@Test(expected = PreprocessingException.class)
public void evaluateTest_differentWidth() {

    BufferedImage left = BufferedImageHelper.createSolidImage(new Color(0, 0, 0), 500, 500);
    BufferedImage right = BufferedImageHelper.createSolidImage(new Color(0, 0, 0), 400, 500);
    EqualQa equalQa = new EqualQa();
    TransientOperation<Boolean, Boolean> op = equalQa.evaluate(left, right);
}