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import pytest
def test_property_name_in_error():
class A:
@property
def my_funny_attribute(self):
return 1
unreadable = property()
@unreadable.setter
def even_funnier(self, value):
pass
with pytest.raises(AttributeError) as info:
A().my_funny_attribute = 1
assert "my_funny_attribute" in str(info.value)
with pytest.raises(AttributeError) as info:
del A().my_funny_attribute
assert "my_funny_attribute" in str(info.value)
with pytest.raises(AttributeError) as info:
A().even_funnier
assert "even_funnier" in str(info.value)
def test_property_name_in_error_setter():
class A:
pass
p = property(lambda self: 1)
p.__set_name__(A, "it_propagates")
p = p.setter(lambda self, value: None)
with pytest.raises(AttributeError) as info:
p.__delete__(A())
assert "it_propagates" in str(info.value)
def test_property_class_qualname_in_error():
class ThisNiceNewFeature:
@property
def my_funny_attribute(self):
return 1
unreadable = property()
@unreadable.setter
def even_funnier(self, value):
pass
with pytest.raises(AttributeError) as info:
ThisNiceNewFeature().my_funny_attribute = 1
assert str(info.value) == "property 'my_funny_attribute' of 'test_property_class_qualname_in_error.<locals>.ThisNiceNewFeature' object has no setter"
with pytest.raises(AttributeError) as info:
del ThisNiceNewFeature().my_funny_attribute
assert "ThisNiceNewFeature" in str(info.value)
with pytest.raises(AttributeError) as info:
ThisNiceNewFeature().unreadable
assert "ThisNiceNewFeature" in str(info.value)
def test_dont_segfault():
class pro(property):
def __new__(typ, *args, **kwargs):
return "abcdef"
class A:
pass
p = property.__new__(pro)
p.__set_name__(A, 1)
p.getter(lambda self: 1) # must not crash
def test_super_error_message():
with raises(TypeError) as info:
super(1, int)
assert str(info.value) == "super() argument 1 must be a type, not int"
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