def test_render(self):
        """
        L{ResourceScriptDirectory.getChild} returns a resource which renders a
        response with the HTTP 200 status code and the content of the rpy's
        C{request} global.
        """
        tmp = FilePath(self.mktemp())
        tmp.makedirs()
        tmp.child("test.rpy").setContent(b"""
from twisted.web.resource import Resource
class TestResource(Resource):
    isLeaf = True
    def render_GET(self, request):
        return b'ok'
resource = TestResource()""")
        resource = ResourceScriptDirectory(tmp._asBytesPath())
        request = DummyRequest([b''])
        child = resource.getChild(b"test.rpy", request)
        d = _render(child, request)
        def cbRendered(ignored):
            self.assertEqual(b"".join(request.written), b"ok")
        d.addCallback(cbRendered)
        return d

        L{ResourceScriptDirectory.getChild} returns a resource which renders a
        response with the HTTP 200 status code and the content of the rpy's
        C{request} global.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/web/test/test_script.py