def test_factory_returned_none(self):
class Configurer:
def a(self) -> str:
return None
ctx = Pytel(Configurer())
self.assertRaises(ValueError, lambda: ctx._get('a'))
def test_object_not_truthy_is_valid(self):
def factory() -> int:
return 0
self.assertFalse(factory())
ctx = Pytel({'a': factory})
self.assertEqual(0, ctx._get('a'))
def test_factory_returning_subclass(self):
class D(A):
pass
def factory() -> A:
return D()
ctx = Pytel({'a': factory})
self.assertIsInstance(ctx._get('a'), D)
def test_object_not_truthy_is_valid_dependency(self):
def factory() -> int:
return 0
def factory2(a: int) -> B:
self.assertEqual(0, a)
return B()
ctx = Pytel({'a': factory, 'b': factory2})
self.assertIsInstance(ctx._get('b'), B)
def test_factory_returning_subclass_as_dependency(self):
class D(A):
pass
def factory() -> A:
return D()
ctx = Pytel({'a': factory, 'c': C})
c = ctx._get('c')
self.assertIsInstance(c, C)
self.assertIsInstance(c.a, D)
def test_get_missing_name(self):
ctx = Pytel([])
self.assertRaises(KeyError, lambda: ctx._get('a'))