b1 = new EmptyBlock(1.1, 2.0);
        assertFalse(b1.equals(b2));
        b2 = new EmptyBlock(1.1, 2.0);
        assertTrue(b1.equals(b2));

        b1 = new EmptyBlock(1.1, 2.2);
        assertFalse(b1.equals(b2));
        b2 = new EmptyBlock(1.1, 2.2);
        assertTrue(b1.equals(b2));