test_core_context.py 文件源码

def test_exiting_a_not_entered_context_is_an_error(self):
        ctx = Context()
        with pytest.raises(ValueError) as excinfo:
            ctx.exit(key='no such key', value='some value')
        assert str(excinfo.value) == \
            'cannot exit not entered context - key {!r} mismatch'.format(
                'no such key')

        ctx.enter(key='key', value='enter value')
        with pytest.raises(ValueError) as excinfo:
            ctx.exit(key='key', value='exit value')
        assert str(excinfo.value) == \
            'cannot exit not entered context - value mismatch ' \
            '(exit: {!r}, enter: {!r})'.format(
                'exit value', 'enter value')