// Sources files are supplied as fullshort slice.
// It consists of pairs: full path to source file and its base name.
func errorCheck(outStr string, wantAuto bool, fullshort ...string) (err error) {
	var errs []error
	out := splitOutput(outStr, wantAuto)
	// Cut directory name.
	for i := range out {
		for j := 0; j < len(fullshort); j += 2 {
			full, short := fullshort[j], fullshort[j+1]
			out[i] = strings.ReplaceAll(out[i], full, short)
		}

			})
			goldenFile := fmt.Sprintf("testdata/%s.yaml.golden", tt.name)
			res := append(output.Gateway, output.VirtualService...)
			util.CompareContent(t, marshalYaml(t, res), goldenFile)
			golden := splitOutput(readConfig(t, goldenFile, validator, tt.validationIgnorer))

			// sort virtual services to make the order deterministic
			sort.Slice(golden.VirtualService, func(i, j int) bool {

		} else {
			return fmt.Errorf("output should be empty when (optional) expected-output file %s is not present. Instead saw\n%s", filename, got)
		}
	}
	return nil
}

func splitOutput(out string, wantAuto bool) []string {
	// gc error messages continue onto additional lines with leading tabs.
	// Split the output at the beginning of each line that doesn't begin with a tab.