public void testEquals() {
        ColumnArrangement c1 = new ColumnArrangement(
            HorizontalAlignment.LEFT, VerticalAlignment.TOP, 1.0, 2.0
        );
        ColumnArrangement c2 = new ColumnArrangement(
            HorizontalAlignment.LEFT, VerticalAlignment.TOP, 1.0, 2.0
        );
        assertTrue(c1.equals(c2));
        assertTrue(c2.equals(c1));

        c1 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.TOP, 1.0, 2.0
        );
        assertFalse(c1.equals(c2));
        c2 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.TOP, 1.0, 2.0
        );
        assertTrue(c1.equals(c2));

        c1 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.BOTTOM, 1.0, 2.0
        );
        assertFalse(c1.equals(c2));
        c2 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.BOTTOM, 1.0, 2.0
        );
        assertTrue(c1.equals(c2));
    
        c1 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.BOTTOM, 1.1, 2.0
        );
        assertFalse(c1.equals(c2));
        c2 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.BOTTOM, 1.1, 2.0
        );
        assertTrue(c1.equals(c2));
        
        c1 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.BOTTOM, 1.1, 2.2
        );
        assertFalse(c1.equals(c2));
        c2 = new ColumnArrangement(
            HorizontalAlignment.RIGHT, VerticalAlignment.BOTTOM, 1.1, 2.2
        );
        assertTrue(c1.equals(c2));