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