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75 lines
2.6 KiB
Python
75 lines
2.6 KiB
Python
import pytest
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from pybind11_tests import class_sh_disowning as m
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def test_same_twice():
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while True:
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obj1a = m.Atype1(57)
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obj1b = m.Atype1(62)
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assert m.same_twice(obj1a, obj1b) == (57 * 10 + 1) * 100 + (62 * 10 + 1) * 10
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obj1c = m.Atype1(0)
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with pytest.raises(ValueError):
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# Disowning works for one argument, but not both.
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m.same_twice(obj1c, obj1c)
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with pytest.raises(ValueError):
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obj1c.get()
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return # Comment out for manual leak checking (use `top` command).
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def test_mixed():
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first_pass = True
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while True:
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obj1a = m.Atype1(90)
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obj2a = m.Atype2(25)
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assert m.mixed(obj1a, obj2a) == (90 * 10 + 1) * 200 + (25 * 10 + 2) * 20
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# The C++ order of evaluation of function arguments is (unfortunately) unspecified:
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# https://en.cppreference.com/w/cpp/language/eval_order
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# Read on.
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obj1b = m.Atype1(0)
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with pytest.raises(ValueError):
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# If the 1st argument is evaluated first, obj1b is disowned before the conversion for
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# the already disowned obj2a fails as expected.
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m.mixed(obj1b, obj2a)
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obj2b = m.Atype2(0)
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with pytest.raises(ValueError):
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# If the 2nd argument is evaluated first, obj2b is disowned before the conversion for
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# the already disowned obj1a fails as expected.
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m.mixed(obj1a, obj2b)
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def is_disowned(obj):
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try:
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obj.get()
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except ValueError:
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return True
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return False
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# Either obj1b or obj2b was disowned in the expected failed m.mixed() calls above, but not
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# both.
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is_disowned_results = (is_disowned(obj1b), is_disowned(obj2b))
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assert is_disowned_results.count(True) == 1
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if first_pass:
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first_pass = False
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print(
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"\nC++ function argument %d is evaluated first."
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% (is_disowned_results.index(True) + 1)
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)
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return # Comment out for manual leak checking (use `top` command).
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def test_overloaded():
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while True:
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obj1 = m.Atype1(81)
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obj2 = m.Atype2(60)
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with pytest.raises(TypeError):
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m.overloaded(obj1, "NotInt")
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assert obj1.get() == 81 * 10 + 1 # Not disowned.
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assert m.overloaded(obj1, 3) == (81 * 10 + 1) * 30 + 3
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with pytest.raises(TypeError):
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m.overloaded(obj2, "NotInt")
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assert obj2.get() == 60 * 10 + 2 # Not disowned.
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assert m.overloaded(obj2, 2) == (60 * 10 + 2) * 40 + 2
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return # Comment out for manual leak checking (use `top` command).
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