image_cache_resize_test.dart 3.53 KB
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// 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.

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import 'package:flutter/painting.dart';
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import '../flutter_test_alternative.dart';
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import '../rendering/rendering_tester.dart';
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import 'mocks_for_image_cache.dart';

void main() {
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  TestRenderingFlutterBinding(); // initializes the imageCache
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  group(ImageCache, () {
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    tearDown(() {
      imageCache.clear();
      imageCache.maximumSize = 1000;
      imageCache.maximumSizeBytes = 10485760;
    });
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    test('Image cache resizing based on count', () async {
      imageCache.maximumSize = 2;
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      final TestImageInfo a = await extractOneFrame(const TestImageProvider(1, 1).resolve(ImageConfiguration.empty));
      final TestImageInfo b = await extractOneFrame(const TestImageProvider(2, 2).resolve(ImageConfiguration.empty));
      final TestImageInfo c = await extractOneFrame(const TestImageProvider(3, 3).resolve(ImageConfiguration.empty));
      final TestImageInfo d = await extractOneFrame(const TestImageProvider(1, 4).resolve(ImageConfiguration.empty));
      expect(a.value, equals(1));
      expect(b.value, equals(2));
      expect(c.value, equals(3));
      expect(d.value, equals(4));
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      imageCache.maximumSize = 0;
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      final TestImageInfo e = await extractOneFrame(const TestImageProvider(1, 5).resolve(ImageConfiguration.empty));
      expect(e.value, equals(5));
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      final TestImageInfo f = await extractOneFrame(const TestImageProvider(1, 6).resolve(ImageConfiguration.empty));
      expect(f.value, equals(6));
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      imageCache.maximumSize = 3;
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      final TestImageInfo g = await extractOneFrame(const TestImageProvider(1, 7).resolve(ImageConfiguration.empty));
      expect(g.value, equals(7));
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      final TestImageInfo h = await extractOneFrame(const TestImageProvider(1, 8).resolve(ImageConfiguration.empty));
      expect(h.value, equals(7));
    });
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    test('Image cache resizing based on size', () async {
      const TestImage testImage = TestImage(width: 8, height: 8); // 256 B.
      imageCache.maximumSizeBytes = 256 * 2;
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      final TestImageInfo a = await extractOneFrame(const TestImageProvider(1, 1, image: testImage).resolve(ImageConfiguration.empty));
      final TestImageInfo b = await extractOneFrame(const TestImageProvider(2, 2, image: testImage).resolve(ImageConfiguration.empty));
      final TestImageInfo c = await extractOneFrame(const TestImageProvider(3, 3, image: testImage).resolve(ImageConfiguration.empty));
      final TestImageInfo d = await extractOneFrame(const TestImageProvider(1, 4, image: testImage).resolve(ImageConfiguration.empty));
      expect(a.value, equals(1));
      expect(b.value, equals(2));
      expect(c.value, equals(3));
      expect(d.value, equals(4));
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      imageCache.maximumSizeBytes = 0;
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      final TestImageInfo e = await extractOneFrame(const TestImageProvider(1, 5, image: testImage).resolve(ImageConfiguration.empty));
      expect(e.value, equals(5));
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      final TestImageInfo f = await extractOneFrame(const TestImageProvider(1, 6, image: testImage).resolve(ImageConfiguration.empty));
      expect(f.value, equals(6));
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      imageCache.maximumSizeBytes = 256 * 3;
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      final TestImageInfo g = await extractOneFrame(const TestImageProvider(1, 7, image: testImage).resolve(ImageConfiguration.empty));
      expect(g.value, equals(7));
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      final TestImageInfo h = await extractOneFrame(const TestImageProvider(1, 8, image: testImage).resolve(ImageConfiguration.empty));
      expect(h.value, equals(7));
    });
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  });
}