Python.NET/tests/test_delegate.py at master · ngogiaphat/Python.NET · 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 False

d = BoolDelegate(always_so_negative)

ob = DelegateTest()

ob.CallBoolDelegate(d)

assert not d()

assert not ob.CallBoolDelegate(d)

def always_so_positive():

return 1

bad = BoolDelegate(always_so_positive)

with pytest.raises(TypeError):

ob.CallBoolDelegate(bad)

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)

def test_out_int_delegate():

"""Test delegate with an out int parameter."""

from Python.Test import OutIntDelegate

value = 7

def out_hello_func(ignored):

return 5

d = OutIntDelegate(out_hello_func)

result = d(value)

assert result == 5

ob = DelegateTest()

result = ob.CallOutIntDelegate(d, value)

assert result == 5

def invalid_handler(ignored):

return '5'

d = OutIntDelegate(invalid_handler)

with pytest.raises(TypeError):

result = d(value)

def test_out_string_delegate():

"""Test delegate with an out string parameter."""

from Python.Test import OutStringDelegate

value = 'goodbye'

def out_hello_func(ignored):

return 'hello'

d = OutStringDelegate(out_hello_func)

result = d(value)

assert result == 'hello'

ob = DelegateTest()

result = ob.CallOutStringDelegate(d, value)

assert result == 'hello'

def test_ref_int_delegate():

"""Test delegate with a ref string parameter."""

from Python.Test import RefIntDelegate

value = 7

def ref_hello_func(data):

assert data == value

return data + 1

d = RefIntDelegate(ref_hello_func)

result = d(value)

assert result == value + 1

ob = DelegateTest()

result = ob.CallRefIntDelegate(d, value)

assert result == value + 1

def test_ref_string_delegate():

"""Test delegate with a ref string parameter."""

from Python.Test import RefStringDelegate

value = 'goodbye'

def ref_hello_func(data):

assert data == value

return 'hello'

d = RefStringDelegate(ref_hello_func)

result = d(value)

assert result == 'hello'

ob = DelegateTest()

result = ob.CallRefStringDelegate(d, value)

assert result == 'hello'

def test_ref_int_ref_string_delegate():

"""Test delegate with a ref int and ref string parameter."""

from Python.Test import RefIntRefStringDelegate

intData = 7

stringData = 'goodbye'

def ref_hello_func(intValue, stringValue):

assert intData == intValue

assert stringData == stringValue

return (intValue + 1, stringValue + '!')

d = RefIntRefStringDelegate(ref_hello_func)

result = d(intData, stringData)

assert result == (intData + 1, stringData + '!')

ob = DelegateTest()

result = ob.CallRefIntRefStringDelegate(d, intData, stringData)

assert result == (intData + 1, stringData + '!')

def not_a_tuple(intValue, stringValue):

return 'a'

d = RefIntRefStringDelegate(not_a_tuple)

with pytest.raises(TypeError):

result = d(intData, stringData)

def short_tuple(intValue, stringValue):

return (5,)

d = RefIntRefStringDelegate(short_tuple)

with pytest.raises(TypeError):

result = d(intData, stringData)

def long_tuple(intValue, stringValue):

return (5, 'a', 'b')

d = RefIntRefStringDelegate(long_tuple)

with pytest.raises(TypeError):

result = d(intData, stringData)

def wrong_tuple_item(intValue, stringValue):

return ('a', 'b')

d = RefIntRefStringDelegate(wrong_tuple_item)

with pytest.raises(TypeError):

result = d(intData, stringData)

def test_int_ref_int_ref_string_delegate():

"""Test delegate with a ref int and ref string parameter."""

from Python.Test import IntRefIntRefStringDelegate

intData = 7

stringData = 'goodbye'

def ref_hello_func(intValue, stringValue):

assert intData == intValue

assert stringData == stringValue

return (intValue + len(stringValue), intValue + 1, stringValue + '!')

d = IntRefIntRefStringDelegate(ref_hello_func)

result = d(intData, stringData)

assert result == (intData + len(stringData), intData + 1, stringData + '!')

ob = DelegateTest()

result = ob.CallIntRefIntRefStringDelegate(d, intData, stringData)

assert result == (intData + len(stringData), intData + 1, stringData + '!')

def not_a_tuple(intValue, stringValue):

return 'a'

d = IntRefIntRefStringDelegate(not_a_tuple)

with pytest.raises(TypeError):

result = d(intData, stringData)

def short_tuple(intValue, stringValue):

return (5,)

d = IntRefIntRefStringDelegate(short_tuple)

with pytest.raises(TypeError):

result = d(intData, stringData)

def wrong_return_type(intValue, stringValue):

return ('a', 7, 'b')

d = IntRefIntRefStringDelegate(wrong_return_type)

with pytest.raises(TypeError):

result = d(intData, stringData)

# test async delegates

# test multicast delegates

# test explicit op_

# test sig mismatch, both on managed and Python side

# test return wrong type

Python.NET/tests/test_delegate.py at master · ngogiaphat/Python.NET · GitHub

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