test_declarations.py 文件源码

def test_simple(self):
        import warnings
        from zope.interface.declarations import implementsOnly
        from zope.interface._compat import PYTHON3
        from zope.interface.interface import InterfaceClass
        IFoo = InterfaceClass("IFoo")
        globs = {'implementsOnly': implementsOnly,
                 'IFoo': IFoo,
                }
        locs = {}
        CODE = "\n".join([
            'class Foo(object):'
            '    implementsOnly(IFoo)',
            ])
        with warnings.catch_warnings(record=True) as log:
            warnings.resetwarnings()
            try:
                exec(CODE, globs, locs)
            except TypeError:
                if not PYTHON3:
                    raise
            else:
                if PYTHON3:
                    self.fail("Didn't raise TypeError")
                Foo = locs['Foo']
                spec = Foo.__implemented__
                self.assertEqual(list(spec), [IFoo])
                self.assertEqual(len(log), 0) # no longer warn