p1 = new CategoryLabelPosition(
            RectangleAnchor.TOP, TextBlockAnchor.CENTER, TextAnchor.CENTER, 
            Math.PI / 6.0, CategoryLabelWidthType.CATEGORY, 0.55f
        );
        assertFalse(p1.equals(p2));
        p2 = new CategoryLabelPosition(
            RectangleAnchor.TOP, TextBlockAnchor.CENTER, TextAnchor.CENTER, 
            Math.PI / 6.0, CategoryLabelWidthType.CATEGORY, 0.55f
        );
        assertTrue(p1.equals(p2));