function assertImagesAreCorrect(results) {
  assertEquals(googObject.getCount(TEST_IMAGES), googObject.getCount(results));
  googObject.forEach(TEST_IMAGES, (value, key) => {
    // Check if fires the COMPLETE event.
    assertTrue('Image is not loaded completely.', key in results);

    const image = results[key];

    // Check image size.
    assertEquals('Image width is not correct', value[0], image[0]);
    assertEquals('Image length is not correct', value[1], image[1]);

    // Check if fired the correct event.
    assertEquals('Event *' + value[2] + '* must be fired', value[2], image[2]);
  });
}
Mapping from test image file name to:
[expected width, expected height, expected event to be fired].