code: @Test public void should_fail_if_file_does_not_have_expected_binary_content() throws IOException {
    BinaryDiffResult diff=new BinaryDiffResult(15,(byte)0xCA,(byte)0xFE);
    when(binaryDiff.diff(actual,expected)).thenReturn(diff);
    AssertionInfo info=someInfo();
    try {
      files.assertHasBinaryContent(info,actual,expected);
    }
   catch (  AssertionError e) {
      verify(failures).failure(info,shouldHaveBinaryContent(actual,diff));
      return;
    }
    failBecauseExpectedAssertionErrorWasNotThrown();
  }
  