@Test(expected = DecisionTableParseException.class)
public void testValidateFileWithInvalidContent() throws IOException {

    this.service = getServiceWithValidationOverride(null);
    File tempFile = File.createTempFile("emptyxls", null);
    try (FileOutputStream tempFOS = new FileOutputStream(tempFile)) {
        IOUtils.write("birdplane!", tempFOS);
        tempFOS.flush();
        service.validate(tempFile);
    }
}