Function FuzzQuoteMetaStdlib

fuzz_stdlib_test.go:711–762

=========================================================================== FuzzQuoteMetaStdlib - Fuzz QuoteMeta ===========================================================================

(f *testing.F)

// ===========================================================================

func FuzzQuoteMetaStdlib(f *testing.F) {
	// Seed with strings containing special regex characters
	seeds := []string{
		"",
		"hello",
		"hello.world",
		"$100",
		"a+b*c?",
		"(foo)",
		"[abc]",
		"^start$",
		`\d+`,
		"a|b",
		"日本語",
		`!"#$%&'()*+,-./:;<=>?@[\]^_{|}~`,
	}

	for _, s := range seeds {
		f.Add(s)
	}

	f.Fuzz(func(t *testing.T, input string) {
		// Skip non-UTF8 strings
		if !utf8.ValidString(input) {
			return
		}

		stdQuoted := regexp.QuoteMeta(input)
		cgQuoted := QuoteMeta(input)

		if stdQuoted != cgQuoted {
			t.Errorf("QuoteMeta(%q):\n  stdlib: %q\n  coregex: %q",
				input, stdQuoted, cgQuoted)
		}

		// Additionally verify that the quoted pattern matches the original
		if input != "" && cgQuoted != "" {
			stdRe := regexp.MustCompile(stdQuoted)
			cgRe := MustCompile(cgQuoted)

			testInput := "prefix" + input + "suffix"

			stdMatch := stdRe.FindString(testInput)
			cgMatch := cgRe.FindString(testInput)

			if stdMatch != cgMatch {
				t.Errorf("QuoteMeta roundtrip mismatch for %q:\n  stdlib match: %q\n  coregex match: %q",
					input, stdMatch, cgMatch)
			}
		}
	})
}

// ===========================================================================
// Helper Functions