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