| // 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 'package:test/test.dart'; |
| |
| import '../rendering/rendering_tester.dart'; |
| import 'mocks_for_image_cache.dart'; |
| |
| void main() { |
| new TestRenderingFlutterBinding(); // initializes the imageCache |
| group(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 = const 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 = const 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); |
| }); |
| }); |
| } |