}

    void testCreateTaskForTypeWhichDoesNotImplementTask() {
        when:
        taskFactory.create(new TaskIdentity(NotATask, 'task', null, Path.path(':task'), null, 12))

        then:
        InvalidUserDataException e = thrown()
        e.message == "Cannot create task ':task' of type 'NotATask' as it does not implement the Task interface."
    }

    void testCreateTaskForUnsupportedType() {
        when:

        when:
        container.create([name: 'task', Type: NotATask])

        then:
        exception = thrown()
        exception.message == "Could not create task 'task': Unknown argument(s) in task definition: [Type]"
    }

    static class NotATask {
    }

    void 'can create task with Action'() {
        Action<Task> action = Mock()