@Test
public void testCountPixels_all_pixels_valid() throws Exception {

    final PixelCounter pixelCounter = new PixelCounter();
    final Array array = Array.factory(new byte[][]{
            {0b0000, 0b0000, 0b0000},
            {0b0000, 0b0000, 0b0000},
            {0b0000, 0b0000, 0b0000}
    });
    assertEquals(0, pixelCounter.count(array));
}