/tests/web/test_wsgi_gateway_generator.py

#!/usr/bin/env python

from .helpers import urlopen


def application(environ, start_response):
    status = "200 OK"
    response_headers = [("Content-type", "text/plain")]
    start_response(status, response_headers)

    def response():
        yield "Hello "
        yield "World!"

    return response()


def test(webapp):
    f = urlopen(webapp.server.http.base)
    s = f.read()
    assert s == b"Hello World!"