mirror of
https://github.com/encounter/engine.git
synced 2026-03-30 11:09:55 -07:00
Jason Simmons
93 lines
3.0 KiB
Dart
93 lines
3.0 KiB
Dart
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:io';
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import 'dart:typed_data';
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import 'dart:ui' as ui;
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import 'package:test/test.dart';
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import 'package:path/path.dart' as path;
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void main() {
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test('Animation metadata', () async {
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Uint8List data = await _getSkiaResource('alphabetAnim.gif').readAsBytes();
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ui.Codec codec = await ui.instantiateImageCodec(data);
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expect(codec, isNotNull);
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expect(codec.frameCount, 13);
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expect(codec.repetitionCount, 0);
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codec.dispose();
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data = await _getSkiaResource('test640x479.gif').readAsBytes();
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codec = await ui.instantiateImageCodec(data);
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expect(codec.frameCount, 4);
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expect(codec.repetitionCount, -1);
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});
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test('Fails with invalid data', () async {
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final Uint8List data = Uint8List.fromList(<int>[1, 2, 3]);
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expect(
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() => ui.instantiateImageCodec(data),
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throwsA(exceptionWithMessage('Could not instantiate image codec.'))
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);
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});
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test('nextFrame', () async {
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final Uint8List data = await _getSkiaResource('test640x479.gif').readAsBytes();
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final ui.Codec codec = await ui.instantiateImageCodec(data);
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final List<List<int>> decodedFrameInfos = <List<int>>[];
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for (int i = 0; i < 5; i++) {
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final ui.FrameInfo frameInfo = await codec.getNextFrame();
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decodedFrameInfos.add(<int>[
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frameInfo.duration.inMilliseconds,
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frameInfo.image.width,
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frameInfo.image.height,
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]);
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}
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expect(decodedFrameInfos, equals(<List<int>>[
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<int>[200, 640, 479],
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<int>[200, 640, 479],
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<int>[200, 640, 479],
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<int>[200, 640, 479],
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<int>[200, 640, 479],
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]));
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});
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test('non animated image', () async {
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final Uint8List data = await _getSkiaResource('baby_tux.png').readAsBytes();
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final ui.Codec codec = await ui.instantiateImageCodec(data);
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final List<List<int>> decodedFrameInfos = <List<int>>[];
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for (int i = 0; i < 2; i++) {
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final ui.FrameInfo frameInfo = await codec.getNextFrame();
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decodedFrameInfos.add(<int>[
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frameInfo.duration.inMilliseconds,
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frameInfo.image.width,
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frameInfo.image.height,
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]);
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}
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expect(decodedFrameInfos, equals(<List<int>>[
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<int>[0, 240, 246],
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<int>[0, 240, 246],
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]));
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});
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}
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/// Returns a File handle to a file in the skia/resources directory.
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File _getSkiaResource(String fileName) {
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// As Platform.script is not working for flutter_tester
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// (https://github.com/flutter/flutter/issues/12847), this is currently
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// assuming the curent working directory is engine/src.
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// This is fragile and should be changed once the Platform.script issue is
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// resolved.
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final String assetPath =
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path.join('third_party', 'skia', 'resources', 'images', fileName);
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return File(assetPath);
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}
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Matcher exceptionWithMessage(String m) {
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return predicate<Exception>((Exception e) {
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return e is Exception && e.toString().contains(m);
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});
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}
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