// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/update_client/puffin_patcher.h"

#include "base/base_paths.h"
#include "base/feature_list.h"
#include "base/files/file_path.h"
#include "base/files/file_util.h"
#include "base/files/scoped_temp_dir.h"
#include "base/functional/bind.h"
#include "base/memory/scoped_refptr.h"
#include "base/path_service.h"
#include "base/run_loop.h"
#include "base/sequence_checker.h"
#include "base/test/bind.h"
#include "base/test/task_environment.h"
#include "build/build_config.h"
#include "components/services/patch/in_process_file_patcher.h"
#include "components/update_client/features.h"
#include "components/update_client/patch/patch_impl.h"
#include "components/update_client/test_installer.h"
#include "components/update_client/test_utils.h"
#include "components/update_client/update_client_errors.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace update_client {

class PuffinPatcherTest : public testing::Test {
 public:
  PuffinPatcherTest() = default;
  ~PuffinPatcherTest() override = default;

 protected:
  base::test::TaskEnvironment env_;
};

TEST_F(PuffinPatcherTest, CheckPuffPatch) {
  if (!base::FeatureList::IsEnabled(features::kPuffinPatches)) {
    GTEST_SKIP() << "only works when PuffinPatches are enabled.";
  }
  // The operation needs a Patcher to access the PatchService.
  scoped_refptr<Patcher> patcher =
      base::MakeRefCounted<PatchChromiumFactory>(
          base::BindRepeating(&patch::LaunchInProcessFilePatcher))
          ->Create();
  base::ScopedTempDir temp_dir;
  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
  base::FilePath v1_to_v2_out_file =
      temp_dir.GetPath().AppendASCII("puffin_app_v1_to_v2.crx3");
  SEQUENCE_CHECKER(sequence_checker);
  {
    base::File input_file(
        GetTestFilePath("puffin_patch_test/puffin_app_v1.crx3"),
        base::File::FLAG_OPEN | base::File::FLAG_READ);
    base::File patch_file(
        GetTestFilePath("puffin_patch_test/puffin_app_v1_to_v2.puff"),
        base::File::FLAG_OPEN | base::File::FLAG_READ);
    base::File output_file(v1_to_v2_out_file,
                           base::File::FLAG_CREATE | base::File::FLAG_WRITE |
                               base::File::FLAG_WIN_EXCLUSIVE_WRITE);
    base::RunLoop loop;
    PuffinPatcher::Patch(
        std::move(input_file), std::move(patch_file), std::move(output_file),
        patcher,
        base::BindLambdaForTesting([&](UnpackerError error, int extra_code) {
          DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker);
          EXPECT_EQ(error, UnpackerError::kNone);
          EXPECT_EQ(extra_code, 0);
          loop.Quit();
        }));
    loop.Run();
  }

  EXPECT_TRUE(base::ContentsEqual(
      GetTestFilePath("puffin_patch_test/puffin_app_v2.crx3"),
      v1_to_v2_out_file));

  base::FilePath v2_to_v1_out_file =
      temp_dir.GetPath().AppendASCII("puffin_app_v2_to_v1.crx3");
  {
    base::File input_file(
        GetTestFilePath("puffin_patch_test/puffin_app_v2.crx3"),
        base::File::FLAG_OPEN | base::File::FLAG_READ);
    base::File patch_file(
        GetTestFilePath("puffin_patch_test/puffin_app_v2_to_v1.puff"),
        base::File::FLAG_OPEN | base::File::FLAG_READ);
    base::File output_file(v2_to_v1_out_file,
                           base::File::FLAG_CREATE | base::File::FLAG_WRITE |
                               base::File::FLAG_WIN_EXCLUSIVE_WRITE);
    base::RunLoop loop;
    PuffinPatcher::Patch(
        std::move(input_file), std::move(patch_file), std::move(output_file),
        patcher,
        base::BindLambdaForTesting([&](UnpackerError error, int extra_code) {
          DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker);
          EXPECT_EQ(error, UnpackerError::kNone);
          EXPECT_EQ(extra_code, 0);
          loop.Quit();
        }));
    loop.Run();
  }

  DETACH_FROM_SEQUENCE(sequence_checker);
  EXPECT_TRUE(base::ContentsEqual(
      GetTestFilePath("puffin_patch_test/puffin_app_v1.crx3"),
      v2_to_v1_out_file));
  EXPECT_TRUE(base::DeletePathRecursively(temp_dir.GetPath()));
}

}  // namespace update_client