# -*- coding: utf-8 -*-
# FIXME: This test module randomly passes/fails even if all tests are skipped.
# Something fishy is going on with the Test fixtures. Behavior seen on CI on
# both Linux and Windows
# TODO: Remove delay of class creations. Adding SetUp/TearDown may help
"""Test sub-classing managed types"""
import System
import pytest
from Python.Test import (IInterfaceTest, SubClassTest, EventArgsTest,
FunctionsTest)
from System.Collections.Generic import List
def interface_test_class_fixture(subnamespace):
"""Delay creation of class until test starts."""
class InterfaceTestClass(IInterfaceTest):
"""class that implements the test interface"""
__namespace__ = "Python.Test." + subnamespace
def foo(self):
return "InterfaceTestClass"
def bar(self, x, i):
return "/".join([x] * i)
return InterfaceTestClass
def derived_class_fixture(subnamespace):
"""Delay creation of class until test starts."""
class DerivedClass(SubClassTest):
"""class that derives from a class deriving from IInterfaceTest"""
__namespace__ = "Python.Test." + subnamespace
def foo(self):
return "DerivedClass"
def base_foo(self):
return SubClassTest.foo(self)
def super_foo(self):
return super(DerivedClass, self).foo()
def bar(self, x, i):
return "_".join([x] * i)
def return_list(self):
l = List[str]()
l.Add("A")
l.Add("B")
l.Add("C")
return l
return DerivedClass
def derived_event_test_class_fixture(subnamespace):
"""Delay creation of class until test starts."""
class DerivedEventTest(IInterfaceTest):
"""class that implements IInterfaceTest.TestEvent"""
__namespace__ = "Python.Test." + subnamespace
def __init__(self):
self.event_handlers = []
# event handling
def add_TestEvent(self, handler):
self.event_handlers.append(handler)
def remove_TestEvent(self, handler):
self.event_handlers.remove(handler)
def OnTestEvent(self, value):
args = EventArgsTest(value)
for handler in self.event_handlers:
handler(self, args)
return DerivedEventTest
def test_base_class():
"""Test base class managed type"""
ob = SubClassTest()
assert ob.foo() == "foo"
assert FunctionsTest.test_foo(ob) == "foo"
assert ob.bar("bar", 2) == "bar"
assert FunctionsTest.test_bar(ob, "bar", 2) == "bar"
assert ob.not_overriden() == "not_overriden"
assert list(ob.return_list()) == ["a", "b", "c"]
assert list(SubClassTest.test_list(ob)) == ["a", "b", "c"]
def test_interface():
"""Test python classes can derive from C# interfaces"""
InterfaceTestClass = interface_test_class_fixture(test_interface.__name__)
ob = InterfaceTestClass()
assert ob.foo() == "InterfaceTestClass"
assert FunctionsTest.test_foo(ob) == "InterfaceTestClass"
assert ob.bar("bar", 2) == "bar/bar"
assert FunctionsTest.test_bar(ob, "bar", 2) == "bar/bar"
# pass_through will convert from InterfaceTestClass -> IInterfaceTest,
# causing a new wrapper object to be created. Hence id will differ.
x = FunctionsTest.pass_through_interface(ob)
assert id(x) != id(ob)
def test_derived_class():
"""Test python class derived from managed type"""
DerivedClass = derived_class_fixture(test_derived_class.__name__)
ob = DerivedClass()
assert ob.foo() == "DerivedClass"
assert ob.base_foo() == "foo"
assert ob.super_foo() == "foo"
assert FunctionsTest.test_foo(ob) == "DerivedClass"
assert ob.bar("bar", 2) == "bar_bar"
assert FunctionsTest.test_bar(ob, "bar", 2) == "bar_bar"
assert ob.not_overriden() == "not_overriden"
assert list(ob.return_list()) == ["A", "B", "C"]
assert list(SubClassTest.test_list(ob)) == ["A", "B", "C"]
x = FunctionsTest.pass_through(ob)
assert id(x) == id(ob)
def test_derived_traceback():
"""Test python exception traceback in class derived from managed base"""
class DerivedClass(SubClassTest):
__namespace__ = "Python.Test.traceback"
def foo(self):
print (xyzname)
return None
import sys,traceback
ob = DerivedClass()
# direct call
try:
ob.foo()
assert False
except:
e = sys.exc_info()
assert "xyzname" in str(e[1])
location = traceback.extract_tb(e[2])[-1]
assert location[2] == "foo"
# call through managed code
try:
FunctionsTest.test_foo(ob)
assert False
except:
e = sys.exc_info()
assert "xyzname" in str(e[1])
location = traceback.extract_tb(e[2])[-1]
assert location[2] == "foo"
def test_create_instance():
"""Test derived instances can be created from managed code"""
DerivedClass = derived_class_fixture(test_create_instance.__name__)
ob = FunctionsTest.create_instance(DerivedClass)
assert ob.foo() == "DerivedClass"
assert FunctionsTest.test_foo(ob) == "DerivedClass"
assert ob.bar("bar", 2) == "bar_bar"
assert FunctionsTest.test_bar(ob, "bar", 2) == "bar_bar"
assert ob.not_overriden() == "not_overriden"
x = FunctionsTest.pass_through(ob)
assert id(x) == id(ob)
InterfaceTestClass = interface_test_class_fixture(test_create_instance.__name__)
ob2 = FunctionsTest.create_instance_interface(InterfaceTestClass)
assert ob2.foo() == "InterfaceTestClass"
assert FunctionsTest.test_foo(ob2) == "InterfaceTestClass"
assert ob2.bar("bar", 2) == "bar/bar"
assert FunctionsTest.test_bar(ob2, "bar", 2) == "bar/bar"
y = FunctionsTest.pass_through_interface(ob2)
assert id(y) != id(ob2)
def test_events():
class EventHandler(object):
def handler(self, x, args):
self.value = args.value
event_handler = EventHandler()
x = SubClassTest()
x.TestEvent += event_handler.handler
assert FunctionsTest.test_event(x, 1) == 1
assert event_handler.value == 1
InterfaceTestClass = interface_test_class_fixture(test_events.__name__)
i = InterfaceTestClass()
with pytest.raises(System.NotImplementedException):
FunctionsTest.test_event(i, 2)
DerivedEventTest = derived_event_test_class_fixture(test_events.__name__)
d = DerivedEventTest()
d.add_TestEvent(event_handler.handler)
assert FunctionsTest.test_event(d, 3) == 3
assert event_handler.value == 3
assert len(d.event_handlers) == 1
def test_isinstance_check():
a = [str(x) for x in range(0, 1000)]
b = [System.String(x) for x in a]
for x in a:
assert not isinstance(x, System.Object)
assert not isinstance(x, System.String)
for x in b:
assert isinstance(x, System.Object)
assert isinstance(x, System.String)
def test_namespace_and_init():
calls = []
class TestX(System.Object):
__namespace__ = "test_clr_subclass_with_init_args"
def __init__(self, *args, **kwargs):
calls.append((args, kwargs))
t = TestX(1,2,3,foo="bar")
assert len(calls) == 1
assert calls[0][0] == (1,2,3)
assert calls[0][1] == {"foo":"bar"}
def test_namespace_and_argless_init():
calls = []
class TestX(System.Object):
__namespace__ = "test_clr_subclass_without_init_args"
def __init__(self):
calls.append(True)
t = TestX()
assert len(calls) == 1
assert calls[0] == True
def test_namespace_and_no_init():
class TestX(System.Object):
__namespace__ = "test_clr_subclass_without_init"
q = 1
t = TestX()
assert t.q == 1
def test_construction_from_clr():
import clr
calls = []
class TestX(System.Object):
__namespace__ = "test_clr_subclass_init_from_clr"
@clr.clrmethod(None, [int, str])
def __init__(self, i, s):
calls.append((i, s))
# Construct a TestX from Python
t = TestX(1, "foo")
assert len(calls) == 1
assert calls[0][0] == 1
assert calls[0][1] == "foo"
# Reset calls and construct a TestX from CLR
calls = []
tp = t.GetType()
t2 = tp.GetConstructors()[0].Invoke(None)
assert len(calls) == 0
# The object has only been constructed, now it needs to be initialized as well
tp.GetMethod("__init__").Invoke(t2, [1, "foo"])
assert len(calls) == 1
assert calls[0][0] == 1
assert calls[0][1] == "foo"