# -*- coding: utf-8 -*-
# TODO: Add tests for ClassicClass, NewStyleClass?
"""Test CLR class support."""
import clr
import Python.Test as Test
import System
import pytest
from .utils import DictProxyType
def test_basic_reference_type():
"""Test usage of CLR defined reference types."""
assert System.String.Empty == ""
def test_basic_value_type():
"""Test usage of CLR defined value types."""
assert System.Int32.MaxValue == 2147483647
def test_class_standard_attrs():
"""Test standard class attributes."""
from Python.Test import ClassTest
assert ClassTest.__name__ == 'ClassTest'
assert ClassTest.__module__ == 'Python.Test'
assert isinstance(ClassTest.__dict__, DictProxyType)
assert len(ClassTest.__doc__) > 0
def test_class_docstrings():
"""Test standard class docstring generation"""
from Python.Test import ClassTest
value = 'Void .ctor()'
assert ClassTest.__doc__ == value
def test_class_default_str():
"""Test the default __str__ implementation for managed objects."""
s = System.String("this is a test")
assert str(s) == "this is a test"
def test_class_default_repr():
"""Test the default __repr__ implementation for managed objects."""
s = System.String("this is a test")
assert repr(s).startswith(" -1) and (item < 10)
dict_ = ClassTest.GetHashtable()
for item in dict_:
cname = item.__class__.__name__
assert cname.endswith('DictionaryEntry')
def test_ienumerator_iteration():
"""Test iteration over objects supporting IEnumerator."""
from Python.Test import ClassTest
chars = ClassTest.GetEnumerator()
for item in chars:
assert item in 'test string'
def test_iterable():
"""Test what objects are Iterable"""
from collections.abc import Iterable
from Python.Test import ClassTest
assert isinstance(System.String.Empty, Iterable)
assert isinstance(ClassTest.GetArrayList(), Iterable)
assert isinstance(ClassTest.GetEnumerator(), Iterable)
assert (not isinstance(ClassTest, Iterable))
assert (not isinstance(ClassTest(), Iterable))
class ShouldBeIterable(ClassTest):
def __iter__(self):
return iter([])
assert isinstance(ShouldBeIterable(), Iterable)
def test_override_get_item():
"""Test managed subclass overriding __getitem__."""
from System.Collections import Hashtable
class MyTable(Hashtable):
def __getitem__(self, key):
value = Hashtable.__getitem__(self, key)
return 'my ' + str(value)
table = MyTable()
table['one'] = 'one'
table['two'] = 'two'
table['three'] = 'three'
assert table['one'] == 'my one'
assert table['two'] == 'my two'
assert table['three'] == 'my three'
assert table.Count == 3
def test_override_set_item():
"""Test managed subclass overriding __setitem__."""
from System.Collections import Hashtable
class MyTable(Hashtable):
def __setitem__(self, key, value):
value = 'my ' + str(value)
Hashtable.__setitem__(self, key, value)
table = MyTable()
table['one'] = 'one'
table['two'] = 'two'
table['three'] = 'three'
assert table['one'] == 'my one'
assert table['two'] == 'my two'
assert table['three'] == 'my three'
assert table.Count == 3
def test_add_and_remove_class_attribute():
from System import TimeSpan
for _ in range(100):
TimeSpan.new_method = lambda self_: self_.TotalMinutes
ts = TimeSpan.FromHours(1)
assert ts.new_method() == 60
del TimeSpan.new_method
assert not hasattr(ts, "new_method")
def test_comparisons():
from System import DateTimeOffset
from Python.Test import ClassTest
d1 = DateTimeOffset.Parse("2016-11-14")
d2 = DateTimeOffset.Parse("2016-11-15")
assert (d1 == d2) == False
assert (d1 != d2) == True
assert (d1 < d2) == True
assert (d1 <= d2) == True
assert (d1 >= d2) == False
assert (d1 > d2) == False
assert (d1 == d1) == True
assert (d1 != d1) == False
assert (d1 < d1) == False
assert (d1 <= d1) == True
assert (d1 >= d1) == True
assert (d1 > d1) == False
assert (d2 == d1) == False
assert (d2 != d1) == True
assert (d2 < d1) == False
assert (d2 <= d1) == False
assert (d2 >= d1) == True
assert (d2 > d1) == True
with pytest.raises(TypeError):
d1 < None
with pytest.raises(TypeError):
d1 < System.Guid()
# ClassTest does not implement IComparable
c1 = ClassTest()
c2 = ClassTest()
with pytest.raises(TypeError):
c1 < c2
def test_self_callback():
"""Test calling back and forth between this and a c# baseclass."""
class CallbackUser(Test.SelfCallbackTest):
def DoCallback(self):
self.PyCallbackWasCalled = False
self.SameReference = False
return self.Callback(self)
def PyCallback(self, self2):
self.PyCallbackWasCalled = True
self.SameReference = self == self2
testobj = CallbackUser()
testobj.DoCallback()
assert testobj.PyCallbackWasCalled
assert testobj.SameReference
def test_method_inheritance():
"""Ensure that we call the overridden method instead of the one provided in
the base class."""
base = Test.BaseClass()
derived = Test.DerivedClass()
assert base.IsBase() == True
assert derived.IsBase() == False
def test_callable():
"""Test that only delegate subtypes are callable"""
def foo():
pass
assert callable(System.String("foo")) == False
assert callable(System.Action(foo)) == True