ShapeFactory.addFactory() is never called in your code.
If it was, it would not work:

ShapeFactory.factories.put[id] = shapeFactory

There is no dict.put method.

Each time you exercise the code you are actually registering the concrete factory within:

ShapeFactory.createShape().

This works, but a check should be made that that the supplied factory is is a subclass of Shape.

--Albert