// Copyright 2016 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'package:flutter/painting.dart'; import '../flutter_test_alternative.dart'; import '../rendering/rendering_tester.dart'; import 'mocks_for_image_cache.dart'; void main() { group(ImageCache, () { setUpAll(() { TestRenderingFlutterBinding(); // initializes the imageCache }); tearDown(() { imageCache.clear(); imageCache.maximumSize = 1000; imageCache.maximumSizeBytes = 10485760; }); test('maintains cache size', () async { imageCache.maximumSize = 3; final TestImageInfo a = await extractOneFrame(const TestImageProvider(1, 1).resolve(ImageConfiguration.empty)); expect(a.value, equals(1)); final TestImageInfo b = await extractOneFrame(const TestImageProvider(1, 2).resolve(ImageConfiguration.empty)); expect(b.value, equals(1)); final TestImageInfo c = await extractOneFrame(const TestImageProvider(1, 3).resolve(ImageConfiguration.empty)); expect(c.value, equals(1)); final TestImageInfo d = await extractOneFrame(const TestImageProvider(1, 4).resolve(ImageConfiguration.empty)); expect(d.value, equals(1)); final TestImageInfo e = await extractOneFrame(const TestImageProvider(1, 5).resolve(ImageConfiguration.empty)); expect(e.value, equals(1)); final TestImageInfo f = await extractOneFrame(const TestImageProvider(1, 6).resolve(ImageConfiguration.empty)); expect(f.value, equals(1)); expect(f, equals(a)); // cache still only has one entry in it: 1(1) final TestImageInfo g = await extractOneFrame(const TestImageProvider(2, 7).resolve(ImageConfiguration.empty)); expect(g.value, equals(7)); // cache has two entries in it: 1(1), 2(7) final TestImageInfo h = await extractOneFrame(const TestImageProvider(1, 8).resolve(ImageConfiguration.empty)); expect(h.value, equals(1)); // cache still has two entries in it: 2(7), 1(1) final TestImageInfo i = await extractOneFrame(const TestImageProvider(3, 9).resolve(ImageConfiguration.empty)); expect(i.value, equals(9)); // cache has three entries in it: 2(7), 1(1), 3(9) final TestImageInfo j = await extractOneFrame(const TestImageProvider(1, 10).resolve(ImageConfiguration.empty)); expect(j.value, equals(1)); // cache still has three entries in it: 2(7), 3(9), 1(1) final TestImageInfo k = await extractOneFrame(const TestImageProvider(4, 11).resolve(ImageConfiguration.empty)); expect(k.value, equals(11)); // cache has three entries: 3(9), 1(1), 4(11) final TestImageInfo l = await extractOneFrame(const TestImageProvider(1, 12).resolve(ImageConfiguration.empty)); expect(l.value, equals(1)); // cache has three entries: 3(9), 4(11), 1(1) final TestImageInfo m = await extractOneFrame(const TestImageProvider(2, 13).resolve(ImageConfiguration.empty)); expect(m.value, equals(13)); // cache has three entries: 4(11), 1(1), 2(13) final TestImageInfo n = await extractOneFrame(const TestImageProvider(3, 14).resolve(ImageConfiguration.empty)); expect(n.value, equals(14)); // cache has three entries: 1(1), 2(13), 3(14) final TestImageInfo o = await extractOneFrame(const TestImageProvider(4, 15).resolve(ImageConfiguration.empty)); expect(o.value, equals(15)); // cache has three entries: 2(13), 3(14), 4(15) final TestImageInfo p = await extractOneFrame(const TestImageProvider(1, 16).resolve(ImageConfiguration.empty)); expect(p.value, equals(16)); // cache has three entries: 3(14), 4(15), 1(16) }); test('clear removes all images and resets cache size', () async { const TestImage testImage = TestImage(width: 8, height: 8); expect(imageCache.currentSize, 0); expect(imageCache.currentSizeBytes, 0); await extractOneFrame(const TestImageProvider(1, 1, image: testImage).resolve(ImageConfiguration.empty)); await extractOneFrame(const TestImageProvider(2, 2, image: testImage).resolve(ImageConfiguration.empty)); expect(imageCache.currentSize, 2); expect(imageCache.currentSizeBytes, 256 * 2); imageCache.clear(); expect(imageCache.currentSize, 0); expect(imageCache.currentSizeBytes, 0); }); test('evicts individual images', () async { const TestImage testImage = TestImage(width: 8, height: 8); await extractOneFrame(const TestImageProvider(1, 1, image: testImage).resolve(ImageConfiguration.empty)); await extractOneFrame(const TestImageProvider(2, 2, image: testImage).resolve(ImageConfiguration.empty)); expect(imageCache.currentSize, 2); expect(imageCache.currentSizeBytes, 256 * 2); expect(imageCache.evict(1), true); expect(imageCache.currentSize, 1); expect(imageCache.currentSizeBytes, 256); }); test('Increases cache size if an image is loaded that is larger then the maximum size', () async { const TestImage testImage = TestImage(width: 8, height: 8); imageCache.maximumSizeBytes = 1; await extractOneFrame(const TestImageProvider(1, 1, image: testImage).resolve(ImageConfiguration.empty)); expect(imageCache.currentSize, 1); expect(imageCache.currentSizeBytes, 256); expect(imageCache.maximumSizeBytes, 256 + 1000); }); test('Returns null if an error is caught resolving an image', () { final ErrorImageProvider errorImage = ErrorImageProvider(); expect(() => imageCache.putIfAbsent(errorImage, () => errorImage.load(errorImage, null)), throwsA(isInstanceOf<Error>())); bool caughtError = false; final ImageStreamCompleter result = imageCache.putIfAbsent(errorImage, () => errorImage.load(errorImage, null), onError: (dynamic error, StackTrace stackTrace) { caughtError = true; }); expect(result, null); expect(caughtError, true); }); test('already pending image is returned when it is put into the cache again', () async { const TestImage testImage = TestImage(width: 8, height: 8); final TestImageStreamCompleter completer1 = TestImageStreamCompleter(); final TestImageStreamCompleter completer2 = TestImageStreamCompleter(); final TestImageStreamCompleter resultingCompleter1 = imageCache.putIfAbsent(testImage, () { return completer1; }); final TestImageStreamCompleter resultingCompleter2 = imageCache.putIfAbsent(testImage, () { return completer2; }); expect(resultingCompleter1, completer1); expect(resultingCompleter2, completer1); }); test('pending image is removed when cache is cleared', () async { const TestImage testImage = TestImage(width: 8, height: 8); final TestImageStreamCompleter completer1 = TestImageStreamCompleter(); final TestImageStreamCompleter completer2 = TestImageStreamCompleter(); final TestImageStreamCompleter resultingCompleter1 = imageCache.putIfAbsent(testImage, () { return completer1; }); imageCache.clear(); final TestImageStreamCompleter resultingCompleter2 = imageCache.putIfAbsent(testImage, () { return completer2; }); expect(resultingCompleter1, completer1); expect(resultingCompleter2, completer2); }); test('pending image is removed when image is evicted', () async { const TestImage testImage = TestImage(width: 8, height: 8); final TestImageStreamCompleter completer1 = TestImageStreamCompleter(); final TestImageStreamCompleter completer2 = TestImageStreamCompleter(); final TestImageStreamCompleter resultingCompleter1 = imageCache.putIfAbsent(testImage, () { return completer1; }); imageCache.evict(testImage); final TestImageStreamCompleter resultingCompleter2 = imageCache.putIfAbsent(testImage, () { return completer2; }); expect(resultingCompleter1, completer1); expect(resultingCompleter2, completer2); }); test('failed image can successfully be removed from the cache\'s pending images', () async { const TestImage testImage = TestImage(width: 8, height: 8); const FailingTestImageProvider(1, 1, image: testImage) .resolve(ImageConfiguration.empty) .addListener(ImageStreamListener( (ImageInfo image, bool synchronousCall) { }, onError: (dynamic exception, StackTrace stackTrace) { final bool evicationResult = imageCache.evict(1); expect(evicationResult, isTrue); }, )); }); }); }