Function testJSONMarshalOnly

github/github_test.go:264–288

testJSONMarshalOnly tests JSON marshaling by comparing the marshaled output with the expected JSON string. This function compares JSON by unmarshaling both values into any and using cmp.Diff. This means the comparison ignores: - White space differences - Key ordering in objects - Numeric type diffe

(t *testing.T, v T, want string)

// In most cases, use testJSONMarshal instead.
// Only use this function in rare cases where you need to test marshaling behavior in isolation.
func testJSONMarshalOnly[T any](t *testing.T, v T, want string) {
	t.Helper()

	got, err := json.Marshal(v)
	if err != nil {
		t.Fatalf("Unable to marshal got JSON for %#v: %v", v, err)
	}

	// Unmarshal both the marshaled output and expected JSON into any
	// to enable semantic comparison that ignores formatting differences
	var gotAny any
	if err := json.Unmarshal(got, &gotAny); err != nil {
		t.Fatalf("Unable to unmarshal got JSON %v: %v", got, err)
	}

	var wantAny any
	if err := json.Unmarshal([]byte(want), &wantAny); err != nil {
		t.Fatalf("Unable to unmarshal want JSON %v: %v", want, err)
	}

	// Compare the semantic content
	if diff := cmp.Diff(wantAny, gotAny); diff != "" {
		t.Errorf("json.Marshal returned:\n%v\nwant:\n%v\ndiff:\n%v", got, want, diff)
	}
}

// testJSONUnmarshalOnly tests JSON unmarshaling by parsing the JSON string
// and comparing the result with the expected value.