test: add unit tests for IgnoreFileRegexPattern to validate ignored paths

core/utils/file_test.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"regexp"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -38,3 +39,41 @@ func TestIsDir(t *testing.T) {
 	wrongRes := IsDir(wrongString)
 	assert.False(t, wrongRes, "Expected non-existing path to return false")
 }
+
+func TestIgnoreFileRegexPattern(t *testing.T) {
+	ignoreRegex, err := regexp.Compile(IgnoreFileRegexPattern)
+	assert.NoError(t, err, "Regex should compile without error")
+
+	testCases := []struct {
+		path     string
+		expected bool
+		desc     string
+	}{
+		// Should be ignored (directories)
+		{".git/", true, ".git directory should be ignored"},
+		{".git/config", true, ".git/config should be ignored"},
+		{".git/objects/pack", true, ".git subdirectory should be ignored"},
+		{"node_modules/", true, "node_modules directory should be ignored"},
+		{"node_modules/package/index.js", true, "node_modules file should be ignored"},
+		{"src/__pycache__/", true, "__pycache__ directory should be ignored"},
+
+		// Should be ignored (file extensions)
+		{"file.tmp", true, ".tmp files should be ignored"},
+		{"file.temp", true, ".temp files should be ignored"},
+		{"file.log", true, ".log files should be ignored"},
+		{"file.swp", true, ".swp files should be ignored"},
+		{"file.pyc", true, ".pyc files should be ignored"},
+
+		// Should NOT be ignored
+		{"main.py", false, "Python files should not be ignored"},
+		{"src/app.js", false, "JavaScript files should not be ignored"},
+		{".gitignore", false, ".gitignore file should not be ignored"},
+		{".github/workflows/ci.yml", false, ".github directory should not be ignored"},
+		{"config.json", false, "JSON files should not be ignored"},
+	}
+
+	for _, tc := range testCases {
+		result := ignoreRegex.MatchString(tc.path)
+		assert.Equal(t, tc.expected, result, tc.desc)
+	}
+}