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130 lines
4.4 KiB
Python
130 lines
4.4 KiB
Python
import pytest
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from pybind11_tests import class_ as m
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from pybind11_tests import UserType, ConstructorStats
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def test_repr():
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# In Python 3.3+, repr() accesses __qualname__
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assert "pybind11_type" in repr(type(UserType))
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assert "UserType" in repr(UserType)
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def test_instance(msg):
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with pytest.raises(TypeError) as excinfo:
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m.NoConstructor()
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assert msg(excinfo.value) == "m.class_.NoConstructor: No constructor defined!"
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instance = m.NoConstructor.new_instance()
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cstats = ConstructorStats.get(m.NoConstructor)
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assert cstats.alive() == 1
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del instance
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assert cstats.alive() == 0
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def test_docstrings(doc):
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assert doc(UserType) == "A `py::class_` type for testing"
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assert UserType.__name__ == "UserType"
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assert UserType.__module__ == "pybind11_tests"
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assert UserType.get_value.__name__ == "get_value"
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assert UserType.get_value.__module__ == "pybind11_tests"
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assert doc(UserType.get_value) == """
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get_value(self: m.UserType) -> int
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Get value using a method
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"""
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assert doc(UserType.value) == "Get value using a property"
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assert doc(m.NoConstructor.new_instance) == """
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new_instance() -> m.class_.NoConstructor
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Return an instance
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"""
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def test_inheritance(msg):
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roger = m.Rabbit('Rabbit')
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assert roger.name() + " is a " + roger.species() == "Rabbit is a parrot"
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assert m.pet_name_species(roger) == "Rabbit is a parrot"
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polly = m.Pet('Polly', 'parrot')
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assert polly.name() + " is a " + polly.species() == "Polly is a parrot"
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assert m.pet_name_species(polly) == "Polly is a parrot"
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molly = m.Dog('Molly')
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assert molly.name() + " is a " + molly.species() == "Molly is a dog"
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assert m.pet_name_species(molly) == "Molly is a dog"
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fred = m.Hamster('Fred')
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assert fred.name() + " is a " + fred.species() == "Fred is a rodent"
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assert m.dog_bark(molly) == "Woof!"
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with pytest.raises(TypeError) as excinfo:
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m.dog_bark(polly)
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assert msg(excinfo.value) == """
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dog_bark(): incompatible function arguments. The following argument types are supported:
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1. (arg0: m.class_.Dog) -> str
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Invoked with: <m.class_.Pet object at 0>
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"""
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with pytest.raises(TypeError) as excinfo:
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m.Chimera("lion", "goat")
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assert "No constructor defined!" in str(excinfo.value)
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def test_automatic_upcasting():
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assert type(m.return_class_1()).__name__ == "DerivedClass1"
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assert type(m.return_class_2()).__name__ == "DerivedClass2"
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assert type(m.return_none()).__name__ == "NoneType"
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# Repeat these a few times in a random order to ensure no invalid caching is applied
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assert type(m.return_class_n(1)).__name__ == "DerivedClass1"
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assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
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assert type(m.return_class_n(0)).__name__ == "BaseClass"
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assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
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assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
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assert type(m.return_class_n(0)).__name__ == "BaseClass"
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assert type(m.return_class_n(1)).__name__ == "DerivedClass1"
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def test_isinstance():
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objects = [tuple(), dict(), m.Pet("Polly", "parrot")] + [m.Dog("Molly")] * 4
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expected = (True, True, True, True, True, False, False)
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assert m.check_instances(objects) == expected
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def test_mismatched_holder():
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import re
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with pytest.raises(RuntimeError) as excinfo:
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m.mismatched_holder_1()
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assert re.match('generic_type: type ".*MismatchDerived1" does not have a non-default '
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'holder type while its base ".*MismatchBase1" does', str(excinfo.value))
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with pytest.raises(RuntimeError) as excinfo:
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m.mismatched_holder_2()
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assert re.match('generic_type: type ".*MismatchDerived2" has a non-default holder type '
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'while its base ".*MismatchBase2" does not', str(excinfo.value))
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def test_override_static():
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"""#511: problem with inheritance + overwritten def_static"""
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b = m.MyBase.make()
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d1 = m.MyDerived.make2()
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d2 = m.MyDerived.make()
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assert isinstance(b, m.MyBase)
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assert isinstance(d1, m.MyDerived)
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assert isinstance(d2, m.MyDerived)
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def test_implicit_conversion_life_support():
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"""Ensure the lifetime of temporary objects created for implicit conversions"""
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assert m.implicitly_convert_argument(UserType(5)) == 5
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assert m.implicitly_convert_variable(UserType(5)) == 5
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assert "outside a bound function" in m.implicitly_convert_variable_fail(UserType(5))
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