Added an internal package for tags filtering

internal/tags/tag_filter.go

@@ -0,0 +1,60 @@
+package tags
+
+import (
+	"strings"
+
+	"github.com/cucumber/messages-go/v10"
+)
+
+func ApplyTagFilter(filter string, pickles []*messages.Pickle) []*messages.Pickle {
+	if filter == "" {
+		return pickles
+	}
+
+	var result = []*messages.Pickle{}
+
+	for _, pickle := range pickles {
+		if match(filter, pickle.Tags) {
+			result = append(result, pickle)
+		}
+	}
+
+	return result
+}
+
+// based on http://behat.readthedocs.org/en/v2.5/guides/6.cli.html#gherkin-filters
+func match(filter string, tags []*messages.Pickle_PickleTag) (ok bool) {
+	ok = true
+
+	for _, andTags := range strings.Split(filter, "&&") {
+		var okComma bool
+
+		for _, tag := range strings.Split(andTags, ",") {
+			tag = strings.TrimSpace(tag)
+			tag = strings.Replace(tag, "@", "", -1)
+
+			okComma = contains(tags, tag) || okComma
+
+			if tag[0] == '~' {
+				tag = tag[1:]
+				okComma = !contains(tags, tag) || okComma
+			}
+		}
+
+		ok = ok && okComma
+	}
+
+	return
+}
+
+func contains(tags []*messages.Pickle_PickleTag, tag string) bool {
+	for _, t := range tags {
+		tagName := strings.Replace(t.Name, "@", "", -1)
+
+		if tagName == tag {
+			return true
+		}
+	}
+
+	return false
+}

internal/tags/tag_filter_test.go

@@ -0,0 +1,53 @@
+package tags_test
+
+import (
+	"testing"
+
+	"github.com/cucumber/messages-go/v10"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/cucumber/godog/internal/tags"
+)
+
+type tag = messages.Pickle_PickleTag
+type pickle = messages.Pickle
+
+type testcase struct {
+	filter   string
+	expected []*pickle
+}
+
+var testdata = []*pickle{p1, p2, p3}
+var p1 = &pickle{Id: "one", Tags: []*tag{{Name: "@one"}, {Name: "@wip"}}}
+var p2 = &pickle{Id: "two", Tags: []*tag{{Name: "@two"}, {Name: "@wip"}}}
+var p3 = &pickle{Id: "three", Tags: []*tag{{Name: "@hree"}, {Name: "@wip"}}}
+
+var testcases = []testcase{
+	{filter: "", expected: testdata},
+
+	{filter: "@one", expected: []*pickle{p1}},
+	{filter: "~@one", expected: []*pickle{p2, p3}},
+	{filter: "one", expected: []*pickle{p1}},
+	{filter: " one ", expected: []*pickle{p1}},
+
+	{filter: "@one,@two", expected: []*pickle{p1, p2}},
+	{filter: "@one,~@two", expected: []*pickle{p1, p3}},
+	{filter: " @one , @two ", expected: []*pickle{p1, p2}},
+
+	{filter: "@one&&@two", expected: []*pickle{}},
+	{filter: "@one&&~@two", expected: []*pickle{p1}},
+	{filter: "@one&&@wip", expected: []*pickle{p1}},
+
+	{filter: "@one&&@two,@wip", expected: []*pickle{p1}},
+}
+
+func Test_ApplyTagFilter(t *testing.T) {
+	for _, tc := range testcases {
+		t.Run("", func(t *testing.T) {
+			t.Parallel()
+
+			actual := tags.ApplyTagFilter(tc.filter, testdata)
+			assert.Equal(t, tc.expected, actual)
+		})
+	}
+}

parser.go

@@ -12,6 +12,8 @@ import (
 
 	"github.com/cucumber/gherkin-go/v11"
 	"github.com/cucumber/messages-go/v10"
+
+	"github.com/cucumber/godog/internal/tags"
 )
 
 var pathLineRe = regexp.MustCompile(`:([\d]+)$`)
@@ -149,9 +151,9 @@ func parseFeatures(filter string, paths []string) ([]*feature, error) {
 	return features, nil
 }
 
-func filterFeatures(tags string, features []*feature) (result []*feature) {
+func filterFeatures(filter string, features []*feature) (result []*feature) {
 	for _, ft := range features {
-		ft.pickles = applyTagFilter(tags, ft.pickles)
+		ft.pickles = tags.ApplyTagFilter(filter, ft.pickles)
 
 		if ft.Feature != nil && len(ft.pickles) > 0 {
 			result = append(result, ft)
@@ -160,17 +162,3 @@ func filterFeatures(tags string, features []*feature) (result []*feature) {
 
 	return
 }
-
-func applyTagFilter(tags string, pickles []*messages.Pickle) (result []*messages.Pickle) {
-	if len(tags) == 0 {
-		return pickles
-	}
-
-	for _, pickle := range pickles {
-		if matchesTags(tags, pickle.Tags) {
-			result = append(result, pickle)
-		}
-	}
-
-	return
-}

suite_context_test.go

@@ -11,9 +11,11 @@ import (
 	"strings"
 
 	"github.com/cucumber/gherkin-go/v11"
-	"github.com/cucumber/godog/colors"
 	"github.com/cucumber/messages-go/v10"
 	"github.com/stretchr/testify/assert"
+
+	"github.com/cucumber/godog/colors"
+	"github.com/cucumber/godog/internal/tags"
 )
 
 // InitializeScenario provides steps for godog suite execution and
@@ -180,13 +182,13 @@ func (tc *godogFeaturesScenario) iRunFeatureSuiteWithFormatter(name string) erro
 	return tc.iRunFeatureSuiteWithTagsAndFormatter("", f)
 }
 
-func (tc *godogFeaturesScenario) iRunFeatureSuiteWithTagsAndFormatter(tags string, fmtFunc FormatterFunc) error {
+func (tc *godogFeaturesScenario) iRunFeatureSuiteWithTagsAndFormatter(filter string, fmtFunc FormatterFunc) error {
 	if err := tc.parseFeatures(); err != nil {
 		return err
 	}
 
 	for _, feat := range tc.features {
-		feat.pickles = applyTagFilter(tags, feat.pickles)
+		feat.pickles = tags.ApplyTagFilter(filter, feat.pickles)
 	}
 
 	tc.testedSuite.storage = newStorage()