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 v3.0.0

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test_interface.py

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# -*- coding: utf-8 -*-

"""Test CLR interface support."""

import Python.Test as Test

import pytest

from .utils import DictProxyType

def test_interface_standard_attrs():

"""Test standard class attributes."""

from Python.Test import IPublicInterface

assert IPublicInterface.__name__ == 'IPublicInterface'

assert IPublicInterface.__module__ == 'Python.Test'

assert isinstance(IPublicInterface.__dict__, DictProxyType)

def test_global_interface_visibility():

"""Test visibility of module-level interfaces."""

from Python.Test import IPublicInterface

assert IPublicInterface.__name__ == 'IPublicInterface'

with pytest.raises(ImportError):

from Python.Test import IInternalInterface

_ = IInternalInterface

with pytest.raises(AttributeError):

_ = Test.IInternalInterface

def test_nested_interface_visibility():

"""Test visibility of nested interfaces."""

from Python.Test import InterfaceTest

ob = InterfaceTest.IPublic

assert ob.__name__ == 'IPublic'

ob = InterfaceTest.IProtected

assert ob.__name__ == 'IProtected'

with pytest.raises(AttributeError):

_ = InterfaceTest.IInternal

with pytest.raises(AttributeError):

_ = InterfaceTest.IPrivate

def test_explicit_cast_to_interface():

"""Test explicit cast to an interface."""

from Python.Test import InterfaceTest

ob = InterfaceTest()

assert type(ob).__name__ == 'InterfaceTest'

assert hasattr(ob, 'HelloProperty')

i1 = Test.ISayHello1(ob)

assert type(i1).__name__ == 'ISayHello1'

assert hasattr(i1, 'SayHello')

assert i1.SayHello() == 'hello 1'

assert not hasattr(i1, 'HelloProperty')

assert i1.__implementation__ == ob

assert i1.__raw_implementation__ == ob

i2 = Test.ISayHello2(ob)

assert type(i2).__name__ == 'ISayHello2'

assert i2.SayHello() == 'hello 2'

assert hasattr(i2, 'SayHello')

assert not hasattr(i2, 'HelloProperty')

def test_interface_object_returned_through_method():

"""Test interface type is used if method return type is interface"""

from Python.Test import InterfaceTest

ob = InterfaceTest()

hello1 = ob.GetISayHello1()

assert type(hello1).__name__ == 'ISayHello1'

assert hello1.__implementation__.__class__.__name__ == "InterfaceTest"

assert hello1.SayHello() == 'hello 1'

def test_interface_object_returned_through_out_param():

"""Test interface type is used for out parameters of interface types"""

from Python.Test import InterfaceTest

ob = InterfaceTest()

hello2 = ob.GetISayHello2(None)

assert type(hello2).__name__ == 'ISayHello2'

assert hello2.SayHello() == 'hello 2'

def test_interface_out_param_python_impl():

from Python.Test import IOutArg, OutArgCaller

class MyOutImpl(IOutArg):

__namespace__ = "Python.Test"

def MyMethod_Out(self, name, index):

other_index = 101

return ('MyName', other_index)

py_impl = MyOutImpl()

assert 101 == OutArgCaller.CallMyMethod_Out(py_impl)

def test_null_interface_object_returned():

"""Test None is used also for methods with interface return types"""

from Python.Test import InterfaceTest

ob = InterfaceTest()

hello1, hello2 = ob.GetNoSayHello(None)

assert hello1 is None

assert hello2 is None

def test_interface_array_returned():

"""Test interface type used for methods returning interface arrays"""

from Python.Test import InterfaceTest

ob = InterfaceTest()

hellos = ob.GetISayHello1Array()

assert type(hellos[0]).__name__ == 'ISayHello1'

assert hellos[0].__implementation__.__class__.__name__ == "InterfaceTest"

def test_implementation_access():

"""Test the __implementation__ and __raw_implementation__ properties"""

import System

clrVal = System.Int32(100)

i = System.IComparable(clrVal)

assert 100 == i.__implementation__

assert clrVal == i.__raw_implementation__

assert i.__implementation__ != i.__raw_implementation__

def test_interface_collection_iteration():

"""Test interface type is used when iterating over interface collection"""

import System

from System.Collections.Generic import List

elem = System.IComparable(System.Int32(100))

typed_list = List[System.IComparable]()

typed_list.Add(elem)

for e in typed_list:

assert type(e).__name__ == "IComparable"

untyped_list = System.Collections.ArrayList()

untyped_list.Add(elem)

for e in untyped_list:

assert type(e).__name__ == "int"

def test_methods_of_Object_are_available():

"""Test calling methods inherited from Object"""

import System

clrVal = System.Int32(100)

i = System.IComparable(clrVal)

assert i.Equals(clrVal)

assert clrVal.GetHashCode() == i.GetHashCode()

assert clrVal.GetType() == i.GetType()

assert clrVal.ToString() == i.ToString()