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.
364 lines
11 KiB
Python
364 lines
11 KiB
Python
import pytest
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from pybind11_tests import virtual_functions as m
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from pybind11_tests import ConstructorStats
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def test_override(capture, msg):
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class ExtendedExampleVirt(m.ExampleVirt):
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def __init__(self, state):
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super(ExtendedExampleVirt, self).__init__(state + 1)
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self.data = "Hello world"
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def run(self, value):
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print('ExtendedExampleVirt::run(%i), calling parent..' % value)
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return super(ExtendedExampleVirt, self).run(value + 1)
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def run_bool(self):
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print('ExtendedExampleVirt::run_bool()')
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return False
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def get_string1(self):
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return "override1"
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def pure_virtual(self):
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print('ExtendedExampleVirt::pure_virtual(): %s' % self.data)
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class ExtendedExampleVirt2(ExtendedExampleVirt):
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def __init__(self, state):
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super(ExtendedExampleVirt2, self).__init__(state + 1)
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def get_string2(self):
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return "override2"
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ex12 = m.ExampleVirt(10)
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with capture:
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assert m.runExampleVirt(ex12, 20) == 30
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assert capture == """
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Original implementation of ExampleVirt::run(state=10, value=20, str1=default1, str2=default2)
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""" # noqa: E501 line too long
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with pytest.raises(RuntimeError) as excinfo:
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m.runExampleVirtVirtual(ex12)
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assert msg(excinfo.value) == 'Tried to call pure virtual function "ExampleVirt::pure_virtual"'
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ex12p = ExtendedExampleVirt(10)
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with capture:
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assert m.runExampleVirt(ex12p, 20) == 32
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assert capture == """
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ExtendedExampleVirt::run(20), calling parent..
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Original implementation of ExampleVirt::run(state=11, value=21, str1=override1, str2=default2)
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""" # noqa: E501 line too long
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with capture:
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assert m.runExampleVirtBool(ex12p) is False
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assert capture == "ExtendedExampleVirt::run_bool()"
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with capture:
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m.runExampleVirtVirtual(ex12p)
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assert capture == "ExtendedExampleVirt::pure_virtual(): Hello world"
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ex12p2 = ExtendedExampleVirt2(15)
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with capture:
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assert m.runExampleVirt(ex12p2, 50) == 68
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assert capture == """
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ExtendedExampleVirt::run(50), calling parent..
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Original implementation of ExampleVirt::run(state=17, value=51, str1=override1, str2=override2)
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""" # noqa: E501 line too long
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cstats = ConstructorStats.get(m.ExampleVirt)
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assert cstats.alive() == 3
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del ex12, ex12p, ex12p2
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assert cstats.alive() == 0
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assert cstats.values() == ['10', '11', '17']
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assert cstats.copy_constructions == 0
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assert cstats.move_constructions >= 0
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def test_alias_delay_initialization1(capture):
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"""`A` only initializes its trampoline class when we inherit from it
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If we just create and use an A instance directly, the trampoline initialization is
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bypassed and we only initialize an A() instead (for performance reasons).
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"""
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class B(m.A):
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def __init__(self):
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super(B, self).__init__()
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def f(self):
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print("In python f()")
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# C++ version
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with capture:
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a = m.A()
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m.call_f(a)
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del a
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pytest.gc_collect()
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assert capture == "A.f()"
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# Python version
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with capture:
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b = B()
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m.call_f(b)
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del b
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pytest.gc_collect()
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assert capture == """
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PyA.PyA()
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PyA.f()
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In python f()
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PyA.~PyA()
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"""
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def test_alias_delay_initialization2(capture):
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"""`A2`, unlike the above, is configured to always initialize the alias
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While the extra initialization and extra class layer has small virtual dispatch
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performance penalty, it also allows us to do more things with the trampoline
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class such as defining local variables and performing construction/destruction.
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"""
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class B2(m.A2):
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def __init__(self):
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super(B2, self).__init__()
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def f(self):
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print("In python B2.f()")
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# No python subclass version
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with capture:
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a2 = m.A2()
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m.call_f(a2)
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del a2
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pytest.gc_collect()
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assert capture == """
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PyA2.PyA2()
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PyA2.f()
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A2.f()
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PyA2.~PyA2()
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"""
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# Python subclass version
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with capture:
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b2 = B2()
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m.call_f(b2)
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del b2
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pytest.gc_collect()
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assert capture == """
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PyA2.PyA2()
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PyA2.f()
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In python B2.f()
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PyA2.~PyA2()
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"""
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# PyPy: Reference count > 1 causes call with noncopyable instance
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# to fail in ncv1.print_nc()
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@pytest.unsupported_on_pypy
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@pytest.mark.skipif(not hasattr(m, "NCVirt"), reason="NCVirt test broken on ICPC")
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def test_move_support():
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class NCVirtExt(m.NCVirt):
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def get_noncopyable(self, a, b):
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# Constructs and returns a new instance:
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nc = m.NonCopyable(a * a, b * b)
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return nc
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def get_movable(self, a, b):
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# Return a referenced copy
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self.movable = m.Movable(a, b)
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return self.movable
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class NCVirtExt2(m.NCVirt):
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def get_noncopyable(self, a, b):
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# Keep a reference: this is going to throw an exception
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self.nc = m.NonCopyable(a, b)
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return self.nc
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def get_movable(self, a, b):
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# Return a new instance without storing it
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return m.Movable(a, b)
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ncv1 = NCVirtExt()
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assert ncv1.print_nc(2, 3) == "36"
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assert ncv1.print_movable(4, 5) == "9"
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ncv2 = NCVirtExt2()
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assert ncv2.print_movable(7, 7) == "14"
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# Don't check the exception message here because it differs under debug/non-debug mode
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with pytest.raises(RuntimeError):
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ncv2.print_nc(9, 9)
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nc_stats = ConstructorStats.get(m.NonCopyable)
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mv_stats = ConstructorStats.get(m.Movable)
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assert nc_stats.alive() == 1
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assert mv_stats.alive() == 1
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del ncv1, ncv2
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assert nc_stats.alive() == 0
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assert mv_stats.alive() == 0
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assert nc_stats.values() == ['4', '9', '9', '9']
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assert mv_stats.values() == ['4', '5', '7', '7']
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assert nc_stats.copy_constructions == 0
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assert mv_stats.copy_constructions == 1
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assert nc_stats.move_constructions >= 0
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assert mv_stats.move_constructions >= 0
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def test_dispatch_issue(msg):
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"""#159: virtual function dispatch has problems with similar-named functions"""
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class PyClass1(m.DispatchIssue):
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def dispatch(self):
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return "Yay.."
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class PyClass2(m.DispatchIssue):
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def dispatch(self):
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with pytest.raises(RuntimeError) as excinfo:
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super(PyClass2, self).dispatch()
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assert msg(excinfo.value) == 'Tried to call pure virtual function "Base::dispatch"'
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p = PyClass1()
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return m.dispatch_issue_go(p)
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b = PyClass2()
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assert m.dispatch_issue_go(b) == "Yay.."
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def test_override_ref():
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"""#392/397: overridding reference-returning functions"""
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o = m.OverrideTest("asdf")
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# Not allowed (see associated .cpp comment)
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# i = o.str_ref()
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# assert o.str_ref() == "asdf"
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assert o.str_value() == "asdf"
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assert o.A_value().value == "hi"
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a = o.A_ref()
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assert a.value == "hi"
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a.value = "bye"
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assert a.value == "bye"
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def test_inherited_virtuals():
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class AR(m.A_Repeat):
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def unlucky_number(self):
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return 99
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class AT(m.A_Tpl):
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def unlucky_number(self):
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return 999
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obj = AR()
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assert obj.say_something(3) == "hihihi"
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assert obj.unlucky_number() == 99
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assert obj.say_everything() == "hi 99"
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obj = AT()
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assert obj.say_something(3) == "hihihi"
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assert obj.unlucky_number() == 999
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assert obj.say_everything() == "hi 999"
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for obj in [m.B_Repeat(), m.B_Tpl()]:
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 13
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assert obj.lucky_number() == 7.0
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assert obj.say_everything() == "B says hi 1 times 13"
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for obj in [m.C_Repeat(), m.C_Tpl()]:
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 4444
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assert obj.lucky_number() == 888.0
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assert obj.say_everything() == "B says hi 1 times 4444"
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class CR(m.C_Repeat):
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def lucky_number(self):
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return m.C_Repeat.lucky_number(self) + 1.25
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obj = CR()
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 4444
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assert obj.lucky_number() == 889.25
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assert obj.say_everything() == "B says hi 1 times 4444"
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class CT(m.C_Tpl):
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pass
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obj = CT()
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 4444
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assert obj.lucky_number() == 888.0
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assert obj.say_everything() == "B says hi 1 times 4444"
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class CCR(CR):
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def lucky_number(self):
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return CR.lucky_number(self) * 10
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obj = CCR()
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 4444
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assert obj.lucky_number() == 8892.5
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assert obj.say_everything() == "B says hi 1 times 4444"
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class CCT(CT):
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def lucky_number(self):
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return CT.lucky_number(self) * 1000
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obj = CCT()
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 4444
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assert obj.lucky_number() == 888000.0
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assert obj.say_everything() == "B says hi 1 times 4444"
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class DR(m.D_Repeat):
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def unlucky_number(self):
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return 123
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def lucky_number(self):
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return 42.0
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for obj in [m.D_Repeat(), m.D_Tpl()]:
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 4444
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assert obj.lucky_number() == 888.0
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assert obj.say_everything() == "B says hi 1 times 4444"
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obj = DR()
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assert obj.say_something(3) == "B says hi 3 times"
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assert obj.unlucky_number() == 123
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assert obj.lucky_number() == 42.0
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assert obj.say_everything() == "B says hi 1 times 123"
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class DT(m.D_Tpl):
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def say_something(self, times):
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return "DT says:" + (' quack' * times)
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def unlucky_number(self):
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return 1234
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def lucky_number(self):
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return -4.25
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obj = DT()
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assert obj.say_something(3) == "DT says: quack quack quack"
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assert obj.unlucky_number() == 1234
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assert obj.lucky_number() == -4.25
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assert obj.say_everything() == "DT says: quack 1234"
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class DT2(DT):
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def say_something(self, times):
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return "DT2: " + ('QUACK' * times)
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def unlucky_number(self):
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return -3
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class BT(m.B_Tpl):
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def say_something(self, times):
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return "BT" * times
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def unlucky_number(self):
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return -7
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def lucky_number(self):
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return -1.375
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obj = BT()
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assert obj.say_something(3) == "BTBTBT"
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assert obj.unlucky_number() == -7
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assert obj.lucky_number() == -1.375
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assert obj.say_everything() == "BT -7"
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