Function TEST

test/file_unittest.cc:14–99

using butil::FilePath;

TEST(FileTest, Create) {
  butil::ScopedTempDir temp_dir;
  ASSERT_TRUE(temp_dir.CreateUniqueTempDir());
  FilePath file_path = temp_dir.path().AppendASCII("create_file_1");

  {
    // Don't create a File at all.
    File file;
    EXPECT_FALSE(file.IsValid());
    EXPECT_EQ(butil::File::FILE_ERROR_FAILED, file.error_details());

    File file2(butil::File::FILE_ERROR_TOO_MANY_OPENED);
    EXPECT_FALSE(file2.IsValid());
    EXPECT_EQ(butil::File::FILE_ERROR_TOO_MANY_OPENED, file2.error_details());
  }

  {
    // Open a file that doesn't exist.
    File file(file_path, butil::File::FLAG_OPEN | butil::File::FLAG_READ);
    EXPECT_FALSE(file.IsValid());
    EXPECT_EQ(butil::File::FILE_ERROR_NOT_FOUND, file.error_details());
  }

  {
    // Open or create a file.
    File file(file_path, butil::File::FLAG_OPEN_ALWAYS | butil::File::FLAG_READ);
    EXPECT_TRUE(file.IsValid());
    EXPECT_TRUE(file.created());
    EXPECT_EQ(butil::File::FILE_OK, file.error_details());
  }

  {
    // Open an existing file.
    File file(file_path, butil::File::FLAG_OPEN | butil::File::FLAG_READ);
    EXPECT_TRUE(file.IsValid());
    EXPECT_FALSE(file.created());
    EXPECT_EQ(butil::File::FILE_OK, file.error_details());

    // This time verify closing the file.
    file.Close();
    EXPECT_FALSE(file.IsValid());
  }

  {
    // Open an existing file through Initialize
    File file;
    file.Initialize(file_path, butil::File::FLAG_OPEN | butil::File::FLAG_READ);
    EXPECT_TRUE(file.IsValid());
    EXPECT_FALSE(file.created());
    EXPECT_EQ(butil::File::FILE_OK, file.error_details());

    // This time verify closing the file.
    file.Close();
    EXPECT_FALSE(file.IsValid());
  }

  {
    // Create a file that exists.