assertThat(result, is(urlString.length()));
        assertThat(writer.toString(), is(urlString));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testFileToFile() throws Exception {
        int result = copy(inputFile, outputFile);
        assertThat(result, is(urlString.getBytes("UTF-8").length));

        result = copy(outputFile, "UTF-8", writer);

    File inputFile = URLUtil.toFile(url);

    @Rule
    public TemporaryFolder tempFolder = new TemporaryFolder();

    /**
     * @throws Exception
     */
    @Test
    public void testFileToFile() throws Exception {
        final byte[] bytes = readBytes(inputFile);
        assertThat(bytes, is("あいうえお".getBytes("UTF-8")));
    }

    /**
     * @throws Exception
     */
    @Test