@Test
    public void testRemoveRedMarker() {
        System.out.println("removeRedMarker");
        Cell instance = new Cell(0,0);
        instance.addRedMarker(0);
        instance.addRedMarker(1);
        instance.addRedMarker(2);
        instance.addRedMarker(3);
        instance.addRedMarker(4);
        instance.addRedMarker(5);
        
        boolean[] result = instance.getMarkers(false);
        assertEquals(true, result[0]);
        assertEquals(true, result[1]);
        assertEquals(true, result[2]);
        assertEquals(true, result[3]);
        assertEquals(true, result[4]);
        assertEquals(true, result[5]);
        
        instance.removeRedMarker(0);
        instance.removeRedMarker(1);
        instance.removeRedMarker(2);
        instance.removeRedMarker(3);
        instance.removeRedMarker(4);
        instance.removeRedMarker(5);
        
        result = instance.getMarkers(false);
        assertEquals(false, result[0]);
        assertEquals(false, result[1]);
        assertEquals(false, result[2]);
        assertEquals(false, result[3]);
        assertEquals(false, result[4]);
        assertEquals(false, result[5]);
    }