Srujan Gaddam
4d4846c57a
Remaining tests that don't belong to any particular test suite, and only needed null asserts to be migrated. Change-Id: I05141d60e7b50653aa9633e14e832e91d9116408 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/140651 Reviewed-by: Bob Nystrom <rnystrom@google.com>
59 lines
1.4 KiB
Dart
59 lines
1.4 KiB
Dart
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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library CanvasTest;
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import 'dart:html';
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import 'package:async_helper/async_minitest.dart';
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main() {
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CanvasElement canvas;
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CanvasRenderingContext2D context;
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int width = 100;
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int height = 100;
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canvas = new CanvasElement(width: width, height: height);
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document.body!.append(canvas);
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context = canvas.context2D;
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test('CreateImageData', () {
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ImageData image = context.createImageData(canvas.width, canvas.height);
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List<int> data = image.data;
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expect(data.length, 40000);
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checkPixel(data, 0, [0, 0, 0, 0]);
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checkPixel(data, width * height - 1, [0, 0, 0, 0]);
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data[100] = 200;
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expect(data[100], equals(200));
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});
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test('toDataUrl', () {
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var canvas = new CanvasElement(width: 100, height: 100);
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var context = canvas.context2D;
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context.fillStyle = 'red';
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context.fill();
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var url = canvas.toDataUrl();
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var img = new ImageElement();
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img.onLoad.listen(expectAsync((_) {
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expect(img.complete, true);
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}));
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img.onError.listen((_) {
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fail('URL failed to load.');
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});
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img.src = url;
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});
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}
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void checkPixel(List<int> data, int offset, List<int> rgba) {
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offset *= 4;
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for (var i = 0; i < 4; ++i) {
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expect(data[offset + i], equals(rgba[i]));
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}
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}
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