blob: 611a2870e30f717187111e15c84419fba341c82a [file] [log] [blame]
Dean Moldovan83e328f2017-06-09 00:44:49 +02001import pytest
2
3from pybind11_tests import class_ as m
4from pybind11_tests import UserType, ConstructorStats
5
6
7def test_repr():
8 # In Python 3.3+, repr() accesses __qualname__
9 assert "pybind11_type" in repr(type(UserType))
10 assert "UserType" in repr(UserType)
11
12
13def test_instance(msg):
14 with pytest.raises(TypeError) as excinfo:
15 m.NoConstructor()
16 assert msg(excinfo.value) == "m.class_.NoConstructor: No constructor defined!"
17
18 instance = m.NoConstructor.new_instance()
19
20 cstats = ConstructorStats.get(m.NoConstructor)
21 assert cstats.alive() == 1
22 del instance
23 assert cstats.alive() == 0
24
25
26def test_docstrings(doc):
27 assert doc(UserType) == "A `py::class_` type for testing"
28 assert UserType.__name__ == "UserType"
29 assert UserType.__module__ == "pybind11_tests"
30 assert UserType.get_value.__name__ == "get_value"
31 assert UserType.get_value.__module__ == "pybind11_tests"
32
33 assert doc(UserType.get_value) == """
34 get_value(self: m.UserType) -> int
35
36 Get value using a method
37 """
38 assert doc(UserType.value) == "Get value using a property"
39
40 assert doc(m.NoConstructor.new_instance) == """
41 new_instance() -> m.class_.NoConstructor
42
43 Return an instance
44 """
Dean Moldovan0bc272b2017-06-22 23:42:11 +020045
46
47def test_inheritance(msg):
48 roger = m.Rabbit('Rabbit')
49 assert roger.name() + " is a " + roger.species() == "Rabbit is a parrot"
50 assert m.pet_name_species(roger) == "Rabbit is a parrot"
51
52 polly = m.Pet('Polly', 'parrot')
53 assert polly.name() + " is a " + polly.species() == "Polly is a parrot"
54 assert m.pet_name_species(polly) == "Polly is a parrot"
55
56 molly = m.Dog('Molly')
57 assert molly.name() + " is a " + molly.species() == "Molly is a dog"
58 assert m.pet_name_species(molly) == "Molly is a dog"
59
60 fred = m.Hamster('Fred')
61 assert fred.name() + " is a " + fred.species() == "Fred is a rodent"
62
63 assert m.dog_bark(molly) == "Woof!"
64
65 with pytest.raises(TypeError) as excinfo:
66 m.dog_bark(polly)
67 assert msg(excinfo.value) == """
68 dog_bark(): incompatible function arguments. The following argument types are supported:
69 1. (arg0: m.class_.Dog) -> str
70
71 Invoked with: <m.class_.Pet object at 0>
72 """
73
74 with pytest.raises(TypeError) as excinfo:
75 m.Chimera("lion", "goat")
76 assert "No constructor defined!" in str(excinfo.value)
77
78
79def test_automatic_upcasting():
80 assert type(m.return_class_1()).__name__ == "DerivedClass1"
81 assert type(m.return_class_2()).__name__ == "DerivedClass2"
82 assert type(m.return_none()).__name__ == "NoneType"
83 # Repeat these a few times in a random order to ensure no invalid caching is applied
84 assert type(m.return_class_n(1)).__name__ == "DerivedClass1"
85 assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
86 assert type(m.return_class_n(0)).__name__ == "BaseClass"
87 assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
88 assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
89 assert type(m.return_class_n(0)).__name__ == "BaseClass"
90 assert type(m.return_class_n(1)).__name__ == "DerivedClass1"
91
92
93def test_isinstance():
94 objects = [tuple(), dict(), m.Pet("Polly", "parrot")] + [m.Dog("Molly")] * 4
95 expected = (True, True, True, True, True, False, False)
96 assert m.check_instances(objects) == expected
97
98
99def test_mismatched_holder():
100 import re
101
102 with pytest.raises(RuntimeError) as excinfo:
103 m.mismatched_holder_1()
104 assert re.match('generic_type: type ".*MismatchDerived1" does not have a non-default '
105 'holder type while its base ".*MismatchBase1" does', str(excinfo.value))
106
107 with pytest.raises(RuntimeError) as excinfo:
108 m.mismatched_holder_2()
109 assert re.match('generic_type: type ".*MismatchDerived2" has a non-default holder type '
110 'while its base ".*MismatchBase2" does not', str(excinfo.value))
111
112
113def test_override_static():
114 """#511: problem with inheritance + overwritten def_static"""
115 b = m.MyBase.make()
116 d1 = m.MyDerived.make2()
117 d2 = m.MyDerived.make()
118
119 assert isinstance(b, m.MyBase)
120 assert isinstance(d1, m.MyDerived)
121 assert isinstance(d2, m.MyDerived)
Dean Moldovanaf2dda32017-06-26 20:34:06 +0200122
123
124def test_implicit_conversion_life_support():
125 """Ensure the lifetime of temporary objects created for implicit conversions"""
126 assert m.implicitly_convert_argument(UserType(5)) == 5
127 assert m.implicitly_convert_variable(UserType(5)) == 5
128
129 assert "outside a bound function" in m.implicitly_convert_variable_fail(UserType(5))