// 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 "base/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.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_util_helper.h"
#include "webkit/fileapi/local_file_system_test_helper.h"
#include "webkit/fileapi/native_file_util.h"
#include "webkit/fileapi/obfuscated_file_util.h"
#include "webkit/fileapi/test_file_set.h"

namespace fileapi {

// This is not yet a full unit test for FileSystemFileUtil.  TODO(ericu): Adapt
// the other subclasses' unit tests, as mentioned in the comments in
// ObfuscatedFileUtil's unit test.
// Currently this is just a test of cross-filesystem copy and move, which
// actually exercises subclasses of FileSystemFileUtil as well as the class
// itself.  We currently only test copies between obfuscated filesystems.
// TODO(ericu): Add a test for copying between obfuscated and local filesystems,
// and between different local filesystems.
class FileSystemFileUtilTest : public testing::Test {
 public:
  FileSystemFileUtilTest() {
  }

  void SetUp() {
  }

  FileSystemOperationContext* NewContext(
      LocalFileSystemTestOriginHelper* helper) {
    FileSystemOperationContext* context = helper->NewOperationContext();
    // We need to allocate quota for paths for
    // TestCrossFileSystemCopyMoveHelper, since it calls into OFSFU, which
    // charges quota for paths.
    context->set_allowed_bytes_growth(1024 * 1024);
    return context;
  }

  void TestCrossFileSystemCopyMoveHelper(
      const GURL& src_origin, fileapi::FileSystemType src_type,
      const GURL& dest_origin, fileapi::FileSystemType dest_type,
      bool copy) {
    ScopedTempDir base_dir;
    ASSERT_TRUE(base_dir.CreateUniqueTempDir());
    scoped_ptr<ObfuscatedFileUtil> file_util(
        new ObfuscatedFileUtil(base_dir.path()));
    LocalFileSystemTestOriginHelper src_helper(src_origin, src_type);
    src_helper.SetUp(base_dir.path(),
                     false,  // unlimited quota
                     NULL,  // quota::QuotaManagerProxy
                     file_util.get());

    LocalFileSystemTestOriginHelper dest_helper(dest_origin, dest_type);
    dest_helper.SetUp(src_helper.file_system_context(), file_util.get());

    // Set up all the source data.
    scoped_ptr<FileSystemOperationContext> context;
    FileSystemURL src_root = src_helper.CreateURLFromUTF8("root directory");

    for (size_t i = 0; i < test::kRegularTestCaseSize; ++i) {
      const test::TestCaseRecord& test_case = test::kRegularTestCases[i];
      FileSystemURL url = src_root.WithPath(
          src_root.path().Append(test_case.path));
      if (test_case.is_directory) {
        context.reset(NewContext(&src_helper));
        ASSERT_EQ(base::PLATFORM_FILE_OK,
            file_util->CreateDirectory(context.get(), url, true, true));
      } else {
        context.reset(NewContext(&src_helper));
        bool created = false;
        ASSERT_EQ(base::PLATFORM_FILE_OK,
            file_util->EnsureFileExists(context.get(), url, &created));
        ASSERT_TRUE(created);
        context.reset(NewContext(&src_helper));
        ASSERT_EQ(base::PLATFORM_FILE_OK, file_util->Truncate(
            context.get(), url, test_case.data_file_size));
      }
    }

    FileSystemURL dest_root = dest_helper.CreateURLFromUTF8("root directory");

    // Do the actual copy or move.
    scoped_ptr<FileSystemOperationContext> copy_context(
        src_helper.NewOperationContext());
    copy_context->set_allowed_bytes_growth(1024 * 1024);  // OFSFU path quota.

    if (copy) {
      ASSERT_EQ(
          base::PLATFORM_FILE_OK,
          FileUtilHelper::Copy(
              copy_context.get(),
              src_helper.file_util(), dest_helper.file_util(),
              src_root, dest_root));
    } else {
      ASSERT_EQ(
          base::PLATFORM_FILE_OK,
          FileUtilHelper::Move(
              copy_context.get(),
              src_helper.file_util(), dest_helper.file_util(),
              src_root, dest_root));
    }

    // Validate that the destination paths are correct.
    for (size_t i = 0; i < test::kRegularTestCaseSize; ++i) {
      const test::TestCaseRecord& test_case = test::kRegularTestCases[i];
      FileSystemURL url = dest_root.WithPath(
          dest_root.path().Append(test_case.path));

      base::PlatformFileInfo dest_file_info;
      FilePath data_path;
      context.reset(NewContext(&dest_helper));
      EXPECT_EQ(base::PLATFORM_FILE_OK,
          file_util->GetFileInfo(
              context.get(), url, &dest_file_info, &data_path));
      if (test_case.is_directory) {
        EXPECT_TRUE(dest_file_info.is_directory);
      } else {
        base::PlatformFileInfo platform_file_info;
        ASSERT_TRUE(file_util::GetFileInfo(data_path, &platform_file_info));
        EXPECT_EQ(test_case.data_file_size, platform_file_info.size);
        EXPECT_FALSE(platform_file_info.is_directory);
        EXPECT_EQ(platform_file_info.size, dest_file_info.size);
        EXPECT_FALSE(dest_file_info.is_directory);
      }
    }

    // Validate that the source paths are still there [for a copy] or gone [for
    // a move].
    for (size_t i = 0; i < test::kRegularTestCaseSize; ++i) {
      const test::TestCaseRecord& test_case = test::kRegularTestCases[i];
      FileSystemURL url = src_root.WithPath(
          src_root.path().Append(test_case.path));
      base::PlatformFileInfo src_file_info;
      FilePath data_path;
      context.reset(NewContext(&src_helper));
      base::PlatformFileError expected_result;
      if (copy)
        expected_result = base::PLATFORM_FILE_OK;
      else
        expected_result = base::PLATFORM_FILE_ERROR_NOT_FOUND;
      EXPECT_EQ(expected_result,
          file_util->GetFileInfo(
              context.get(), url, &src_file_info, &data_path));
    }
  }

 private:
  MessageLoop message_loop_;
  DISALLOW_COPY_AND_ASSIGN(FileSystemFileUtilTest);
};

TEST_F(FileSystemFileUtilTest, TestCrossFileSystemCopyDifferentOrigins) {
  GURL src_origin("http://www.example.com");
  fileapi::FileSystemType type = kFileSystemTypePersistent;
  GURL dest_origin("http://www.not.the.same.domain.com");

  TestCrossFileSystemCopyMoveHelper(src_origin, type, dest_origin, type, true);
}

TEST_F(FileSystemFileUtilTest, TestCrossFileSystemCopySameOrigin) {
  GURL origin("http://www.example.com");
  fileapi::FileSystemType src_type = kFileSystemTypePersistent;
  fileapi::FileSystemType dest_type = kFileSystemTypeTemporary;

  TestCrossFileSystemCopyMoveHelper(origin, src_type, origin, dest_type, true);
}

TEST_F(FileSystemFileUtilTest, TestCrossFileSystemMoveDifferentOrigins) {
  GURL src_origin("http://www.example.com");
  fileapi::FileSystemType type = kFileSystemTypePersistent;
  GURL dest_origin("http://www.not.the.same.domain.com");

  TestCrossFileSystemCopyMoveHelper(src_origin, type, dest_origin, type, false);
}

TEST_F(FileSystemFileUtilTest, TestCrossFileSystemMoveSameOrigin) {
  GURL origin("http://www.example.com");
  fileapi::FileSystemType src_type = kFileSystemTypePersistent;
  fileapi::FileSystemType dest_type = kFileSystemTypeTemporary;

  TestCrossFileSystemCopyMoveHelper(origin, src_type, origin, dest_type, false);
}

}  // namespace fileapi