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pythonnet/src/tests/test_delegate.py at master · sdpython/pythonnet · GitHub
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# -*- coding: utf-8 -*-
"""Test CLR delegate support."""
import
Python
.
Test
as
Test
import
System
import
pytest
from
Python
.
Test
import
DelegateTest
,
StringDelegate
from
.
utils
import
HelloClass
,
hello_func
,
MultipleHandler
,
DictProxyType
def
test_delegate_standard_attrs
():
"""Test standard delegate attributes."""
from
Python
.
Test
import
PublicDelegate
assert
PublicDelegate
.
__name__
==
'PublicDelegate'
assert
PublicDelegate
.
__module__
==
'Python.Test'
assert
isinstance
(
PublicDelegate
.
__dict__
,
DictProxyType
)
assert
PublicDelegate
.
__doc__
is
None
def
test_global_delegate_visibility
():
"""Test visibility of module-level delegates."""
from
Python
.
Test
import
PublicDelegate
assert
PublicDelegate
.
__name__
==
'PublicDelegate'
assert
Test
.
PublicDelegate
.
__name__
==
'PublicDelegate'
with
pytest
.
raises
(
ImportError
):
from
Python
.
Test
import
InternalDelegate
_
=
InternalDelegate
with
pytest
.
raises
(
AttributeError
):
_
=
Test
.
InternalDelegate
def
test_nested_delegate_visibility
():
"""Test visibility of nested delegates."""
ob
=
DelegateTest
.
PublicDelegate
assert
ob
.
__name__
==
'PublicDelegate'
ob
=
DelegateTest
.
ProtectedDelegate
assert
ob
.
__name__
==
'ProtectedDelegate'
with
pytest
.
raises
(
AttributeError
):
_
=
DelegateTest
.
InternalDelegate
with
pytest
.
raises
(
AttributeError
):
_
=
DelegateTest
.
PrivateDelegate
def
test_delegate_from_function
():
"""Test delegate implemented with a Python function."""
d
=
StringDelegate
(
hello_func
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_from_method
():
"""Test delegate implemented with a Python instance method."""
inst
=
HelloClass
()
d
=
StringDelegate
(
inst
.
hello
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_from_unbound_method
():
"""Test failure mode for unbound methods."""
with
pytest
.
raises
(
TypeError
):
d
=
StringDelegate
(
HelloClass
.
hello
)
d
()
def
test_delegate_from_static_method
():
"""Test delegate implemented with a Python static method."""
d
=
StringDelegate
(
HelloClass
.
s_hello
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
inst
=
HelloClass
()
d
=
StringDelegate
(
inst
.
s_hello
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_from_class_method
():
"""Test delegate implemented with a Python class method."""
d
=
StringDelegate
(
HelloClass
.
c_hello
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
inst
=
HelloClass
()
d
=
StringDelegate
(
inst
.
c_hello
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_from_callable
():
"""Test delegate implemented with a Python callable object."""
inst
=
HelloClass
()
d
=
StringDelegate
(
inst
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_from_managed_instance_method
():
"""Test delegate implemented with a managed instance method."""
ob
=
DelegateTest
()
d
=
StringDelegate
(
ob
.
SayHello
)
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_from_managed_static_method
():
"""Test delegate implemented with a managed static method."""
d
=
StringDelegate
(
DelegateTest
.
StaticSayHello
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d
)
==
"hello"
assert
d
()
==
"hello"
ob
.
stringDelegate
=
d
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_from_delegate
():
"""Test delegate implemented with another delegate."""
d1
=
StringDelegate
(
hello_func
)
d2
=
StringDelegate
(
d1
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
d2
)
==
"hello"
assert
d2
()
==
"hello"
ob
.
stringDelegate
=
d2
assert
ob
.
CallStringDelegate
(
ob
.
stringDelegate
)
==
"hello"
assert
ob
.
stringDelegate
()
==
"hello"
def
test_delegate_with_invalid_args
():
"""Test delegate instantiation with invalid (non-callable) args."""
with
pytest
.
raises
(
TypeError
):
_
=
StringDelegate
(
None
)
with
pytest
.
raises
(
TypeError
):
_
=
StringDelegate
(
"spam"
)
with
pytest
.
raises
(
TypeError
):
_
=
StringDelegate
(
1
)
def
test_multicast_delegate
():
"""Test multicast delegates."""
inst
=
MultipleHandler
()
d1
=
StringDelegate
(
inst
.
count
)
d2
=
StringDelegate
(
inst
.
count
)
md
=
System
.
Delegate
.
Combine
(
d1
,
d2
)
ob
=
DelegateTest
()
assert
ob
.
CallStringDelegate
(
md
)
==
"ok"
assert
inst
.
value
==
2
assert
md
()
==
"ok"
assert
inst
.
value
==
4
def
test_subclass_delegate_fails
():
"""Test that subclassing of a delegate type fails."""
from
Python
.
Test
import
PublicDelegate
with
pytest
.
raises
(
TypeError
):
class
Boom
(
PublicDelegate
):
pass
_
=
Boom
def
test_delegate_equality
():
"""Test delegate equality."""
d
=
StringDelegate
(
hello_func
)
ob
=
DelegateTest
()
ob
.
stringDelegate
=
d
assert
ob
.
stringDelegate
==
d
def
test_bool_delegate
():
"""Test boolean delegate."""
from
Python
.
Test
import
BoolDelegate
def
always_so_negative
():
return
0
d
=
BoolDelegate
(
always_so_negative
)
ob
=
DelegateTest
()
ob
.
CallBoolDelegate
(
d
)
assert
not
d
()
assert
not
ob
.
CallBoolDelegate
(
d
)
def
test_object_delegate
():
"""Test object delegate."""
from
Python
.
Test
import
ObjectDelegate
def
create_object
():
return
DelegateTest
()
d
=
ObjectDelegate
(
create_object
)
ob
=
DelegateTest
()
ob
.
CallObjectDelegate
(
d
)
def
test_invalid_object_delegate
():
"""Test invalid object delegate with mismatched return type."""
from
Python
.
Test
import
ObjectDelegate
d
=
ObjectDelegate
(
hello_func
)
ob
=
DelegateTest
()
with
pytest
.
raises
(
TypeError
):
ob
.
CallObjectDelegate
(
d
)
# test async delegates
# test multicast delegates
# test explicit op_
# test sig mismatch, both on managed and Python side
# test return wrong type
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