public void TestClearShapes()
{
ShapeFactory sf = new ShapeFactory();
CompositeShape compositeShape = sf.MakeCompositeShape(1, 1);
compositeShape.AddShape(sf.MakeCircle(3, 2, 2));
compositeShape.AddShape(sf.MakePoint(1, 1));
Assert.AreEqual(compositeShape.GetShapes().Count, 2);
compositeShape.ClearShapes();
Assert.AreEqual(compositeShape.GetShapes().Count, 0);
}
