Bob Nystrom
307742d07e
Since unittest is known to work with test.dart as a test runner and is strong mode clean, it's a safer bet than test. Change-Id: Id120d4f871827b1f131dff2a5ef2f7efb15a8382 Reviewed-on: https://dart-review.googlesource.com/12125 Reviewed-by: Terry Lucas <terry@google.com>
55 lines
1.2 KiB
Dart
55 lines
1.2 KiB
Dart
library CanvasTest;
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import 'dart:html';
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import 'package:unittest/unittest.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, hasLength(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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