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# -*- coding: utf-8 -*-
"""Test CLR property support."""
import pytest
from Python.Test import PropertyTest
def test_public_instance_property():
"""Test public instance properties."""
ob = PropertyTest()
assert ob.PublicProperty == 0
ob.PublicProperty = 1
assert ob.PublicProperty == 1
with pytest.raises(TypeError):
del PropertyTest().PublicProperty
def test_public_static_property():
"""Test public static properties."""
ob = PropertyTest()
assert PropertyTest.PublicStaticProperty == 0
PropertyTest.PublicStaticProperty = 1
assert PropertyTest.PublicStaticProperty == 1
assert ob.PublicStaticProperty == 1
ob.PublicStaticProperty = 0
assert ob.PublicStaticProperty == 0
with pytest.raises(TypeError):
del PropertyTest.PublicStaticProperty
with pytest.raises(TypeError):
del PropertyTest().PublicStaticProperty
def test_protected_instance_property():
"""Test protected instance properties."""
ob = PropertyTest()
assert ob.ProtectedProperty == 0
ob.ProtectedProperty = 1
assert ob.ProtectedProperty == 1
with pytest.raises(TypeError):
del PropertyTest().ProtectedProperty
def test_protected_static_property():
"""Test protected static properties."""
ob = PropertyTest()
assert PropertyTest.ProtectedStaticProperty == 0
PropertyTest.ProtectedStaticProperty = 1
assert PropertyTest.ProtectedStaticProperty == 1
assert ob.ProtectedStaticProperty == 1
ob.ProtectedStaticProperty = 0
assert ob.ProtectedStaticProperty == 0
with pytest.raises(TypeError):
del PropertyTest.ProtectedStaticProperty
with pytest.raises(TypeError):
del PropertyTest().ProtectedStaticProperty
def test_internal_property():
"""Test internal properties."""
with pytest.raises(AttributeError):
_ = PropertyTest().InternalProperty
with pytest.raises(AttributeError):
_ = PropertyTest().InternalStaticProperty
with pytest.raises(AttributeError):
_ = PropertyTest.InternalStaticProperty
def test_private_property():
"""Test private properties."""
with pytest.raises(AttributeError):
_ = PropertyTest().PrivateProperty
with pytest.raises(AttributeError):
_ = PropertyTest().PrivateStaticProperty
with pytest.raises(AttributeError):
_ = PropertyTest.PrivateStaticProperty
def test_property_descriptor_get_set():
"""Test property descriptor get / set."""
# This test ensures that setting an attribute implemented with
# a descriptor actually goes through the descriptor (rather than
# silently replacing the descriptor in the instance or type dict.
ob = PropertyTest()
assert PropertyTest.PublicStaticProperty == 0
assert ob.PublicStaticProperty == 0
descriptor = PropertyTest.__dict__['PublicStaticProperty']
assert type(descriptor) != int
ob.PublicStaticProperty = 0
descriptor = PropertyTest.__dict__['PublicStaticProperty']
assert type(descriptor) != int
PropertyTest.PublicStaticProperty = 0
descriptor = PropertyTest.__dict__['PublicStaticProperty']
assert type(descriptor) != int
def test_property_descriptor_wrong_type():
"""Test setting a property using a value of the wrong type."""
with pytest.raises(TypeError):
ob = PropertyTest()
ob.PublicProperty = "spam"
def test_property_descriptor_abuse():
"""Test property descriptor abuse."""
desc = PropertyTest.__dict__['PublicProperty']
with pytest.raises(TypeError):
desc.__get__(0, 0)
with pytest.raises(TypeError):
desc.__set__(0, 0)
def test_interface_property():
"""Test properties of interfaces. Added after a bug report
that an IsAbstract check was inappropriate and prevented
use of properties when only the interface is known."""
from System.Collections import Hashtable, ICollection
mapping = Hashtable()
coll = ICollection(mapping)
assert coll.Count == 0
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