mirror of
https://github.com/pybind/pybind11.git
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391c75447d
This udpates all the remaining tests to the new test suite code and comment styles started in #898. For the most part, the test coverage here is unchanged, with a few minor exceptions as noted below. - test_constants_and_functions: this adds more overload tests with overloads with different number of arguments for more comprehensive overload_cast testing. The test style conversion broke the overload tests under MSVC 2015, prompting the additional tests while looking for a workaround. - test_eigen: this dropped the unused functions `get_cm_corners` and `get_cm_corners_const`--these same tests were duplicates of the same things provided (and used) via ReturnTester methods. - test_opaque_types: this test had a hidden dependence on ExampleMandA which is now fixed by using the global UserType which suffices for the relevant test. - test_methods_and_attributes: this required some additions to UserType to make it usable as a replacement for the test's previous SimpleType: UserType gained a value mutator, and the `value` property is not mutable (it was previously readonly). Some overload tests were also added to better test overload_cast (as described above). - test_numpy_array: removed the untemplated mutate_data/mutate_data_t: the templated versions with an empty parameter pack expand to the same thing. - test_stl: this was already mostly in the new style; this just tweaks things a bit, localizing a class, and adding some missing `// test_whatever` comments. - test_virtual_functions: like `test_stl`, this was mostly in the new test style already, but needed some `// test_whatever` comments. This commit also moves the inherited virtual example code to the end of the file, after the main set of tests (since it is less important than the other tests, and rather length); it also got renamed to `test_inherited_virtuals` (from `test_inheriting_repeat`) because it tests both inherited virtual approaches, not just the repeat approach.
477 lines
17 KiB
Python
477 lines
17 KiB
Python
import pytest
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from pybind11_tests import methods_and_attributes as m
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from pybind11_tests import ConstructorStats
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def test_methods_and_attributes():
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instance1 = m.ExampleMandA()
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instance2 = m.ExampleMandA(32)
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instance1.add1(instance2)
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instance1.add2(instance2)
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instance1.add3(instance2)
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instance1.add4(instance2)
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instance1.add5(instance2)
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instance1.add6(32)
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instance1.add7(32)
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instance1.add8(32)
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instance1.add9(32)
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instance1.add10(32)
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assert str(instance1) == "ExampleMandA[value=320]"
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assert str(instance2) == "ExampleMandA[value=32]"
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assert str(instance1.self1()) == "ExampleMandA[value=320]"
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assert str(instance1.self2()) == "ExampleMandA[value=320]"
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assert str(instance1.self3()) == "ExampleMandA[value=320]"
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assert str(instance1.self4()) == "ExampleMandA[value=320]"
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assert str(instance1.self5()) == "ExampleMandA[value=320]"
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assert instance1.internal1() == 320
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assert instance1.internal2() == 320
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assert instance1.internal3() == 320
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assert instance1.internal4() == 320
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assert instance1.internal5() == 320
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assert instance1.overloaded() == "()"
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assert instance1.overloaded(0) == "(int)"
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assert instance1.overloaded(1, 1.0) == "(int, float)"
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assert instance1.overloaded(2.0, 2) == "(float, int)"
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assert instance1.overloaded(3, 3) == "(int, int)"
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assert instance1.overloaded(4., 4.) == "(float, float)"
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assert instance1.overloaded_const(-3) == "(int) const"
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assert instance1.overloaded_const(5, 5.0) == "(int, float) const"
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assert instance1.overloaded_const(6.0, 6) == "(float, int) const"
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assert instance1.overloaded_const(7, 7) == "(int, int) const"
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assert instance1.overloaded_const(8., 8.) == "(float, float) const"
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assert instance1.overloaded_float(1, 1) == "(float, float)"
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assert instance1.overloaded_float(1, 1.) == "(float, float)"
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assert instance1.overloaded_float(1., 1) == "(float, float)"
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assert instance1.overloaded_float(1., 1.) == "(float, float)"
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assert instance1.value == 320
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instance1.value = 100
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assert str(instance1) == "ExampleMandA[value=100]"
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cstats = ConstructorStats.get(m.ExampleMandA)
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assert cstats.alive() == 2
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del instance1, instance2
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assert cstats.alive() == 0
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assert cstats.values() == ["32"]
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assert cstats.default_constructions == 1
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assert cstats.copy_constructions == 3
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assert cstats.move_constructions >= 1
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assert cstats.copy_assignments == 0
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assert cstats.move_assignments == 0
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def test_copy_method():
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"""Issue #443: calling copied methods fails in Python 3"""
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m.ExampleMandA.add2c = m.ExampleMandA.add2
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m.ExampleMandA.add2d = m.ExampleMandA.add2b
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a = m.ExampleMandA(123)
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assert a.value == 123
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a.add2(m.ExampleMandA(-100))
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assert a.value == 23
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a.add2b(m.ExampleMandA(20))
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assert a.value == 43
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a.add2c(m.ExampleMandA(6))
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assert a.value == 49
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a.add2d(m.ExampleMandA(-7))
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assert a.value == 42
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def test_properties():
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instance = m.TestProperties()
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assert instance.def_readonly == 1
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with pytest.raises(AttributeError):
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instance.def_readonly = 2
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instance.def_readwrite = 2
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assert instance.def_readwrite == 2
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assert instance.def_property_readonly == 2
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with pytest.raises(AttributeError):
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instance.def_property_readonly = 3
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instance.def_property = 3
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assert instance.def_property == 3
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def test_static_properties():
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assert m.TestProperties.def_readonly_static == 1
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with pytest.raises(AttributeError) as excinfo:
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m.TestProperties.def_readonly_static = 2
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assert "can't set attribute" in str(excinfo)
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m.TestProperties.def_readwrite_static = 2
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assert m.TestProperties.def_readwrite_static == 2
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assert m.TestProperties.def_property_readonly_static == 2
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with pytest.raises(AttributeError) as excinfo:
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m.TestProperties.def_property_readonly_static = 3
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assert "can't set attribute" in str(excinfo)
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m.TestProperties.def_property_static = 3
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assert m.TestProperties.def_property_static == 3
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# Static property read and write via instance
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instance = m.TestProperties()
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m.TestProperties.def_readwrite_static = 0
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assert m.TestProperties.def_readwrite_static == 0
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assert instance.def_readwrite_static == 0
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instance.def_readwrite_static = 2
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assert m.TestProperties.def_readwrite_static == 2
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assert instance.def_readwrite_static == 2
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# It should be possible to override properties in derived classes
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assert m.TestPropertiesOverride().def_readonly == 99
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assert m.TestPropertiesOverride.def_readonly_static == 99
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def test_static_cls():
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"""Static property getter and setters expect the type object as the their only argument"""
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instance = m.TestProperties()
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assert m.TestProperties.static_cls is m.TestProperties
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assert instance.static_cls is m.TestProperties
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def check_self(self):
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assert self is m.TestProperties
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m.TestProperties.static_cls = check_self
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instance.static_cls = check_self
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def test_metaclass_override():
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"""Overriding pybind11's default metaclass changes the behavior of `static_property`"""
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assert type(m.ExampleMandA).__name__ == "pybind11_type"
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assert type(m.MetaclassOverride).__name__ == "type"
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assert m.MetaclassOverride.readonly == 1
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assert type(m.MetaclassOverride.__dict__["readonly"]).__name__ == "pybind11_static_property"
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# Regular `type` replaces the property instead of calling `__set__()`
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m.MetaclassOverride.readonly = 2
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assert m.MetaclassOverride.readonly == 2
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assert isinstance(m.MetaclassOverride.__dict__["readonly"], int)
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def test_no_mixed_overloads():
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from pybind11_tests import debug_enabled
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with pytest.raises(RuntimeError) as excinfo:
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m.ExampleMandA.add_mixed_overloads1()
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assert (str(excinfo.value) ==
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"overloading a method with both static and instance methods is not supported; " +
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("compile in debug mode for more details" if not debug_enabled else
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"error while attempting to bind static method ExampleMandA.overload_mixed1"
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"(arg0: float) -> str")
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)
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with pytest.raises(RuntimeError) as excinfo:
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m.ExampleMandA.add_mixed_overloads2()
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assert (str(excinfo.value) ==
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"overloading a method with both static and instance methods is not supported; " +
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("compile in debug mode for more details" if not debug_enabled else
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"error while attempting to bind instance method ExampleMandA.overload_mixed2"
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"(self: pybind11_tests.methods_and_attributes.ExampleMandA, arg0: int, arg1: int)"
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" -> str")
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)
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@pytest.mark.parametrize("access", ["ro", "rw", "static_ro", "static_rw"])
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def test_property_return_value_policies(access):
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if not access.startswith("static"):
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obj = m.TestPropRVP()
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else:
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obj = m.TestPropRVP
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ref = getattr(obj, access + "_ref")
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assert ref.value == 1
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ref.value = 2
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assert getattr(obj, access + "_ref").value == 2
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ref.value = 1 # restore original value for static properties
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copy = getattr(obj, access + "_copy")
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assert copy.value == 1
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copy.value = 2
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assert getattr(obj, access + "_copy").value == 1
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copy = getattr(obj, access + "_func")
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assert copy.value == 1
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copy.value = 2
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assert getattr(obj, access + "_func").value == 1
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def test_property_rvalue_policy():
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"""When returning an rvalue, the return value policy is automatically changed from
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`reference(_internal)` to `move`. The following would not work otherwise."""
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instance = m.TestPropRVP()
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o = instance.rvalue
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assert o.value == 1
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os = m.TestPropRVP.static_rvalue
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assert os.value == 1
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# https://bitbucket.org/pypy/pypy/issues/2447
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@pytest.unsupported_on_pypy
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def test_dynamic_attributes():
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instance = m.DynamicClass()
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assert not hasattr(instance, "foo")
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assert "foo" not in dir(instance)
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# Dynamically add attribute
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instance.foo = 42
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assert hasattr(instance, "foo")
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assert instance.foo == 42
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assert "foo" in dir(instance)
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# __dict__ should be accessible and replaceable
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assert "foo" in instance.__dict__
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instance.__dict__ = {"bar": True}
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assert not hasattr(instance, "foo")
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assert hasattr(instance, "bar")
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with pytest.raises(TypeError) as excinfo:
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instance.__dict__ = []
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assert str(excinfo.value) == "__dict__ must be set to a dictionary, not a 'list'"
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cstats = ConstructorStats.get(m.DynamicClass)
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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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# Derived classes should work as well
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class PythonDerivedDynamicClass(m.DynamicClass):
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pass
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for cls in m.CppDerivedDynamicClass, PythonDerivedDynamicClass:
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derived = cls()
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derived.foobar = 100
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assert derived.foobar == 100
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assert cstats.alive() == 1
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del derived
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assert cstats.alive() == 0
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# https://bitbucket.org/pypy/pypy/issues/2447
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@pytest.unsupported_on_pypy
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def test_cyclic_gc():
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# One object references itself
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instance = m.DynamicClass()
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instance.circular_reference = instance
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cstats = ConstructorStats.get(m.DynamicClass)
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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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# Two object reference each other
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i1 = m.DynamicClass()
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i2 = m.DynamicClass()
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i1.cycle = i2
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i2.cycle = i1
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assert cstats.alive() == 2
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del i1, i2
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assert cstats.alive() == 0
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def test_noconvert_args(msg):
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a = m.ArgInspector()
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assert msg(a.f("hi")) == """
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loading ArgInspector1 argument WITH conversion allowed. Argument value = hi
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"""
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assert msg(a.g("this is a", "this is b")) == """
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a
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loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b
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13
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loading ArgInspector2 argument WITH conversion allowed. Argument value = (default arg inspector 2)
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""" # noqa: E501 line too long
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assert msg(a.g("this is a", "this is b", 42)) == """
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a
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loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b
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42
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loading ArgInspector2 argument WITH conversion allowed. Argument value = (default arg inspector 2)
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""" # noqa: E501 line too long
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assert msg(a.g("this is a", "this is b", 42, "this is d")) == """
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = this is a
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loading ArgInspector1 argument WITH conversion allowed. Argument value = this is b
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42
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loading ArgInspector2 argument WITH conversion allowed. Argument value = this is d
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"""
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assert (a.h("arg 1") ==
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"loading ArgInspector2 argument WITHOUT conversion allowed. Argument value = arg 1")
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assert msg(m.arg_inspect_func("A1", "A2")) == """
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loading ArgInspector2 argument WITH conversion allowed. Argument value = A1
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loading ArgInspector1 argument WITHOUT conversion allowed. Argument value = A2
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"""
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assert m.floats_preferred(4) == 2.0
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assert m.floats_only(4.0) == 2.0
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with pytest.raises(TypeError) as excinfo:
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m.floats_only(4)
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assert msg(excinfo.value) == """
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floats_only(): incompatible function arguments. The following argument types are supported:
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1. (f: float) -> float
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Invoked with: 4
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"""
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assert m.ints_preferred(4) == 2
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assert m.ints_preferred(True) == 0
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with pytest.raises(TypeError) as excinfo:
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m.ints_preferred(4.0)
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assert msg(excinfo.value) == """
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ints_preferred(): incompatible function arguments. The following argument types are supported:
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1. (i: int) -> int
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Invoked with: 4.0
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""" # noqa: E501 line too long
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assert m.ints_only(4) == 2
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with pytest.raises(TypeError) as excinfo:
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m.ints_only(4.0)
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assert msg(excinfo.value) == """
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ints_only(): incompatible function arguments. The following argument types are supported:
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1. (i: int) -> int
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Invoked with: 4.0
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"""
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def test_bad_arg_default(msg):
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from pybind11_tests import debug_enabled
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with pytest.raises(RuntimeError) as excinfo:
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m.bad_arg_def_named()
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assert msg(excinfo.value) == (
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"arg(): could not convert default argument 'a: UnregisteredType' in function "
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"'should_fail' into a Python object (type not registered yet?)"
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if debug_enabled else
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"arg(): could not convert default argument into a Python object (type not registered "
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"yet?). Compile in debug mode for more information."
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)
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with pytest.raises(RuntimeError) as excinfo:
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m.bad_arg_def_unnamed()
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assert msg(excinfo.value) == (
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"arg(): could not convert default argument 'UnregisteredType' in function "
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"'should_fail' into a Python object (type not registered yet?)"
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if debug_enabled else
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"arg(): could not convert default argument into a Python object (type not registered "
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"yet?). Compile in debug mode for more information."
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)
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def test_accepts_none(msg):
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a = m.NoneTester()
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assert m.no_none1(a) == 42
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assert m.no_none2(a) == 42
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assert m.no_none3(a) == 42
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assert m.no_none4(a) == 42
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assert m.no_none5(a) == 42
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assert m.ok_none1(a) == 42
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assert m.ok_none2(a) == 42
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assert m.ok_none3(a) == 42
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assert m.ok_none4(a) == 42
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assert m.ok_none5(a) == 42
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with pytest.raises(TypeError) as excinfo:
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m.no_none1(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none2(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none3(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none4(None)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.no_none5(None)
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assert "incompatible function arguments" in str(excinfo.value)
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# The first one still raises because you can't pass None as a lvalue reference arg:
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with pytest.raises(TypeError) as excinfo:
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assert m.ok_none1(None) == -1
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assert msg(excinfo.value) == """
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ok_none1(): incompatible function arguments. The following argument types are supported:
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1. (arg0: m.methods_and_attributes.NoneTester) -> int
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Invoked with: None
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"""
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# The rest take the argument as pointer or holder, and accept None:
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assert m.ok_none2(None) == -1
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assert m.ok_none3(None) == -1
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assert m.ok_none4(None) == -1
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assert m.ok_none5(None) == -1
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def test_str_issue(msg):
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"""#283: __str__ called on uninitialized instance when constructor arguments invalid"""
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assert str(m.StrIssue(3)) == "StrIssue[3]"
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with pytest.raises(TypeError) as excinfo:
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str(m.StrIssue("no", "such", "constructor"))
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assert msg(excinfo.value) == """
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__init__(): incompatible constructor arguments. The following argument types are supported:
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1. m.methods_and_attributes.StrIssue(arg0: int)
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2. m.methods_and_attributes.StrIssue()
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Invoked with: 'no', 'such', 'constructor'
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"""
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def test_unregistered_base_implementations():
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a = m.RegisteredDerived()
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a.do_nothing()
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assert a.rw_value == 42
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assert a.ro_value == 1.25
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a.rw_value += 5
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assert a.sum() == 48.25
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a.increase_value()
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assert a.rw_value == 48
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assert a.ro_value == 1.5
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assert a.sum() == 49.5
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assert a.rw_value_prop == 48
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a.rw_value_prop += 1
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assert a.rw_value_prop == 49
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a.increase_value()
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assert a.ro_value_prop == 1.75
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def test_custom_caster_destruction():
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"""Tests that returning a pointer to a type that gets converted with a custom type caster gets
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destroyed when the function has py::return_value_policy::take_ownership policy applied."""
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cstats = m.destruction_tester_cstats()
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# This one *doesn't* have take_ownership: the pointer should be used but not destroyed:
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z = m.custom_caster_no_destroy()
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assert cstats.alive() == 1 and cstats.default_constructions == 1
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assert z
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# take_ownership applied: this constructs a new object, casts it, then destroys it:
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z = m.custom_caster_destroy()
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assert z
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assert cstats.default_constructions == 2
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# Same, but with a const pointer return (which should *not* inhibit destruction):
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z = m.custom_caster_destroy_const()
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assert z
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assert cstats.default_constructions == 3
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# Make sure we still only have the original object (from ..._no_destroy()) alive:
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assert cstats.alive() == 1
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