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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/thumbnail/cc/thumbnail_cache.h"
#include "base/memory/weak_ptr.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/task_environment.h"
#include "cc/resources/ui_resource_client.h"
#include "content/public/test/browser_task_environment.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/android/ui_android_export.h"
namespace thumbnail {
namespace {
constexpr int kKiB = 1024;
constexpr int kN32PixelSize = 4;
constexpr int kDefaultCacheSize = 3;
constexpr int kCompressionQueueMaxSize = 2;
constexpr int kWriteQueueMaxSize = 2;
class MockUIResourceProvider : public ui::UIResourceProvider {
public:
MOCK_METHOD(cc::UIResourceId,
CreateUIResource,
(cc::UIResourceClient*),
(override));
MOCK_METHOD(void, DeleteUIResource, (cc::UIResourceId), (override));
MOCK_METHOD(bool, SupportsETC1NonPowerOfTwo, (), (const, override));
base::WeakPtr<UIResourceProvider> GetWeakPtr() {
return weak_factory_.GetWeakPtr();
}
private:
base::WeakPtrFactory<MockUIResourceProvider> weak_factory_{this};
};
} // namespace
class ThumbnailCacheTest : public ::testing::Test {
protected:
void SetUp() override {
thumbnail_cache_ = std::make_unique<ThumbnailCache>(
kDefaultCacheSize, kCompressionQueueMaxSize, kWriteQueueMaxSize,
/*save_jpeg_thumbnails=*/true);
thumbnail_cache_->SetUIResourceProvider(ui_resource_provider_.GetWeakPtr());
EXPECT_CALL(ui_resource_provider_, CreateUIResource(::testing::_))
.WillRepeatedly(::testing::Return(1));
}
void TearDown() override {}
ThumbnailCache& thumbnail_cache() { return *thumbnail_cache_; }
void RecordCacheMetrics() { thumbnail_cache_->RecordCacheMetrics(); }
content::BrowserTaskEnvironment task_environment_;
private:
MockUIResourceProvider ui_resource_provider_;
std::unique_ptr<ThumbnailCache> thumbnail_cache_;
};
// TODO(crbug.com/40885026): Tests are being added in the process of refactoring
// and optimizing the ThumbnailCache for modern usage add more tests here.
TEST_F(ThumbnailCacheTest, PruneCache) {
constexpr int kTabId1 = 1;
constexpr int kTabId2 = 2;
constexpr int kDimension = 16;
SkBitmap bitmap;
ASSERT_TRUE(bitmap.tryAllocN32Pixels(kDimension * kKiB, kDimension));
bitmap.setImmutable();
thumbnail_cache().UpdateVisibleIds(std::vector<TabId>({kTabId1, kTabId2}),
-1);
EXPECT_TRUE(thumbnail_cache().CheckAndUpdateThumbnailMetaData(
kTabId1, GURL("https://www.foo.com/"), /*force_update=*/false));
std::unique_ptr<ThumbnailCaptureTracker, base::OnTaskRunnerDeleter> tracker1(
new ThumbnailCaptureTracker(base::DoNothing()),
base::OnTaskRunnerDeleter(
base::SequencedTaskRunner::GetCurrentDefault()));
thumbnail_cache().Put(kTabId1, std::move(tracker1), bitmap,
/*thumbnail_scale=*/1.0f);
EXPECT_TRUE(thumbnail_cache().CheckAndUpdateThumbnailMetaData(
kTabId2, GURL("https://www.bar.com/"), /*force_update=*/false));
std::unique_ptr<ThumbnailCaptureTracker, base::OnTaskRunnerDeleter> tracker2(
new ThumbnailCaptureTracker(base::DoNothing()),
base::OnTaskRunnerDeleter(
base::SequencedTaskRunner::GetCurrentDefault()));
thumbnail_cache().Put(kTabId2, std::move(tracker2), bitmap,
/*thumbnail_scale=*/1.0f);
EXPECT_TRUE(thumbnail_cache().Get(kTabId1, false));
EXPECT_TRUE(thumbnail_cache().Get(kTabId2, false));
thumbnail_cache().UpdateVisibleIds({kTabId1, kTabId2}, kTabId1);
EXPECT_TRUE(thumbnail_cache().Get(kTabId1, false));
EXPECT_TRUE(thumbnail_cache().Get(kTabId2, false));
thumbnail_cache().UpdateVisibleIds({kTabId1, kTabId2}, -1);
EXPECT_TRUE(thumbnail_cache().Get(kTabId1, false));
EXPECT_TRUE(thumbnail_cache().Get(kTabId2, false));
thumbnail_cache().UpdateVisibleIds({kTabId2}, kTabId1);
EXPECT_FALSE(thumbnail_cache().Get(kTabId1, false));
EXPECT_TRUE(thumbnail_cache().Get(kTabId2, false));
thumbnail_cache().UpdateVisibleIds({kTabId1}, kTabId1);
// The thumbnail will not be paged in yet although will be scheduled.
EXPECT_FALSE(thumbnail_cache().Get(kTabId1, false));
EXPECT_FALSE(thumbnail_cache().Get(kTabId2, false));
}
TEST_F(ThumbnailCacheTest, MetricsEmission) {
base::HistogramTester histograms;
histograms.ExpectTotalCount("Android.ThumbnailCache.InMemoryCacheEntries", 0);
histograms.ExpectTotalCount("Android.ThumbnailCache.InMemoryCacheSize", 0);
SkBitmap bitmap;
constexpr int kTabId = 4;
constexpr int kDimension = 4;
ASSERT_TRUE(bitmap.tryAllocN32Pixels(kDimension * kKiB, kDimension));
bitmap.setImmutable();
thumbnail_cache().UpdateVisibleIds(std::vector<TabId>({kTabId}), -1);
EXPECT_TRUE(thumbnail_cache().CheckAndUpdateThumbnailMetaData(
kTabId, GURL("https://www.foo.com/"), /*force_update=*/false));
std::unique_ptr<ThumbnailCaptureTracker, base::OnTaskRunnerDeleter> tracker(
new ThumbnailCaptureTracker(base::DoNothing()),
base::OnTaskRunnerDeleter(
base::SequencedTaskRunner::GetCurrentDefault()));
thumbnail_cache().Put(kTabId, std::move(tracker), bitmap,
/*thumbnail_scale=*/1.0f);
RecordCacheMetrics();
histograms.ExpectTotalCount("Android.ThumbnailCache.InMemoryCacheEntries", 1);
histograms.ExpectTotalCount("Android.ThumbnailCache.InMemoryCacheSize", 1);
histograms.ExpectUniqueSample("Android.ThumbnailCache.InMemoryCacheEntries",
1, 1);
histograms.ExpectUniqueSample("Android.ThumbnailCache.InMemoryCacheSize",
kDimension * kDimension * kN32PixelSize, 1);
}
TEST_F(ThumbnailCacheTest, InvalidateIfChanged) {
constexpr int kTabId1 = 1;
constexpr int kDimension = 16;
SkBitmap bitmap;
ASSERT_TRUE(bitmap.tryAllocN32Pixels(kDimension * kKiB, kDimension));
bitmap.setImmutable();
thumbnail_cache().UpdateVisibleIds(std::vector<TabId>({kTabId1}), -1);
GURL url("https://www.foo.com/");
EXPECT_TRUE(thumbnail_cache().CheckAndUpdateThumbnailMetaData(
kTabId1, url, /*force_update=*/false));
std::unique_ptr<ThumbnailCaptureTracker, base::OnTaskRunnerDeleter> tracker1(
new ThumbnailCaptureTracker(base::DoNothing()),
base::OnTaskRunnerDeleter(
base::SequencedTaskRunner::GetCurrentDefault()));
thumbnail_cache().Put(kTabId1, std::move(tracker1), bitmap,
/*thumbnail_scale=*/1.0f);
EXPECT_TRUE(thumbnail_cache().Get(kTabId1, false));
thumbnail_cache().InvalidateThumbnailIfChanged(kTabId1, url);
EXPECT_TRUE(thumbnail_cache().Get(kTabId1, false));
thumbnail_cache().InvalidateThumbnailIfChanged(kTabId1, GURL());
EXPECT_TRUE(thumbnail_cache().Get(kTabId1, false));
thumbnail_cache().InvalidateThumbnailIfChanged(kTabId1,
GURL("https://www.bar.com/"));
EXPECT_FALSE(thumbnail_cache().Get(kTabId1, false));
}
} // namespace thumbnail
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