Function TestInterfaceCoders

types/jsonx/json_test.go:47–139

(t *testing.T)

}

func TestInterfaceCoders(t *testing.T) {
	var opts json.Options = json.JoinOptions(
		json.WithMarshalers(json.MarshalToFunc(interfaceCoders.Marshal)),
		json.WithUnmarshalers(json.UnmarshalFromFunc(interfaceCoders.Unmarshal)),
	)

	errSkipMarshal := errors.New("skip marshal")
	makeFiller := func() InterfaceWrapper {
		return InterfaceWrapper{&Baz{"fizz", "buzz"}}
	}

	for _, tt := range []struct {
		label              string
		wantVal            InterfaceWrapper
		wantJSON           string
		wantMarshalError   error
		wantUnmarshalError error
	}{{
		label:    "Null",
		wantVal:  InterfaceWrapper{},
		wantJSON: `null`,
	}, {
		label:    "Foo",
		wantVal:  InterfaceWrapper{Foo("hello")},
		wantJSON: `{"Foo":"hello"}`,
	}, {
		label:    "BarPointer",
		wantVal:  InterfaceWrapper{new(Bar(5))},
		wantJSON: `{"Bar":5}`,
	}, {
		label:   "BarValue",
		wantVal: InterfaceWrapper{Bar(5)},
		// NOTE: We could handle BarValue just like BarPointer,
		// but round-trip marshal/unmarshal would not be identical.
		wantMarshalError: errUnknownTypeName,
	}, {
		label:    "Baz",
		wantVal:  InterfaceWrapper{&Baz{"alpha", "omega"}},
		wantJSON: `{"Baz":{"Fizz":"alpha","Buzz":"omega"}}`,
	}, {
		label:              "Unknown",
		wantVal:            makeFiller(),
		wantJSON:           `{"Unknown":[1,2,3]}`,
		wantMarshalError:   errSkipMarshal,
		wantUnmarshalError: errUnknownTypeName,
	}, {
		label:              "Empty",
		wantVal:            makeFiller(),
		wantJSON:           `{}`,
		wantMarshalError:   errSkipMarshal,
		wantUnmarshalError: errNonSingularValue,
	}, {
		label:              "Duplicate",
		wantVal:            InterfaceWrapper{Foo("hello")}, // first entry wins
		wantJSON:           `{"Foo":"hello","Bar":5}`,
		wantMarshalError:   errSkipMarshal,
		wantUnmarshalError: errNonSingularValue,
	}} {