import pytest def test_inheritance(msg): from pybind11_tests import Pet, Dog, Rabbit, Hamster, dog_bark, pet_name_species roger = Rabbit('Rabbit') assert roger.name() + " is a " + roger.species() == "Rabbit is a parrot" assert pet_name_species(roger) == "Rabbit is a parrot" polly = Pet('Polly', 'parrot') assert polly.name() + " is a " + polly.species() == "Polly is a parrot" assert pet_name_species(polly) == "Polly is a parrot" molly = Dog('Molly') assert molly.name() + " is a " + molly.species() == "Molly is a dog" assert pet_name_species(molly) == "Molly is a dog" fred = Hamster('Fred') assert fred.name() + " is a " + fred.species() == "Fred is a rodent" assert dog_bark(molly) == "Woof!" with pytest.raises(TypeError) as excinfo: dog_bark(polly) assert msg(excinfo.value) == """ dog_bark(): incompatible function arguments. The following argument types are supported: 1. (arg0: m.Dog) -> str Invoked with: """ def test_automatic_upcasting(): from pybind11_tests import return_class_1, return_class_2, return_class_n, return_none assert type(return_class_1()).__name__ == "DerivedClass1" assert type(return_class_2()).__name__ == "DerivedClass2" assert type(return_none()).__name__ == "NoneType" # Repeat these a few times in a random order to ensure no invalid caching is applied assert type(return_class_n(1)).__name__ == "DerivedClass1" assert type(return_class_n(2)).__name__ == "DerivedClass2" assert type(return_class_n(0)).__name__ == "BaseClass" assert type(return_class_n(2)).__name__ == "DerivedClass2" assert type(return_class_n(2)).__name__ == "DerivedClass2" assert type(return_class_n(0)).__name__ == "BaseClass" assert type(return_class_n(1)).__name__ == "DerivedClass1" def test_isinstance(): from pybind11_tests import test_isinstance, Pet, Dog objects = [tuple(), dict(), Pet("Polly", "parrot")] + [Dog("Molly")] * 4 expected = (True, True, True, True, True, False, False) assert test_isinstance(objects) == expected