blob: 9ee04b3ad1addea8909d98588eb90cb1438230bd [file] [log] [blame]
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'dart:html';
import 'package:expect/minitest.dart';
main() {
var canvas;
canvas = new Element.tag('canvas');
canvas.attributes['width'] = '100';
canvas.attributes['height'] = '100';
var isCanvasRenderingContext = predicate(
(x) => x is CanvasRenderingContext, 'is a CanvasRenderingContext');
var isNotCanvasRenderingContext = predicate(
(x) => x is! CanvasRenderingContext, 'is not a CanvasRenderingContext');
var isCanvasRenderingContext2D = predicate(
(x) => x is CanvasRenderingContext2D, 'is a CanvasRenderingContext2D');
var isNotCanvasRenderingContext2D = predicate(
(x) => x is! CanvasRenderingContext2D,
'is not a CanvasRenderingContext2D');
var isElement = predicate((x) => x is Element, 'is an Element');
var isNotElement = predicate((x) => x is! Element, 'is not an Element');
var isCanvasElement =
predicate((x) => x is CanvasElement, 'is a CanvasElement');
var isNotCanvasElement =
predicate((x) => x is! CanvasElement, 'is not a CanvasElement');
var isImageData = predicate((x) => x is ImageData, 'is an ImageData');
var isNotImageData = predicate((x) => x is! ImageData, 'is not an ImageData');
//var isUint8ClampedArray =
// predicate((x) => x is Uint8ClampedArray, 'is a Uint8ClampedArray');
var isIntList = predicate((x) => x is List<int>, 'is a List<int>');
test('Instanceof', () {
expect(canvas, isNotCanvasRenderingContext);
expect(canvas, isNotCanvasRenderingContext2D);
expect(canvas, isElement);
expect(canvas, isCanvasElement);
expect(canvas, isNotImageData);
// expect(canvas, isNot(isCanvasPixelArray));
var context = canvas.getContext('2d');
expect(context, isCanvasRenderingContext);
expect(context, isCanvasRenderingContext2D);
expect(context, isNotElement);
expect(context, isNotCanvasElement);
expect(context, isNotImageData);
// expect(context, isNot(isCanvasPixelArray));
// FIXME(b/5286633): Interface injection type check workaround.
var image = (context as CanvasRenderingContext2D)
.createImageData(canvas.width as dynamic, canvas.height as dynamic);
expect(image, isNotCanvasRenderingContext);
expect(image, isNotCanvasRenderingContext2D);
expect(image, isNotElement);
expect(image, isNotCanvasElement);
expect(image, isImageData);
// expect(image, isNot(isCanvasPixelArray));
// Include CanvasPixelArray since constructor and prototype are not
// available until one is created.
var bytes =;
expect(bytes, isNotCanvasRenderingContext);
expect(bytes, isNotCanvasRenderingContext2D);
expect(bytes, isNotElement);
expect(bytes, isNotCanvasElement);
expect(bytes, isNotImageData);
expect(bytes, isIntList);
// FIXME: Ensure this is an SpanElement when we next update
// WebKit IDL.
var span = new Element.tag('span');
expect(span, isElement);