//
// Copyright (C) 2009 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#include "update_engine/file_writer.h"

#include <errno.h>
#include <string.h>
#include <unistd.h>

#include <string>
#include <vector>

#include <gtest/gtest.h>
#include <brillo/secure_blob.h>

#include "update_engine/test_utils.h"
#include "update_engine/utils.h"

using std::string;
using std::vector;

namespace chromeos_update_engine {

class FileWriterTest : public ::testing::Test { };

TEST(FileWriterTest, SimpleTest) {
  // Create a uniquely named file for testing.
  string path;
  ASSERT_TRUE(utils::MakeTempFile("FileWriterTest-XXXXXX", &path, nullptr));
  ScopedPathUnlinker path_unlinker(path);

  DirectFileWriter file_writer;
  EXPECT_EQ(0, file_writer.Open(path.c_str(),
                                O_CREAT | O_LARGEFILE | O_TRUNC | O_WRONLY,
                                0644));
  EXPECT_TRUE(file_writer.Write("test", 4));
  brillo::Blob actual_data;
  EXPECT_TRUE(utils::ReadFile(path, &actual_data));

  EXPECT_FALSE(memcmp("test", actual_data.data(), actual_data.size()));
  EXPECT_EQ(0, file_writer.Close());
}

TEST(FileWriterTest, ErrorTest) {
  DirectFileWriter file_writer;
  const string path("/tmp/ENOENT/FileWriterTest");
  EXPECT_EQ(-ENOENT, file_writer.Open(path.c_str(),
                                      O_CREAT | O_LARGEFILE | O_TRUNC, 0644));
}

TEST(FileWriterTest, WriteErrorTest) {
  // Create a uniquely named file for testing.
  string path;
  ASSERT_TRUE(utils::MakeTempFile("FileWriterTest-XXXXXX", &path, nullptr));
  ScopedPathUnlinker path_unlinker(path);

  DirectFileWriter file_writer;
  EXPECT_EQ(0, file_writer.Open(path.c_str(),
                                O_CREAT | O_LARGEFILE | O_TRUNC | O_RDONLY,
                                0644));
  EXPECT_FALSE(file_writer.Write("x", 1));
  EXPECT_EQ(0, file_writer.Close());
}


}  // namespace chromeos_update_engine