}

    @Override
    public boolean delete() {
      return canDelete && super.delete();
    }

    private static final long serialVersionUID = 0;
  }

  public void testLineReading() throws IOException {
    File temp = createTempFile();
    assertThat(Files.readFirstLine(temp, UTF_8)).isNull();
    assertTrue(Files.readLines(temp, UTF_8).isEmpty());