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from __future__ import print_function
import unittest
import inspect
import types
import wrapt
from compat import PY2, exec_, getfullargspec
DECORATORS_CODE = """
import wrapt
def prototype(arg1, arg2, arg3=None, *args, **kwargs): pass
@wrapt.decorator(adapter=prototype)
def adapter1(wrapped, instance, args, kwargs):
'''adapter documentation'''
return wrapped(*args, **kwargs)
"""
decorators = types.ModuleType('decorators')
exec_(DECORATORS_CODE, decorators.__dict__, decorators.__dict__)
def function1(arg1, arg2):
'''documentation'''
return arg1, arg2
function1o = function1
@decorators.adapter1
def function1(arg1, arg2):
'''documentation'''
return arg1, arg2
function1d = function1
class TestAdapterAttributes(unittest.TestCase):
def test_object_name(self):
# Test preservation of function __name__ attribute.
self.assertEqual(function1d.__name__, function1o.__name__)
def test_object_qualname(self):
# Test preservation of function __qualname__ attribute.
try:
__qualname__ = function1o.__qualname__
except AttributeError:
pass
else:
self.assertEqual(function1d.__qualname__, __qualname__)
def test_module_name(self):
# Test preservation of function __module__ attribute.
self.assertEqual(function1d.__module__, __name__)
def test_doc_string(self):
# Test preservation of function __doc__ attribute. It is
# still the documentation from the wrapped function, not
# of the adapter.
self.assertEqual(function1d.__doc__, 'documentation')
class TestArgumentSpecification(unittest.TestCase):
def test_argspec(self):
# Test preservation of function argument specification. It
# actually needs to match that of the adapter function the
# prototype of which was supplied via the dummy function.
def _adapter(arg1, arg2, arg3=None, *args, **kwargs): pass
function1a_argspec = getfullargspec(_adapter)
function1d_argspec = getfullargspec(function1d)
self.assertEqual(function1a_argspec, function1d_argspec)
# Now bind the function to an instance. The argspec should
# still match.
bound_function1d = function1d.__get__(object(), object)
bound_function1d_argspec = getfullargspec(bound_function1d)
self.assertEqual(function1a_argspec, bound_function1d_argspec)
def test_signature(self):
# Test preservation of function argument specification. It
# actually needs to match that of the adapter function the
# prototype of which was supplied via the dummy function.
if PY2:
return
def _adapter(arg1, arg2, arg3=None, *args, **kwargs): pass
function1a_signature = str(inspect.signature(_adapter))
function1d_signature = str(inspect.signature(function1d))
self.assertEqual(function1a_signature, function1d_signature)
def test_isinstance(self):
# Test preservation of isinstance() checks.
self.assertTrue(isinstance(function1d, type(function1o)))
class TestDynamicAdapter(unittest.TestCase):
def test_dynamic_adapter_function(self):
def _adapter(arg1, arg2, arg3=None, *args, **kwargs): pass
argspec = getfullargspec(_adapter)
@wrapt.decorator(adapter=argspec)
def _wrapper_1(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@_wrapper_1
def _function_1():
pass
self.assertEqual(getfullargspec(_function_1), argspec)
args = '(arg1, arg2, arg3=None, *args, **kwargs)'
@wrapt.decorator(adapter=args)
def _wrapper_2(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@_wrapper_2
def _function_2():
pass
self.assertEqual(getfullargspec(_function_2), argspec)
def test_dynamic_adapter_instancemethod(self):
def _adapter(self, arg1, arg2, arg3=None, *args, **kwargs): pass
argspec = getfullargspec(_adapter)
@wrapt.decorator(adapter=argspec)
def _wrapper_1(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
class Class1(object):
@_wrapper_1
def function(self):
pass
instance1 = Class1()
self.assertEqual(getfullargspec(Class1.function), argspec)
self.assertEqual(getfullargspec(instance1.function), argspec)
args = '(self, arg1, arg2, arg3=None, *args, **kwargs)'
@wrapt.decorator(adapter=args)
def _wrapper_2(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
class Class2(object):
@_wrapper_2
def function(self):
pass
instance2 = Class2()
self.assertEqual(getfullargspec(Class2.function), argspec)
self.assertEqual(getfullargspec(instance2.function), argspec)
def test_dynamic_adapter_classmethod(self):
def _adapter(cls, arg1, arg2, arg3=None, *args, **kwargs): pass
argspec = getfullargspec(_adapter)
@wrapt.decorator(adapter=argspec)
def _wrapper_1(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
class Class1(object):
@_wrapper_1
@classmethod
def function(cls):
pass
instance1 = Class1()
self.assertEqual(getfullargspec(Class1.function), argspec)
self.assertEqual(getfullargspec(instance1.function), argspec)
args = '(cls, arg1, arg2, arg3=None, *args, **kwargs)'
@wrapt.decorator(adapter=args)
def _wrapper_2(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
class Class2(object):
@_wrapper_2
@classmethod
def function(self):
pass
instance2 = Class2()
self.assertEqual(getfullargspec(Class2.function), argspec)
self.assertEqual(getfullargspec(instance2.function), argspec)
def test_adapter_factory(self):
def factory(wrapped):
argspec = getfullargspec(wrapped)
argspec.args.insert(0, 'arg0')
return argspec
@wrapt.decorator(adapter=wrapt.adapter_factory(factory))
def _wrapper_1(wrapped, instance, args, kwargs):
return wrapped(*args, **kwargs)
@_wrapper_1
def _function_1(arg1, arg2):
pass
argspec = getfullargspec(_function_1)
self.assertEqual(argspec.args, ['arg0', 'arg1', 'arg2'])
if __name__ == '__main__':
unittest.main()
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