public void TestStandardMerge()
{
Shape shape1 = Shapes.newValidShape();
Shape shape2 = Shapes.newValidShape();
Shape shape3 = Shapes.newValidShape();
Sketch.Sketch sketch = new Sketch.Sketch();
sketch.CheckConsistency();
sketch.AddShape(shape1);
sketch.AddShape(shape2);
sketch.AddShape(shape3);
sketch.connectShapes(shape1, shape3);
sketch.connectShapes(shape2, shape3);
Assert.IsTrue(sketch.AreConnected(shape1, shape3), "Shape 1 is not connected to shape 3");
Assert.IsTrue(sketch.AreConnected(shape2, shape3), "Shape 2 is not connected to shape 3");
sketch.CheckConsistency();
Assert.IsTrue(sketch.containsShape(shape1), "Sketch does not contain shape 1");
Assert.IsTrue(sketch.containsShape(shape2), "Sketch does not contain shape 2");
sketch.mergeShapes(shape1, shape2);
Assert.IsTrue(sketch.AreConnected(shape1, shape3), "Shape 1 is not connected to shape 3 (after merge)");
Assert.IsFalse(sketch.AreConnected(shape1, shape1), "Shape 1 is connected to itself (after merge)");
Assert.IsFalse(sketch.AreConnected(shape1, shape2), "Shape 1 is connected to shape 2 (after merge)");
Assert.IsTrue(sketch.containsShape(shape1), "Sketch does not contain shape 1 (after merge)");
Assert.IsFalse(sketch.containsShape(shape2), "Sketch contains shape 2 (after merge)");
}