595cd23c8c
* Revert "Revert "Change all ocurrences of '$runtimeType#$hashCode' to use the idAndType method. (#10871)" (#10880)" This reverts commit ceb814aa647ecd310794a72a7a5c28820ec57a25.
235 lines
7.8 KiB
Dart
235 lines
7.8 KiB
Dart
// Copyright 2016 The Chromium 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:async';
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import 'dart:typed_data';
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import 'dart:ui' as ui show Image;
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import 'package:flutter/foundation.dart';
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import 'package:flutter/rendering.dart';
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import 'package:flutter/services.dart';
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import 'package:flutter/widgets.dart';
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import 'package:flutter_test/flutter_test.dart';
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class TestImage extends ui.Image {
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TestImage(this.scale);
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final double scale;
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@override
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int get width => (48*scale).floor();
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@override
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int get height => (48*scale).floor();
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@override
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void dispose() { }
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}
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class TestByteData implements ByteData {
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TestByteData(this.scale);
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final double scale;
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@override
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dynamic noSuchMethod(Invocation invocation) => null;
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}
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String testManifest = '''
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{
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"assets/image.png" : [
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"assets/1.5x/image.png",
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"assets/2.0x/image.png",
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"assets/3.0x/image.png",
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"assets/4.0x/image.png"
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]
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}
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''';
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class TestAssetBundle extends CachingAssetBundle {
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@override
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Future<ByteData> load(String key) {
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ByteData data;
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switch (key) {
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case 'assets/image.png':
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data = new TestByteData(1.0);
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break;
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case 'assets/1.5x/image.png':
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data = new TestByteData(1.5);
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break;
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case 'assets/2.0x/image.png':
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data = new TestByteData(2.0);
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break;
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case 'assets/3.0x/image.png':
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data = new TestByteData(3.0);
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break;
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case 'assets/4.0x/image.png':
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data = new TestByteData(4.0);
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break;
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}
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return new SynchronousFuture<ByteData>(data);
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}
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@override
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Future<String> loadString(String key, { bool cache: true }) {
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if (key == 'AssetManifest.json')
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return new SynchronousFuture<String>(testManifest);
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return null;
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}
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@override
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String toString() => '${describeIdentity(this)}()';
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}
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class TestAssetImage extends AssetImage {
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TestAssetImage(String name) : super(name);
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@override
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Future<ImageInfo> loadAsync(AssetBundleImageKey key) {
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ImageInfo result;
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key.bundle.load(key.name).then<Null>((ByteData data) {
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decodeImage(data).then<Null>((ui.Image image) {
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result = new ImageInfo(image: image, scale: key.scale);
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});
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});
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assert(result != null);
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return new SynchronousFuture<ImageInfo>(result);
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}
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@override
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Future<ui.Image> decodeImage(covariant TestByteData data) {
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return new SynchronousFuture<ui.Image>(new TestImage(data.scale));
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}
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}
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Widget buildImageAtRatio(String image, Key key, double ratio, bool inferSize) {
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const double windowSize = 500.0; // 500 logical pixels
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const double imageSize = 200.0; // 200 logical pixels
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return new MediaQuery(
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data: new MediaQueryData(
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size: const Size(windowSize, windowSize),
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devicePixelRatio: ratio,
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padding: const EdgeInsets.all(0.0)
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),
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child: new DefaultAssetBundle(
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bundle: new TestAssetBundle(),
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child: new Center(
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child: inferSize ?
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new Image(
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key: key,
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image: new TestAssetImage(image)
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) :
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new Image(
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key: key,
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image: new TestAssetImage(image),
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height: imageSize,
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width: imageSize,
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fit: BoxFit.fill
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)
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)
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)
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);
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}
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RenderImage getRenderImage(WidgetTester tester, Key key) {
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return tester.renderObject<RenderImage>(find.byKey(key));
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}
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TestImage getTestImage(WidgetTester tester, Key key) {
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return tester.renderObject<RenderImage>(find.byKey(key)).image;
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}
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Future<Null> pumpTreeToLayout(WidgetTester tester, Widget widget) {
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final Duration pumpDuration = const Duration(milliseconds: 0);
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final EnginePhase pumpPhase = EnginePhase.layout;
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return tester.pumpWidget(widget, pumpDuration, pumpPhase);
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}
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void main() {
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final String image = 'assets/image.png';
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testWidgets('Image for device pixel ratio 1.0', (WidgetTester tester) async {
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const double ratio = 1.0;
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Key key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, false));
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expect(getRenderImage(tester, key).size, const Size(200.0, 200.0));
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expect(getTestImage(tester, key).scale, 1.0);
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key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, true));
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expect(getRenderImage(tester, key).size, const Size(48.0, 48.0));
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expect(getTestImage(tester, key).scale, 1.0);
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});
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testWidgets('Image for device pixel ratio 0.5', (WidgetTester tester) async {
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const double ratio = 0.5;
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Key key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, false));
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expect(getRenderImage(tester, key).size, const Size(200.0, 200.0));
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expect(getTestImage(tester, key).scale, 1.0);
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key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, true));
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expect(getRenderImage(tester, key).size, const Size(48.0, 48.0));
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expect(getTestImage(tester, key).scale, 1.0);
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});
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testWidgets('Image for device pixel ratio 1.5', (WidgetTester tester) async {
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const double ratio = 1.5;
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Key key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, false));
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expect(getRenderImage(tester, key).size, const Size(200.0, 200.0));
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expect(getTestImage(tester, key).scale, 1.5);
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key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, true));
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expect(getRenderImage(tester, key).size, const Size(48.0, 48.0));
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expect(getTestImage(tester, key).scale, 1.5);
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});
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testWidgets('Image for device pixel ratio 1.75', (WidgetTester tester) async {
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const double ratio = 1.75;
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Key key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, false));
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expect(getRenderImage(tester, key).size, const Size(200.0, 200.0));
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expect(getTestImage(tester, key).scale, 1.5);
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key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, true));
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expect(getRenderImage(tester, key).size, const Size(48.0, 48.0));
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expect(getTestImage(tester, key).scale, 1.5);
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});
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testWidgets('Image for device pixel ratio 2.3', (WidgetTester tester) async {
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const double ratio = 2.3;
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Key key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, false));
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expect(getRenderImage(tester, key).size, const Size(200.0, 200.0));
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expect(getTestImage(tester, key).scale, 2.0);
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key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, true));
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expect(getRenderImage(tester, key).size, const Size(48.0, 48.0));
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expect(getTestImage(tester, key).scale, 2.0);
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});
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testWidgets('Image for device pixel ratio 3.7', (WidgetTester tester) async {
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const double ratio = 3.7;
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Key key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, false));
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expect(getRenderImage(tester, key).size, const Size(200.0, 200.0));
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expect(getTestImage(tester, key).scale, 4.0);
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key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, true));
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expect(getRenderImage(tester, key).size, const Size(48.0, 48.0));
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expect(getTestImage(tester, key).scale, 4.0);
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});
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testWidgets('Image for device pixel ratio 5.1', (WidgetTester tester) async {
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const double ratio = 5.1;
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Key key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, false));
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expect(getRenderImage(tester, key).size, const Size(200.0, 200.0));
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expect(getTestImage(tester, key).scale, 4.0);
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key = new GlobalKey();
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await pumpTreeToLayout(tester, buildImageAtRatio(image, key, ratio, true));
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expect(getRenderImage(tester, key).size, const Size(48.0, 48.0));
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expect(getTestImage(tester, key).scale, 4.0);
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});
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}
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