def test_can_chain_select(self):
view = PropertyDictView({"A": 1, "B": 2, "C": 3}).B.C
self.assertEqual(repr(view), "{B: 2, C: 3}")
def test_can_create_double_property_view(self):
view = PropertyDictView({"A": 1, "B": 2})
self.assertEqual(repr(view), "{A: 1, B: 2}")
def test_can_select_non_existing_in_view(self):
view = PropertyDictView({"A": 1, "B": 2}).C
self.assertEqual(repr(view), "{}")
def test_can_create_single_property_view(self):
view = PropertyDictView({"A": 1})
self.assertEqual(repr(view), "{A: 1}")
def test_can_create_empty_view(self):
view = PropertyDictView({})
self.assertEqual(repr(view), "{}")
def test_non_containment(self):
view = PropertyDictView({"A": 1, "B": 2, "C": 3})
self.assertNotIn("D", view)
def test_iterable(self):
view = PropertyDictView({"A": 1, "B": 2, "C": 3})
self.assertEqual(set(view), {"A", "B", "C"})
def test_length(self):
view = PropertyDictView({"A": 1, "B": 2, "C": 3})
self.assertEqual(len(view), 3)