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from __future__ import print_function
import operator
import unittest
import wrapt
class TestDecorator(unittest.TestCase):
def test_no_parameters(self):
_args = (1, 2)
_kwargs = {'one': 1, 'two': 2}
@wrapt.decorator
def _decorator(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@_decorator
def _function(*args, **kwargs):
return args, kwargs
result = _function(*_args, **_kwargs)
self.assertEqual(result, (_args, _kwargs))
def test_instance_method_as_decorator(self):
_args = (1, 2)
_kwargs = {'one': 1, 'two': 2}
class Instance(object):
def __init__(self):
self.count = 0
@wrapt.decorator
def decorator(self, wrapped, instance, args, kwargs):
self.count += 1
return wrapped(*args, **kwargs)
instance = Instance()
@instance.decorator
def _function(*args, **kwargs):
return args, kwargs
result = _function(*_args, **_kwargs)
self.assertEqual(result, (_args, _kwargs))
self.assertEqual(instance.count, 1)
result = _function(*_args, **_kwargs)
self.assertEqual(result, (_args, _kwargs))
self.assertEqual(instance.count, 2)
def test_class_method_as_decorator(self):
_args = (1, 2)
_kwargs = {'one': 1, 'two': 2}
class Instance(object):
count = 0
@wrapt.decorator
@classmethod
def decorator(cls, wrapped, instance, args, kwargs):
cls.count += 1
return wrapped(*args, **kwargs)
@Instance.decorator
def _function(*args, **kwargs):
return args, kwargs
result = _function(*_args, **_kwargs)
self.assertEqual(result, (_args, _kwargs))
self.assertEqual(Instance.count, 1)
result = _function(*_args, **_kwargs)
self.assertEqual(result, (_args, _kwargs))
self.assertEqual(Instance.count, 2)
def test_class_type_as_decorator(self):
_args = (1, 2)
_kwargs = {'one': 1, 'two': 2}
@wrapt.decorator
class ClassDecorator(object):
def __call__(self, wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@ClassDecorator
def _function(*args, **kwargs):
return args, kwargs
result = _function(*_args, **_kwargs)
self.assertEqual(result, (_args, _kwargs))
def test_class_type_as_decorator_args(self):
_args = (1, 2)
_kwargs = {'one': 1, 'two': 2}
@wrapt.decorator
class ClassDecorator(object):
def __init__(self, arg):
assert arg == 1
def __call__(self, wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@ClassDecorator(arg=1)
def _function(*args, **kwargs):
return args, kwargs
result = _function(*_args, **_kwargs)
self.assertEqual(result, (_args, _kwargs))
def test_decorated_function_as_class_attribute(self):
@wrapt.decorator
def passthrough(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@passthrough
def function(self):
pass
class A:
_function = function
self.assertTrue(A._function._self_parent is function)
self.assertEqual(A._function._self_binding, "function")
self.assertEqual(A._function._self_owner, A)
a = A()
A._function(a)
self.assertTrue(a._function._self_parent is function)
self.assertEqual(a._function._self_binding, "function")
self.assertEqual(a._function._self_owner, A)
a._function()
# Test example without using the decorator to show same outcome.
def xfunction(self):
pass
class B:
_xfunction = xfunction
b = B()
B._xfunction(b)
b._xfunction()
def test_decorated_function_as_instance_attribute(self):
@wrapt.decorator
def passthrough(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@passthrough
def function(self):
pass
class A:
def __init__(self):
self._function = function
a = A()
self.assertTrue(a._function._self_parent is None)
self.assertEqual(a._function._self_binding, "function")
self.assertTrue(a._function._self_owner is None)
a._function(a)
bound_a = a._function.__get__(a, A)
self.assertTrue(bound_a._self_parent is function)
self.assertEqual(bound_a._self_binding, "function")
self.assertTrue(bound_a._self_owner is A)
bound_a()
# Test example without using the decorator to show same outcome.
def xfunction(self):
pass
class B:
def __init__(self):
self._xfunction = xfunction
b = B()
b._xfunction(b)
def test_decorated_builtin_as_class_attribute(self):
@wrapt.decorator
def passthrough(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
function = passthrough(operator.add)
class A:
_function = function
self.assertTrue(A._function._self_parent is None)
self.assertEqual(A._function._self_binding, "builtin")
self.assertTrue(A._function._self_owner is None)
A._function(1, 2)
a = A()
self.assertTrue(a._function._self_parent is None)
self.assertEqual(a._function._self_binding, "builtin")
self.assertTrue(a._function._self_owner is None)
a._function(1, 2)
# Test example without using the decorator to show same outcome.
class B:
_xfunction = operator.add
B._xfunction(1, 2)
b = B()
b._xfunction(1, 2)
def test_call_semantics_for_assorted_decorator_use_cases(self):
def g1():
pass
def g2(self):
pass
class C1:
def __init__(self):
self.f3 = g1
def f1(self):
print("SELF", self)
f2 = g2
c1 = C1()
c1.f2()
c1.f3()
class C2:
f2 = C1.f1
f3 = C1.f2
c2 = C2()
c2.f2()
c2.f3()
class C3:
f2 = c1.f1
c3 = C3()
c3.f2()
@wrapt.decorator
def passthrough(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
class C11:
@passthrough
def f1(self):
print("SELF", self)
c11 = C11()
class C12:
f2 = C11.f1
c12 = C12()
c12.f2()
class C13:
f2 = c11.f1
c13 = C13()
c13.f2()
C11.f1(c11)
C12.f2(c12)
def test_call_semantics_for_assorted_wrapped_descriptor_use_cases(self):
class A:
def __call__(self):
print("A:__call__")
a = A()
class B:
def __call__(self):
print("B:__call__")
def __get__(self, obj, type):
print("B:__get__")
return self
b = B()
class C:
f1 = a
f2 = b
c = C()
c.f1()
c.f2()
@wrapt.decorator
def wrapper(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
class D:
f1 = wrapper(a)
f2 = wrapper(b)
d = D()
d.f1()
d.f2()
if __name__ == '__main__':
unittest.main()
|
