File i18nFile = getTestFile("i18n.txt");
    StringBuilder sb = new StringBuilder();
    Files.copy(i18nFile, UTF_8, sb);
    assertThat(sb.toString()).isEqualTo(I18N);
  }

  public void testCopyFile() throws IOException {
    File i18nFile = getTestFile("i18n.txt");
    File temp = createTempFile();
    Files.copy(i18nFile, temp);
    assertThat(Files.toString(temp, UTF_8)).isEqualTo(I18N);
  }