image_cache_resize_test.dart 3.84 KB
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// Copyright 2014 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
// found in the LICENSE file.

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import 'dart:ui' as ui;

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import 'package:flutter/painting.dart';
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import 'package:flutter_test/flutter_test.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.ensureInitialized();
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  tearDown(() {
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    imageCache
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      ..clear()
      ..maximumSize = 1000
      ..maximumSizeBytes = 10485760;
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  });

  test('Image cache resizing based on count', () async {
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    imageCache.maximumSize = 2;
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    final TestImageInfo a = await extractOneFrame(TestImageProvider(1, 1, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
    final TestImageInfo b = await extractOneFrame(TestImageProvider(2, 2, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
    final TestImageInfo c = await extractOneFrame(TestImageProvider(3, 3, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
    final TestImageInfo d = await extractOneFrame(TestImageProvider(1, 4, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    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(TestImageProvider(1, 5, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(e.value, equals(5));
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    final TestImageInfo f = await extractOneFrame(TestImageProvider(1, 6, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(f.value, equals(6));
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    imageCache.maximumSize = 3;
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    final TestImageInfo g = await extractOneFrame(TestImageProvider(1, 7, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(g.value, equals(7));
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    final TestImageInfo h = await extractOneFrame(TestImageProvider(1, 8, image: await createTestImage()).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(h.value, equals(7));
  });
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  test('Image cache resizing based on size', () async {
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    final ui.Image testImage = await createTestImage(width: 8, height: 8); // 256 B.
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    imageCache.maximumSizeBytes = 256 * 2;
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    final TestImageInfo a = await extractOneFrame(TestImageProvider(1, 1, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
    final TestImageInfo b = await extractOneFrame(TestImageProvider(2, 2, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
    final TestImageInfo c = await extractOneFrame(TestImageProvider(3, 3, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
    final TestImageInfo d = await extractOneFrame(TestImageProvider(1, 4, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    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(TestImageProvider(1, 5, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(e.value, equals(5));
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    final TestImageInfo f = await extractOneFrame(TestImageProvider(1, 6, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(f.value, equals(6));
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    imageCache.maximumSizeBytes = 256 * 3;
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    final TestImageInfo g = await extractOneFrame(TestImageProvider(1, 7, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(g.value, equals(7));
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    final TestImageInfo h = await extractOneFrame(TestImageProvider(1, 8, image: testImage).resolve(ImageConfiguration.empty)) as TestImageInfo;
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    expect(h.value, equals(7));
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  });
}