@Override
    public String toString() {
        StringBuilder stringBuilder = new StringBuilder();
        stringBuilder.append("width=");
        stringBuilder.append(this.width);
        stringBuilder.append(", height=");
        stringBuilder.append(this.height);
        return stringBuilder.toString();
    }
@Test
    public void toStringTest() {
        Dimension dimension = new Dimension(1, 2);
        Assert.assertEquals(POINT_TO_STRING, dimension.toString());
    }