56 lines
1.8 KiB
Text
56 lines
1.8 KiB
Text
# Copyright (c) Twisted Matrix Laboratories.
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# See LICENSE for details.
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import inspect
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from twisted.python.deprecate import _passedSignature
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from twisted.trial.unittest import SynchronousTestCase
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class KeywordOnlyTests(SynchronousTestCase):
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"""
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Keyword only arguments (PEP 3102).
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"""
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def checkPassed(self, func, *args, **kw):
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"""
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Test an invocation of L{passed} with the given function, arguments, and
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keyword arguments.
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@param func: A function whose argspec to pass to L{_passed}.
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@type func: A callable.
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@param args: The arguments which could be passed to L{func}.
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@param kw: The keyword arguments which could be passed to L{func}.
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@return: L{_passed}'s return value
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@rtype: L{dict}
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"""
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return _passedSignature(inspect.signature(func), args, kw)
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def test_passedKeywordOnly(self):
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"""
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Keyword only arguments follow varargs.
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They are specified in PEP 3102.
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"""
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def func1(*a, b=True):
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"""
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b is a keyword-only argument, with a default value.
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"""
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def func2(*a, b=True, c, d, e):
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"""
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b, c, d, e are keyword-only arguments.
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b has a default value.
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"""
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self.assertEqual(self.checkPassed(func1, 1, 2, 3),
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dict(a=(1, 2, 3), b=True))
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self.assertEqual(self.checkPassed(func1, 1, 2, 3, b=False),
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dict(a=(1, 2, 3), b=False))
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self.assertEqual(self.checkPassed(func2,
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1, 2, b=False, c=1, d=2, e=3),
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dict(a=(1, 2), b=False, c=1, d=2, e=3))
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self.assertRaises(TypeError, self.checkPassed,
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func2, 1, 2, b=False, c=1, d=2)
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