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import pytest
def test_inheritance(msg):
from pybind11_tests import Pet, Dog, Rabbit, Hamster, Chimera, 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: <m.Pet object at 0>
"""
with pytest.raises(TypeError) as excinfo:
Chimera("lion", "goat")
assert "No constructor defined!" in str(excinfo.value)
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
def test_holder():
from pybind11_tests import test_mismatched_holder_type_1, test_mismatched_holder_type_2
with pytest.raises(RuntimeError) as excinfo:
test_mismatched_holder_type_1()
assert str(excinfo.value) == ("generic_type: type \"MismatchDerived1\" does not have "
"a non-default holder type while its base "
"\"MismatchBase1\" does")
with pytest.raises(RuntimeError) as excinfo:
test_mismatched_holder_type_2()
assert str(excinfo.value) == ("generic_type: type \"MismatchDerived2\" has a "
"non-default holder type while its base "
"\"MismatchBase2\" does not")
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