"value", "volcano", "middle", "tail"}, true)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_onlyMatchInDomain_mismatch() {
+	p := ParsePattern("volcano/tail", []string{"value", "volcano"})
+	r := p.Match([]string{"value", "volcano", "tail"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_fromRootWithoutSlash() {
+	p := ParsePattern("value/vul?ano", nil)
+	r := p.Match([]string{"value", "vulkano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_fromRoot_mismatch() {
+	p := ParsePattern("value/vulkano", nil)
+	r := p.Match([]string{"value", "volcano"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_fromRoot_tooShort_mismatch() {
+	p := ParsePattern("value/vul?ano", nil)
+	r := p.Match([]string{"value"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_fromRoot_notAtRoot_mismatch() {
+	p := ParsePattern("/value/volcano", nil)
+	r := p.Match([]string{"value", "value", "volcano"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_leadingAsterisks_atStart() {
+	p := ParsePattern("**/*lue/vol?ano", nil)
+	r := p.Match([]string{"value", "volcano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_leadingAsterisks_notAtStart() {
+	p := ParsePattern("**/*lue/vol?ano", nil)
+	r := p.Match([]string{"head", "value", "volcano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_leadingAsterisks_mismatch() {
+	p := ParsePattern("**/*lue/vol?ano", nil)
+	r := p.Match([]string{"head", "value", "Volcano", "tail"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_leadingAsterisks_isDir() {
+	p := ParsePattern("**/*lue/vol?ano/", nil)
+	r := p.Match([]string{"head", "value", "volcano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_leadingAsterisks_isDirAtEnd() {
+	p := ParsePattern("**/*lue/vol?ano/", nil)
+	r := p.Match([]string{"head", "value", "volcano"}, true)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_leadingAsterisks_isDir_mismatch() {
+	p := ParsePattern("**/*lue/vol?ano/", nil)
+	r := p.Match([]string{"head", "value", "Colcano"}, true)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_leadingAsterisks_isDirNoDirAtEnd_mismatch() {
+	p := ParsePattern("**/*lue/vol?ano/", nil)
+	r := p.Match([]string{"head", "value", "volcano"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_tailingAsterisks() {
+	p := ParsePattern("/*lue/vol?ano/**", nil)
+	r := p.Match([]string{"value", "volcano", "tail", "moretail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_tailingAsterisks_exactMatch() {
+	p := ParsePattern("/*lue/vol?ano/**", nil)
+	r := p.Match([]string{"value", "volcano"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_middleAsterisks_emptyMatch() {
+	p := ParsePattern("/*lue/**/vol?ano", nil)
+	r := p.Match([]string{"value", "volcano"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_middleAsterisks_oneMatch() {
+	p := ParsePattern("/*lue/**/vol?ano", nil)
+	r := p.Match([]string{"value", "middle", "volcano"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_middleAsterisks_multiMatch() {
+	p := ParsePattern("/*lue/**/vol?ano", nil)
+	r := p.Match([]string{"value", "middle1", "middle2", "volcano"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_middleAsterisks_isDir_trailing() {
+	p := ParsePattern("/*lue/**/vol?ano/", nil)
+	r := p.Match([]string{"value", "middle1", "middle2", "volcano"}, true)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_middleAsterisks_isDir_trailing_mismatch() {
+	p := ParsePattern("/*lue/**/vol?ano/", nil)
+	r := p.Match([]string{"value", "middle1", "middle2", "volcano"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_middleAsterisks_isDir() {
+	p := ParsePattern("/*lue/**/vol?ano/", nil)
+	r := p.Match([]string{"value", "middle1", "middle2", "volcano", "tail"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_wrongDoubleAsterisk_mismatch() {
+	p := ParsePattern("/*lue/**foo/vol?ano", nil)
+	r := p.Match([]string{"value", "foo", "volcano", "tail"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_magicChars() {
+	p := ParsePattern("**/head/v[ou]l[kc]ano", nil)
+	r := p.Match([]string{"value", "head", "volcano"}, false)
+	s.Equal(Exclude, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_wrongPattern_noTraversal_mismatch() {
+	p := ParsePattern("**/head/v[ou]l[", nil)
+	r := p.Match([]string{"value", "head", "vol["}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_wrongPattern_onTraversal_mismatch() {
+	p := ParsePattern("/value/**/v[ou]l[", nil)
+	r := p.Match([]string{"value", "head", "vol["}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_issue_923() {
+	p := ParsePattern("**/android/**/GeneratedPluginRegistrant.java", nil)
+	r := p.Match([]string{"packages", "flutter_tools", "lib", "src", "android", "gradle.dart"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_folderVersusFile() {
+	p := ParsePattern("/a*/**", nil)
+	r := p.Match([]string{"ab"}, false)
+	s.Equal(NoMatch, r)
+}
+
+func (s *PatternSuite) TestGlobMatch_folderVersusFileAgain() {
+	p := ParsePattern("/a*/**/a*", nil)
+	r := p.Match([]string{"ab", "ab"}, false)
+	s.Equal(Exclude, r)
+}