public void RectangleWithXY()
{
var rectangle = new Rectangle(
20, 20,
30, 20,
30, 30,
20, 30);
Assert.IsTrue(rectangle.GetType() == typeof(Rectangle));
Assert.IsTrue(rectangle.Height == 10 && rectangle.Width == 10);
Assert.IsTrue(rectangle.Lines.Count == 4);
Assert.AreEqual(15, rectangle.CenterPoint.X);
Assert.AreEqual(15, rectangle.CenterPoint.Y); Assert.AreEqual(rectangle.Fill, Color.Empty);
Assert.AreEqual(rectangle.Stroke, Color.Black);
Assert.AreEqual(100, rectangle.ComputeArea());
Assert.AreEqual(10, rectangle.CalculateHeight());
Assert.AreEqual(10, rectangle.CalculateWidth());
Assert.IsFalse(rectangle.CompositeShape);
rectangle.Fill = Color.Aqua;
Assert.AreEqual(Color.Aqua, rectangle.Fill);
foreach (var line in rectangle.Lines)
{
Assert.IsTrue(line.ComputeLength() == 10);
}
}