def test_instantiating_invalid_forward(self):
X = Alternative("X", A={'x': lambda: this_does_not_Exist})
with self.assertRaises(TypeError):
X.A()
this_does_not_exist = int
#fixing it doesn't help
with self.assertRaises(TypeError):
X.A()
#but a new type is OK.
X = Alternative("X", A={'x': lambda: this_does_not_exist})
X.A()
def test_extracted_alternatives_have_correct_type(self):
Alt = Alternative(
"Alt",
A={},
B={}
)
tOfAlt = TupleOf(Alt)
a = Alt.A()
aTup = tOfAlt((a,))
self.assertEqual(a, aTup[0])
self.assertTrue(type(a) is type(aTup[0]))
def test_empty_alternatives(self):
a = Alternative(
"Alt",
A={},
B={}
)
self.assertEqual(a.A(), a.A())
self.assertIsInstance(deserialize(a, serialize(a, a.A())), a.A)
self.assertEqual(a.A(), deserialize(a, serialize(a, a.A())))
self.assertEqual(a.B(), a.B())
self.assertNotEqual(a.A(), a.B())
self.assertNotEqual(a.B(), a.A())