[issue15351] Add to unittest.TestCase support for using context managers

[Julian Berman]

Julian Berman added the comment:

Now that we have contextlib.ExitStack, I think we should consider that here.

I.e., I think ExitStack deserves a method that calls its __enter__ and __exit__, say .enter() and .exit(), and then the idiom for this wouldn't require anything on TestCase, it'd be:


class TestStuff(TestCase):
    def setUp(self):
        self.stack = ExitStack()

        self.stack.enter_context(my_context_manager())
        self.stack.enter_context(my_context_manager2())
        self.stack.enter_context(my_context_manager3())

        self.stack.enter()
        self.addCleanup(self.stack.exit)

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nosy: +Julian

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<http://bugs.python.org/issue15351>
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