154 lines
4.4 KiB
Python
154 lines
4.4 KiB
Python
from __future__ import print_function
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import unittest
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import inspect
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import imp
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import wrapt
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from compat import PY2, PY3, exec_
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DECORATORS_CODE = """
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import wrapt
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def prototype(arg1, arg2, arg3=None, *args, **kwargs): pass
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@wrapt.decorator(adapter=prototype)
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def adapter1(wrapped, instance, args, kwargs):
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'''adapter documentation'''
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return wrapped(*args, **kwargs)
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"""
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decorators = imp.new_module('decorators')
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exec_(DECORATORS_CODE, decorators.__dict__, decorators.__dict__)
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def function1(arg1, arg2):
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'''documentation'''
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return arg1, arg2
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function1o = function1
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@decorators.adapter1
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def function1(arg1, arg2):
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'''documentation'''
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return arg1, arg2
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function1d = function1
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class TestAdapterAttributes(unittest.TestCase):
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def test_object_name(self):
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# Test preservation of function __name__ attribute.
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self.assertEqual(function1d.__name__, function1o.__name__)
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def test_object_qualname(self):
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# Test preservation of function __qualname__ attribute.
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try:
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__qualname__ = function1o.__qualname__
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except AttributeError:
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pass
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else:
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self.assertEqual(function1d.__qualname__, __qualname__)
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def test_module_name(self):
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# Test preservation of function __module__ attribute.
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self.assertEqual(function1d.__module__, __name__)
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def test_doc_string(self):
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# Test preservation of function __doc__ attribute. It is
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# still the documentation from the wrapped function, not
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# of the adapter.
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self.assertEqual(function1d.__doc__, 'documentation')
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class TestArgumentSpecification(unittest.TestCase):
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def test_argspec(self):
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# Test preservation of function argument specification. It
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# actually needs to match that of the adapter function the
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# prototype of which was supplied via the dummy function.
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def _adapter(arg1, arg2, arg3=None, *args, **kwargs): pass
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function1a_argspec = inspect.getargspec(_adapter)
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function1d_argspec = inspect.getargspec(function1d)
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self.assertEqual(function1a_argspec, function1d_argspec)
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# Now bind the function to an instance. The argspec should
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# still match.
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bound_function1d = function1d.__get__(object(), object)
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bound_function1d_argspec = inspect.getargspec(bound_function1d)
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self.assertEqual(function1a_argspec, bound_function1d_argspec)
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def test_signature(self):
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# Test preservation of function argument specification. It
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# actually needs to match that of the adapter function the
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# prototype of which was supplied via the dummy function.
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if PY2:
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return
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def _adapter(arg1, arg2, arg3=None, *args, **kwargs): pass
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function1a_signature = str(inspect.signature(_adapter))
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function1d_signature = str(inspect.signature(function1d))
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self.assertEqual(function1a_signature, function1d_signature)
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def test_isinstance(self):
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# Test preservation of isinstance() checks.
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self.assertTrue(isinstance(function1d, type(function1o)))
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class TestDynamicAdapter(unittest.TestCase):
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def test_dynamic_adapter(self):
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def _adapter(arg1, arg2, arg3=None, *args, **kwargs): pass
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argspec = inspect.getargspec(_adapter)
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@wrapt.decorator(adapter=argspec)
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def _wrapper_1(wrapped, instance, args, kwargs):
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return wrapped(*args, **kwargs)
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@_wrapper_1
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def _function_1():
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pass
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self.assertEqual(inspect.getargspec(_function_1), argspec)
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args = inspect.formatargspec(*argspec)
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@wrapt.decorator(adapter=args)
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def _wrapper_2(wrapped, instance, args, kwargs):
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return wrapped(*args, **kwargs)
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@_wrapper_2
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def _function_2():
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pass
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self.assertEqual(inspect.getargspec(_function_2), argspec)
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def test_adapter_factory(self):
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def factory(wrapped):
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argspec = inspect.getargspec(wrapped)
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argspec.args.insert(0, 'arg0')
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return argspec
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@wrapt.decorator(adapter=wrapt.adapter_factory(factory))
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def _wrapper_1(wrapped, instance, args, kwargs):
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return wrapped(*args, **kwargs)
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@_wrapper_1
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def _function_1(arg1, arg2):
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pass
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argspec = inspect.getargspec(_function_1)
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self.assertEqual(argspec.args, ['arg0', 'arg1', 'arg2'])
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if __name__ == '__main__':
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unittest.main()
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