def test_render_none(self):
        renderer = XMLRenderer()
        content = renderer.render({'field': None}, 'application/xml')
        self.assertXMLContains(content, '<field></field>')
Loops until the Server exits, reloading, adding or removing Instances.
dataset/ETHPy150Open jpadilla/django-rest-framework-xml/tests/test_renderers.py/XMLRendererTestCase.test_render_none--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/devappserver2/server.py/AutoScalingServer._loop_adjusting_instances