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85d63c3bcd
This didn't actually affect anything (because all the MI3 constructor does is invoke MI2 with the same arguments anyway).
349 lines
8.9 KiB
Python
349 lines
8.9 KiB
Python
import pytest
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from pybind11_tests import ConstructorStats
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from pybind11_tests import multiple_inheritance as m
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def test_multiple_inheritance_cpp():
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mt = m.MIType(3, 4)
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assert mt.foo() == 3
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assert mt.bar() == 4
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def test_multiple_inheritance_mix1():
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class Base1:
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def __init__(self, i):
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self.i = i
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def foo(self):
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return self.i
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class MITypePy(Base1, m.Base2):
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def __init__(self, i, j):
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Base1.__init__(self, i)
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m.Base2.__init__(self, j)
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mt = MITypePy(3, 4)
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assert mt.foo() == 3
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assert mt.bar() == 4
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def test_multiple_inheritance_mix2():
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class Base2:
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def __init__(self, i):
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self.i = i
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def bar(self):
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return self.i
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class MITypePy(m.Base1, Base2):
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def __init__(self, i, j):
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m.Base1.__init__(self, i)
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Base2.__init__(self, j)
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mt = MITypePy(3, 4)
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assert mt.foo() == 3
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assert mt.bar() == 4
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def test_multiple_inheritance_python():
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class MI1(m.Base1, m.Base2):
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def __init__(self, i, j):
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m.Base1.__init__(self, i)
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m.Base2.__init__(self, j)
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class B1(object):
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def v(self):
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return 1
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class MI2(B1, m.Base1, m.Base2):
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def __init__(self, i, j):
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B1.__init__(self)
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m.Base1.__init__(self, i)
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m.Base2.__init__(self, j)
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class MI3(MI2):
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def __init__(self, i, j):
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MI2.__init__(self, i, j)
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class MI4(MI3, m.Base2):
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def __init__(self, i, j, k):
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MI3.__init__(self, j, k)
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m.Base2.__init__(self, i)
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class MI5(m.Base2, B1, m.Base1):
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def __init__(self, i, j):
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B1.__init__(self)
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m.Base1.__init__(self, i)
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m.Base2.__init__(self, j)
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class MI6(m.Base2, B1):
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def __init__(self, i):
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m.Base2.__init__(self, i)
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B1.__init__(self)
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class B2(B1):
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def v(self):
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return 2
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class B3(object):
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def v(self):
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return 3
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class B4(B3, B2):
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def v(self):
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return 4
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class MI7(B4, MI6):
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def __init__(self, i):
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B4.__init__(self)
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MI6.__init__(self, i)
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class MI8(MI6, B3):
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def __init__(self, i):
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MI6.__init__(self, i)
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B3.__init__(self)
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class MI8b(B3, MI6):
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def __init__(self, i):
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B3.__init__(self)
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MI6.__init__(self, i)
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mi1 = MI1(1, 2)
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assert mi1.foo() == 1
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assert mi1.bar() == 2
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mi2 = MI2(3, 4)
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assert mi2.v() == 1
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assert mi2.foo() == 3
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assert mi2.bar() == 4
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mi3 = MI3(5, 6)
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assert mi3.v() == 1
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assert mi3.foo() == 5
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assert mi3.bar() == 6
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mi4 = MI4(7, 8, 9)
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assert mi4.v() == 1
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assert mi4.foo() == 8
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assert mi4.bar() == 7
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mi5 = MI5(10, 11)
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assert mi5.v() == 1
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assert mi5.foo() == 10
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assert mi5.bar() == 11
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mi6 = MI6(12)
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assert mi6.v() == 1
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assert mi6.bar() == 12
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mi7 = MI7(13)
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assert mi7.v() == 4
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assert mi7.bar() == 13
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mi8 = MI8(14)
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assert mi8.v() == 1
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assert mi8.bar() == 14
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mi8b = MI8b(15)
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assert mi8b.v() == 3
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assert mi8b.bar() == 15
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def test_multiple_inheritance_python_many_bases():
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class MIMany14(m.BaseN1, m.BaseN2, m.BaseN3, m.BaseN4):
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def __init__(self):
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m.BaseN1.__init__(self, 1)
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m.BaseN2.__init__(self, 2)
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m.BaseN3.__init__(self, 3)
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m.BaseN4.__init__(self, 4)
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class MIMany58(m.BaseN5, m.BaseN6, m.BaseN7, m.BaseN8):
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def __init__(self):
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m.BaseN5.__init__(self, 5)
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m.BaseN6.__init__(self, 6)
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m.BaseN7.__init__(self, 7)
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m.BaseN8.__init__(self, 8)
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class MIMany916(m.BaseN9, m.BaseN10, m.BaseN11, m.BaseN12, m.BaseN13, m.BaseN14, m.BaseN15,
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m.BaseN16):
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def __init__(self):
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m.BaseN9.__init__(self, 9)
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m.BaseN10.__init__(self, 10)
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m.BaseN11.__init__(self, 11)
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m.BaseN12.__init__(self, 12)
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m.BaseN13.__init__(self, 13)
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m.BaseN14.__init__(self, 14)
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m.BaseN15.__init__(self, 15)
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m.BaseN16.__init__(self, 16)
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class MIMany19(MIMany14, MIMany58, m.BaseN9):
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def __init__(self):
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MIMany14.__init__(self)
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MIMany58.__init__(self)
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m.BaseN9.__init__(self, 9)
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class MIMany117(MIMany14, MIMany58, MIMany916, m.BaseN17):
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def __init__(self):
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MIMany14.__init__(self)
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MIMany58.__init__(self)
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MIMany916.__init__(self)
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m.BaseN17.__init__(self, 17)
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# Inherits from 4 registered C++ classes: can fit in one pointer on any modern arch:
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a = MIMany14()
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for i in range(1, 4):
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assert getattr(a, "f" + str(i))() == 2 * i
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# Inherits from 8: requires 1/2 pointers worth of holder flags on 32/64-bit arch:
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b = MIMany916()
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for i in range(9, 16):
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assert getattr(b, "f" + str(i))() == 2 * i
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# Inherits from 9: requires >= 2 pointers worth of holder flags
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c = MIMany19()
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for i in range(1, 9):
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assert getattr(c, "f" + str(i))() == 2 * i
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# Inherits from 17: requires >= 3 pointers worth of holder flags
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d = MIMany117()
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for i in range(1, 17):
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assert getattr(d, "f" + str(i))() == 2 * i
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def test_multiple_inheritance_virtbase():
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class MITypePy(m.Base12a):
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def __init__(self, i, j):
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m.Base12a.__init__(self, i, j)
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mt = MITypePy(3, 4)
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assert mt.bar() == 4
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assert m.bar_base2a(mt) == 4
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assert m.bar_base2a_sharedptr(mt) == 4
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def test_mi_static_properties():
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"""Mixing bases with and without static properties should be possible
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and the result should be independent of base definition order"""
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for d in (m.VanillaStaticMix1(), m.VanillaStaticMix2()):
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assert d.vanilla() == "Vanilla"
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assert d.static_func1() == "WithStatic1"
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assert d.static_func2() == "WithStatic2"
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assert d.static_func() == d.__class__.__name__
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m.WithStatic1.static_value1 = 1
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m.WithStatic2.static_value2 = 2
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assert d.static_value1 == 1
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assert d.static_value2 == 2
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assert d.static_value == 12
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d.static_value1 = 0
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assert d.static_value1 == 0
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d.static_value2 = 0
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assert d.static_value2 == 0
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d.static_value = 0
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assert d.static_value == 0
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@pytest.unsupported_on_pypy
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def test_mi_dynamic_attributes():
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"""Mixing bases with and without dynamic attribute support"""
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for d in (m.VanillaDictMix1(), m.VanillaDictMix2()):
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d.dynamic = 1
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assert d.dynamic == 1
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def test_mi_unaligned_base():
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"""Returning an offset (non-first MI) base class pointer should recognize the instance"""
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n_inst = ConstructorStats.detail_reg_inst()
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c = m.I801C()
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d = m.I801D()
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# + 4 below because we have the two instances, and each instance has offset base I801B2
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assert ConstructorStats.detail_reg_inst() == n_inst + 4
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b1c = m.i801b1_c(c)
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assert b1c is c
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b2c = m.i801b2_c(c)
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assert b2c is c
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b1d = m.i801b1_d(d)
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assert b1d is d
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b2d = m.i801b2_d(d)
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assert b2d is d
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assert ConstructorStats.detail_reg_inst() == n_inst + 4 # no extra instances
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del c, b1c, b2c
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assert ConstructorStats.detail_reg_inst() == n_inst + 2
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del d, b1d, b2d
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assert ConstructorStats.detail_reg_inst() == n_inst
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def test_mi_base_return():
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"""Tests returning an offset (non-first MI) base class pointer to a derived instance"""
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n_inst = ConstructorStats.detail_reg_inst()
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c1 = m.i801c_b1()
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assert type(c1) is m.I801C
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assert c1.a == 1
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assert c1.b == 2
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d1 = m.i801d_b1()
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assert type(d1) is m.I801D
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assert d1.a == 1
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assert d1.b == 2
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assert ConstructorStats.detail_reg_inst() == n_inst + 4
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c2 = m.i801c_b2()
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assert type(c2) is m.I801C
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assert c2.a == 1
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assert c2.b == 2
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d2 = m.i801d_b2()
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assert type(d2) is m.I801D
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assert d2.a == 1
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assert d2.b == 2
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assert ConstructorStats.detail_reg_inst() == n_inst + 8
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del c2
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assert ConstructorStats.detail_reg_inst() == n_inst + 6
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del c1, d1, d2
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assert ConstructorStats.detail_reg_inst() == n_inst
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# Returning an unregistered derived type with a registered base; we won't
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# pick up the derived type, obviously, but should still work (as an object
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# of whatever type was returned).
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e1 = m.i801e_c()
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assert type(e1) is m.I801C
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assert e1.a == 1
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assert e1.b == 2
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e2 = m.i801e_b2()
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assert type(e2) is m.I801B2
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assert e2.b == 2
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def test_diamond_inheritance():
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"""Tests that diamond inheritance works as expected (issue #959)"""
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# Issue #959: this shouldn't segfault:
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d = m.D()
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# Make sure all the various distinct pointers are all recognized as registered instances:
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assert d is d.c0()
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assert d is d.c1()
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assert d is d.b()
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assert d is d.c0().b()
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assert d is d.c1().b()
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assert d is d.c0().c1().b().c0().b()
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