@Test
public void executeTest_equalSize() {

    BufferedImage img1 = BufferedImageHelper.createSolidImage(new Color(0, 0, 0));
    BufferedImage img2 = BufferedImageHelper.createSolidImage(new Color(0, 0, 0));
    CheckEqualSizePreprocessor pp = new CheckEqualSizePreprocessor(img1, img2);
    pp.process();
}