During tests: the on_startup signal is sent before the loop is set

[cecton]

Long story short

Between the version 2.1 and 2.2 we change the order of when the signal on_startup is sent during the tests and when we make the handlers. Because of that, all the on_startup hooks doesn't have a loop in app.loop.

ed28add

commit ed28add756e2a5dc8caf082641ac1d1810a18c7a
Author: Andrew Svetlov <andrew.svetlov@gmail.com>
Date:   Thu Jun 15 00:51:40 2017 +0300

    Fix #1947: don't raise DeprecationWarning inside on_startup() handler for test_utils

diff --git a/CHANGES.rst b/CHANGES.rst
index 82e545b9..d1640a92 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -18,7 +18,8 @@ Changes
 
 - Use CIMultiDict for ClientRequest.skip_auto_headers #1970
 
--
+- Fix wrong startup sequence: test server doesn't raise
+  `DeprecationWarning` now #1947
 
 -
 
diff --git a/aiohttp/test_utils.py b/aiohttp/test_utils.py
index 4791cde8..21f89362 100644
--- a/aiohttp/test_utils.py
+++ b/aiohttp/test_utils.py
@@ -148,8 +148,8 @@ class TestServer(BaseTestServer):
 
     @asyncio.coroutine
     def _make_factory(self, **kwargs):
-        self.handler = self.app.make_handler(loop=self._loop, **kwargs)
         yield from self.app.startup()
+        self.handler = self.app.make_handler(loop=self._loop, **kwargs)
         return self.handler
 
     @asyncio.coroutine

Expected behaviour

Keep the behavior consistent when running the app within or without a test.

Actual behaviour

app.loop is None during a test but it is an event loop when running with web.run_app.

Steps to reproduce

import aiohttp
from aiohttp import web
from aiohttp.test_utils import AioHTTPTestCase, unittest_run_loop
from distutils.version import StrictVersion


async def hook(app):
    assert StrictVersion(aiohttp.__version__) >= StrictVersion("2.2")
    assert app.loop is not None # fails in the test case but not in run_app


class TestCase(AioHTTPTestCase):
    async def get_application(self):
        app = web.Application()
        app.on_startup.append(hook)
        return app

    @unittest_run_loop
    async def test_on_startup_hook(self):
        pass # will fail before executing the test


if __name__ == '__main__':
    app = web.Application()
    app.on_startup.append(hook)
    web.run_app(app)

Your environment

ArchLinux, Python 3.6

[cecton]

Linked to #1947 and #1964

[cecton]

Fixed by #2068

[lock]

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