text: // Copyright 2014 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.
  
  #include "storage/browser/file_system/file_system_usage_cache.h"
  
  #include <stdint.h>
  
  #include <limits>
  
  #include "base/files/file_util.h"
  #include "base/files/scoped_temp_dir.h"
  #include "base/macros.h"
  #include "base/test/task_environment.h"
  #include "testing/gtest/include/gtest/gtest.h"
  
  namespace storage {
  
  class FileSystemUsageCacheTest : public testing::Test,
                                   public ::testing::WithParamInterface<bool> {
   public:
    FileSystemUsageCacheTest() : usage_cache_(is_incognito()) {}
  
    FileSystemUsageCacheTest(const FileSystemUsageCacheTest&) = delete;
    FileSystemUsageCacheTest& operator=(const FileSystemUsageCacheTest&) = delete;
  
    void SetUp() override { ASSERT_TRUE(data_dir_.CreateUniqueTempDir()); }
  
    bool is_incognito() { return GetParam(); }
  
   protected:
    base::FilePath GetUsageFilePath() {
      return data_dir_.GetPath().Append(FileSystemUsageCache::kUsageFileName);
    }
  
    FileSystemUsageCache* usage_cache() { return &usage_cache_; }
  
   private:
    base::test::SingleThreadTaskEnvironment task_environment_;
    base::ScopedTempDir data_dir_;
    FileSystemUsageCache usage_cache_;
  };
  
  INSTANTIATE_TEST_SUITE_P(All, FileSystemUsageCacheTest, testing::Bool());
  
  TEST_P(FileSystemUsageCacheTest, CreateTest) {
    base::FilePath usage_file_path = GetUsageFilePath();
    EXPECT_TRUE(usage_cache()->UpdateUsage(usage_file_path, 0));
  }
  
  TEST_P(FileSystemUsageCacheTest, SetSizeTest) {
    static const int64_t size = 240122;
    base::FilePath usage_file_path = GetUsageFilePath();
    int64_t usage = 0;
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, size));
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(size, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, SetLargeSizeTest) {
    static const int64_t size = std::numeric_limits<int64_t>::max();
    base::FilePath usage_file_path = GetUsageFilePath();
    int64_t usage = 0;
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, size));
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(size, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, IncAndGetSizeTest) {
    base::FilePath usage_file_path = GetUsageFilePath();
    uint32_t dirty = 0;
    int64_t usage = 0;
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, 98214));
    ASSERT_TRUE(usage_cache()->IncrementDirty(usage_file_path));
    EXPECT_TRUE(usage_cache()->GetDirty(usage_file_path, &dirty));
    EXPECT_EQ(1u, dirty);
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(98214, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, DecAndGetSizeTest) {
    static const int64_t size = 71839;
    base::FilePath usage_file_path = GetUsageFilePath();
    int64_t usage = 0;
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, size));
    // DecrementDirty for dirty = 0 is invalid. It returns false.
    ASSERT_FALSE(usage_cache()->DecrementDirty(usage_file_path));
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(size, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, IncDecAndGetSizeTest) {
    static const int64_t size = 198491;
    base::FilePath usage_file_path = GetUsageFilePath();
    int64_t usage = 0;
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, size));
    ASSERT_TRUE(usage_cache()->IncrementDirty(usage_file_path));
    ASSERT_TRUE(usage_cache()->DecrementDirty(usage_file_path));
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(size, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, DecIncAndGetSizeTest) {
    base::FilePath usage_file_path = GetUsageFilePath();
    uint32_t dirty = 0;
    int64_t usage = 0;
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, 854238));
    // DecrementDirty for dirty = 0 is invalid. It returns false.
    ASSERT_FALSE(usage_cache()->DecrementDirty(usage_file_path));
    ASSERT_TRUE(usage_cache()->IncrementDirty(usage_file_path));
    // It tests DecrementDirty (which returns false) has no effect, i.e
    // does not make dirty = -1 after DecrementDirty.
    EXPECT_TRUE(usage_cache()->GetDirty(usage_file_path, &dirty));
    EXPECT_EQ(1u, dirty);
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(854238, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, ManyIncsSameDecsAndGetSizeTest) {
    static const int64_t size = 82412;
    base::FilePath usage_file_path = GetUsageFilePath();
    int64_t usage = 0;
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, size));
    for (int i = 0; i < 20; i++)
      ASSERT_TRUE(usage_cache()->IncrementDirty(usage_file_path));
    for (int i = 0; i < 20; i++)
      ASSERT_TRUE(usage_cache()->DecrementDirty(usage_file_path));
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(size, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, ManyIncsLessDecsAndGetSizeTest) {
    uint32_t dirty = 0;
    int64_t usage = 0;
    base::FilePath usage_file_path = GetUsageFilePath();
    ASSERT_TRUE(usage_cache()->UpdateUsage(usage_file_path, 19319));
    for (int i = 0; i < 20; i++)
      ASSERT_TRUE(usage_cache()->IncrementDirty(usage_file_path));
    for (int i = 0; i < 19; i++)
      ASSERT_TRUE(usage_cache()->DecrementDirty(usage_file_path));
    EXPECT_TRUE(usage_cache()->GetDirty(usage_file_path, &dirty));
    EXPECT_EQ(1u, dirty);
    EXPECT_TRUE(usage_cache()->GetUsage(usage_file_path, &usage));
    EXPECT_EQ(19319, usage);
  }
  
  TEST_P(FileSystemUsageCacheTest, GetSizeWithoutCacheFileTest) {
    int64_t usage = 0;
    base::FilePath usage_file_path = GetUsageFilePath();
    EXPECT_FALSE(usage_cache()->GetUsage(usage_file_path, &usage));
  }
  
  TEST_P(FileSystemUsageCacheTest, IncrementDirtyWithoutCacheFileTest) {
    base::FilePath usage_file_path = GetUsageFilePath();
    EXPECT_FALSE(usage_cache()->IncrementDirty(usage_file_path));
  }
  
  TEST_P(FileSystemUsageCacheTest, DecrementDirtyWithoutCacheFileTest) {
    base::FilePath usage_file_path = GetUsageFilePath();
    EXPECT_FALSE(usage_cache()->IncrementDirty(usage_file_path));
  }
  
  }  // namespace storage
  