import unittest

from django_components import component

from .django_test_setup import *  # NOQA


class MockComponent(object):
    pass


class ComponentRegistryTest(unittest.TestCase):
    def setUp(self):
        self.registry = component.ComponentRegistry()

    def test_register_class_decorator(self):
        @component.register("decorated_component")
        class TestComponent(component.Component):
            pass

        self.assertEqual(
            component.registry.get("decorated_component"), TestComponent
        )

    def test_simple_register(self):
        self.registry.register(name="testcomponent", component=MockComponent)
        self.assertEqual(self.registry.all(), {"testcomponent": MockComponent})

    def test_register_two_components(self):
        self.registry.register(name="testcomponent", component=MockComponent)
        self.registry.register(name="testcomponent2", component=MockComponent)
        self.assertEqual(
            self.registry.all(),
            {
                "testcomponent": MockComponent,
                "testcomponent2": MockComponent,
            },
        )

    def test_prevent_registering_twice(self):
        self.registry.register(name="testcomponent", component=MockComponent)
        with self.assertRaises(component.AlreadyRegistered):
            self.registry.register(
                name="testcomponent", component=MockComponent
            )

    def test_simple_unregister(self):
        self.registry.register(name="testcomponent", component=MockComponent)
        self.registry.unregister(name="testcomponent")
        self.assertEqual(self.registry.all(), {})

    def test_raises_on_failed_unregister(self):
        with self.assertRaises(component.NotRegistered):
            self.registry.unregister(name="testcomponent")