GoldeFiles

GoldenHelpers.go

// MustWriteGolden updates the golden file for a given test t.
func MustWriteGolden(t *testing.T, content []byte) {
  gp := filepath.Join("testdata", t.Name() +".golden")
  if err := ioutil.WriteFile(gp, content, 0644); err != nil {
    t.FailF("failed to update golden file: %s", err)
  }
}
// MustReadGolden reads the golden file for a given test t.
func MustReadGolden(t *testing.T) (content []byte) {
  gp := filepath.Join("testdata", t.Name() +".golden")
  g, err := ioutil.ReadFile(gp)
  if err != nil {
    t.FailF("failed reading .golden: %s", err)
  }
  return g
}
// MustCheckGolden compares v with its golden file
func MustCheckGolden(t *testing.T, v interface{}) {
  res, ok := v.([]byte)
  if !ok {
    res = MustJSONMarshal(t, v)
  }
  if *update {
    MustWriteGolden(t, res)
  }
  g := MustReadGolden(t)
  if bytes.Equal(res, g) {
    t.FatalF("err: %v not equal to %v", res, g)
  }
}