// Copyright (c) 2012 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 "webkit/fileapi/quota_file_util.h"

#include <string>

#include "base/file_path.h"
#include "base/message_loop_proxy.h"
#include "base/platform_file.h"
#include "base/scoped_temp_dir.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "webkit/fileapi/file_system_context.h"
#include "webkit/fileapi/file_system_operation_context.h"
#include "webkit/fileapi/file_system_test_helper.h"
#include "webkit/fileapi/file_system_types.h"
#include "webkit/fileapi/file_system_usage_cache.h"
#include "webkit/fileapi/file_util_helper.h"

namespace fileapi {

class QuotaFileUtilTest : public testing::Test {
 public:
  QuotaFileUtilTest() {}

  void SetUp() {
    ASSERT_TRUE(data_dir_.CreateUniqueTempDir());
    quota_file_util_.reset(QuotaFileUtil::CreateDefault());
    quota_test_helper_.SetUp(data_dir_.path(), quota_file_util_.get());
    base_dir_ = quota_test_helper_.GetOriginRootPath();
  }

  void TearDown() {
    quota_test_helper_.TearDown();
  }

 protected:
  FileSystemOperationContext* NewContext() {
    return quota_test_helper_.NewOperationContext();
  }

  FileSystemPath Path(const std::string& file_name) {
    return quota_test_helper_.CreatePath(base_dir_.AppendASCII(file_name));
  }

  base::PlatformFileError CreateFile(const char* file_name,
      base::PlatformFile* file_handle, bool* created) {
    int file_flags = base::PLATFORM_FILE_CREATE |
        base::PLATFORM_FILE_WRITE | base::PLATFORM_FILE_ASYNC;

    scoped_ptr<FileSystemOperationContext> context(NewContext());
    return quota_file_util()->CreateOrOpen(
        context.get(), Path(file_name), file_flags, file_handle, created);
  }

  base::PlatformFileError EnsureFileExists(
      const char* file_name, bool* created) {
    scoped_ptr<FileSystemOperationContext> context(NewContext());
    return quota_file_util_->EnsureFileExists(
        context.get(), Path(file_name), created);
  }

  QuotaFileUtil* quota_file_util() const {
    return quota_file_util_.get();
  }

  const FileSystemTestOriginHelper& quota_test_helper() const {
    return quota_test_helper_;
  }

 private:
  ScopedTempDir data_dir_;
  FilePath base_dir_;
  FileSystemTestOriginHelper quota_test_helper_;
  scoped_ptr<QuotaFileUtil> quota_file_util_;

  DISALLOW_COPY_AND_ASSIGN(QuotaFileUtilTest);
};

TEST_F(QuotaFileUtilTest, CreateAndClose) {
  const char *file_name = "test_file";
  base::PlatformFile file_handle;
  bool created;
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            CreateFile(file_name, &file_handle, &created));
  ASSERT_TRUE(created);

  scoped_ptr<FileSystemOperationContext> context(NewContext());
  EXPECT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->Close(context.get(), file_handle));
}

TEST_F(QuotaFileUtilTest, CopyFile) {
  const char *from_file = "fromfile";
  const char *obstacle_file = "obstaclefile";
  const char *to_file1 = "tofile1";
  const char *to_file2 = "tofile2";
  bool created;
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file, &created));
  ASSERT_TRUE(created);
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(obstacle_file, &created));
  ASSERT_TRUE(created);
  scoped_ptr<FileSystemOperationContext> context;

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file), 1020));
  ASSERT_EQ(1020, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(obstacle_file), 1));
  ASSERT_EQ(1021, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(1020);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilCopy(
                context.get(),
                Path(from_file),
                Path(to_file1)));
  ASSERT_EQ(2041, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(1019);
  ASSERT_EQ(base::PLATFORM_FILE_ERROR_NO_SPACE,
            quota_test_helper().SameFileUtilCopy(
                context.get(),
                Path(from_file),
                Path(to_file2)));
  ASSERT_EQ(2041, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(1019);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilCopy(
                context.get(),
                Path(from_file),
                Path(obstacle_file)));
  ASSERT_EQ(3060, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file), 1019));
  ASSERT_EQ(3059, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(-2);  // quota exceeded
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilCopy(
                context.get(),
                Path(from_file),
                Path(obstacle_file)));
  ASSERT_EQ(3058, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());
}

TEST_F(QuotaFileUtilTest, CopyDirectory) {
  const char *from_dir = "fromdir";
  const char *from_file1 = "fromdir/fromfile1";
  const char *from_file2 = "fromdir/fromfile2";
  const char *to_dir1 = "todir1";
  const char *to_dir2 = "todir2";
  bool created;
  scoped_ptr<FileSystemOperationContext> context;

  context.reset(NewContext());
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->CreateDirectory(context.get(),
                                               Path(from_dir),
                                               false, false));
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file1, &created));
  ASSERT_TRUE(created);
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file2, &created));
  ASSERT_TRUE(created);

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file1), 520));
  ASSERT_EQ(520, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file2), 500));
  ASSERT_EQ(1020, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(1020);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilCopy(
                context.get(),
                Path(from_dir),
                Path(to_dir1)));
  ASSERT_EQ(2040, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(1019);
  EXPECT_EQ(base::PLATFORM_FILE_ERROR_NO_SPACE,
            quota_test_helper().SameFileUtilCopy(
                context.get(),
                Path(from_dir),
                Path(to_dir2)));
  ASSERT_TRUE(2540 == quota_test_helper().GetCachedOriginUsage() ||
              2560 == quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());
}

TEST_F(QuotaFileUtilTest, MoveFile) {
  const char *from_file = "fromfile";
  const char *obstacle_file = "obstaclefile";
  const char *to_file = "tofile";
  bool created;
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file, &created));
  ASSERT_TRUE(created);
  scoped_ptr<FileSystemOperationContext> context;

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file), 1020));
  ASSERT_EQ(1020, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(0);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilMove(
                context.get(),
                Path(from_file),
                Path(to_file)));
  ASSERT_EQ(1020, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file, &created));
  ASSERT_TRUE(created);
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(obstacle_file, &created));
  ASSERT_TRUE(created);

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file), 1020));
  ASSERT_EQ(2040, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(obstacle_file), 1));
  ASSERT_EQ(2041, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(0);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilMove(
                context.get(),
                Path(from_file),
                Path(obstacle_file)));
  ASSERT_EQ(2040, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file, &created));
  ASSERT_TRUE(created);

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file), 10));
  ASSERT_EQ(2050, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(-1020 - 1);  // quota exceeded, after
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilMove(
                context.get(),
                Path(from_file),
                Path(obstacle_file)));
  ASSERT_EQ(1030, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());
}

TEST_F(QuotaFileUtilTest, MoveDirectory) {
  const char *from_dir = "fromdir";
  const char *from_file = "fromdir/fromfile";
  const char *to_dir1 = "todir1";
  const char *to_dir2 = "todir2";
  bool created;
  scoped_ptr<FileSystemOperationContext> context;

  context.reset(NewContext());
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->CreateDirectory(context.get(),
                                               Path(from_dir),
                                               false, false));
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file, &created));
  ASSERT_TRUE(created);

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file), 1020));
  ASSERT_EQ(1020, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(1020);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilMove(
                context.get(),
                Path(from_dir),
                Path(to_dir1)));
  ASSERT_EQ(1020, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->CreateDirectory(context.get(),
                                               Path(from_dir),
                                               false, false));
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(from_file, &created));
  ASSERT_TRUE(created);

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(from_file), 1020));
  ASSERT_EQ(2040, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(1019);
  EXPECT_EQ(base::PLATFORM_FILE_OK,
            quota_test_helper().SameFileUtilMove(
                context.get(),
                Path(from_dir),
                Path(to_dir2)));
  ASSERT_EQ(2040, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());
}

TEST_F(QuotaFileUtilTest, Remove) {
  const char *dir = "dir";
  const char *file = "file";
  const char *dfile1 = "dir/dfile1";
  const char *dfile2 = "dir/dfile2";
  bool created;
  scoped_ptr<FileSystemOperationContext> context;

  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(file, &created));
  ASSERT_TRUE(created);
  context.reset(NewContext());
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->CreateDirectory(context.get(),
                                               Path(dir),
                                               false, false));
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(dfile1, &created));
  ASSERT_TRUE(created);
  ASSERT_EQ(base::PLATFORM_FILE_OK, EnsureFileExists(dfile2, &created));
  ASSERT_TRUE(created);

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(file), 340));
  ASSERT_EQ(340, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(dfile1), 1020));
  ASSERT_EQ(1360, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            quota_file_util()->TruncateInternal(
                context.get(), Path(dfile2), 120));
  ASSERT_EQ(1480, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            FileUtilHelper::Delete(context.get(), quota_file_util(),
                                   Path(file), false));
  ASSERT_EQ(1140, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());

  context.reset(NewContext());
  context->set_allowed_bytes_growth(QuotaFileUtil::kNoLimit);
  ASSERT_EQ(base::PLATFORM_FILE_OK,
            FileUtilHelper::Delete(context.get(), quota_file_util(),
                                   Path(dir), true));
  ASSERT_EQ(0, quota_test_helper().GetCachedOriginUsage());
  ASSERT_EQ(quota_test_helper().ComputeCurrentOriginUsage(),
            quota_test_helper().GetCachedOriginUsage());
}

}  // namespace fileapi