@Test(expected = DecisionTableParseException.class)
public void checkConversionOfXLSWithInvalidContent() {

    final InputStream is = this.getClass().getResourceAsStream("wrong_file.xls");
    when(ioService.newInputStream(any(org.uberfire.java.nio.file.Path.class))).thenReturn(is);
    converter.convert(path);
}