Method test_delegating_throw

Lib/test/test_yield_from.py:301–339

Test delegating 'throw'

(self)

        ])

    def test_delegating_throw(self):
        """
        Test delegating 'throw'
        """
        trace = []
        def g1():
            try:
                trace.append("Starting g1")
                yield "g1 ham"
                yield from g2()
                yield "g1 eggs"
            finally:
                trace.append("Finishing g1")
        def g2():
            try:
                trace.append("Starting g2")
                yield "g2 spam"
                yield "g2 more spam"
            finally:
                trace.append("Finishing g2")
        try:
            g = g1()
            for i in range(2):
                x = next(g)
                trace.append("Yielded %s" % (x,))
            e = ValueError("tomato ejected")
            g.throw(e)
        except ValueError as e:
            self.assertEqual(e.args[0], "tomato ejected")
        else:
            self.fail("subgenerator failed to raise ValueError")
        self.assertEqual(trace,[
            "Starting g1",
            "Yielded g1 ham",
            "Starting g2",
            "Yielded g2 spam",
            "Finishing g2",
            "Finishing g1",
        ])

    def test_value_attribute_of_StopIteration_exception(self):
        """