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import asyncio
import sys
from unittest import skipIf
from asgiref.sync import async_to_sync
from asgiref.testing import ApplicationCommunicator
from django.core.asgi import get_asgi_application
from django.core.signals import request_started
from django.db import close_old_connections
from django.test import SimpleTestCase, override_settings
from .urls import test_filename
@skipIf(sys.platform == 'win32' and (3, 8, 0) < sys.version_info < (3, 8, 1), 'https://bugs.python.org/issue38563')
@override_settings(ROOT_URLCONF='asgi.urls')
class ASGITest(SimpleTestCase):
def setUp(self):
request_started.disconnect(close_old_connections)
def _get_scope(self, **kwargs):
return {
'type': 'http',
'asgi': {'version': '3.0', 'spec_version': '2.1'},
'http_version': '1.1',
'method': 'GET',
'query_string': b'',
'server': ('testserver', 80),
**kwargs,
}
def tearDown(self):
request_started.connect(close_old_connections)
@async_to_sync
async def test_get_asgi_application(self):
"""
get_asgi_application() returns a functioning ASGI callable.
"""
application = get_asgi_application()
# Construct HTTP request.
communicator = ApplicationCommunicator(application, self._get_scope(path='/'))
await communicator.send_input({'type': 'http.request'})
# Read the response.
response_start = await communicator.receive_output()
self.assertEqual(response_start['type'], 'http.response.start')
self.assertEqual(response_start['status'], 200)
self.assertEqual(
set(response_start['headers']),
{
(b'Content-Length', b'12'),
(b'Content-Type', b'text/html; charset=utf-8'),
},
)
response_body = await communicator.receive_output()
self.assertEqual(response_body['type'], 'http.response.body')
self.assertEqual(response_body['body'], b'Hello World!')
@async_to_sync
async def test_file_response(self):
"""
Makes sure that FileResponse works over ASGI.
"""
application = get_asgi_application()
# Construct HTTP request.
communicator = ApplicationCommunicator(application, self._get_scope(path='/file/'))
await communicator.send_input({'type': 'http.request'})
# Get the file content.
with open(test_filename, 'rb') as test_file:
test_file_contents = test_file.read()
# Read the response.
response_start = await communicator.receive_output()
self.assertEqual(response_start['type'], 'http.response.start')
self.assertEqual(response_start['status'], 200)
self.assertEqual(
set(response_start['headers']),
{
(b'Content-Length', str(len(test_file_contents)).encode('ascii')),
(b'Content-Type', b'text/plain' if sys.platform.startswith('win') else b'text/x-python'),
(b'Content-Disposition', b'inline; filename="urls.py"'),
},
)
response_body = await communicator.receive_output()
self.assertEqual(response_body['type'], 'http.response.body')
self.assertEqual(response_body['body'], test_file_contents)
@async_to_sync
async def test_headers(self):
application = get_asgi_application()
communicator = ApplicationCommunicator(
application,
self._get_scope(
path='/meta/',
headers=[
[b'content-type', b'text/plain; charset=utf-8'],
[b'content-length', b'77'],
[b'referer', b'Scotland'],
[b'referer', b'Wales'],
],
),
)
await communicator.send_input({'type': 'http.request'})
response_start = await communicator.receive_output()
self.assertEqual(response_start['type'], 'http.response.start')
self.assertEqual(response_start['status'], 200)
self.assertEqual(
set(response_start['headers']),
{
(b'Content-Length', b'19'),
(b'Content-Type', b'text/plain; charset=utf-8'),
},
)
response_body = await communicator.receive_output()
self.assertEqual(response_body['type'], 'http.response.body')
self.assertEqual(response_body['body'], b'From Scotland,Wales')
@async_to_sync
async def test_get_query_string(self):
application = get_asgi_application()
for query_string in (b'name=Andrew', 'name=Andrew'):
with self.subTest(query_string=query_string):
communicator = ApplicationCommunicator(
application,
self._get_scope(path='/', query_string=query_string),
)
await communicator.send_input({'type': 'http.request'})
response_start = await communicator.receive_output()
self.assertEqual(response_start['type'], 'http.response.start')
self.assertEqual(response_start['status'], 200)
response_body = await communicator.receive_output()
self.assertEqual(response_body['type'], 'http.response.body')
self.assertEqual(response_body['body'], b'Hello Andrew!')
@async_to_sync
async def test_disconnect(self):
application = get_asgi_application()
communicator = ApplicationCommunicator(application, self._get_scope(path='/'))
await communicator.send_input({'type': 'http.disconnect'})
with self.assertRaises(asyncio.TimeoutError):
await communicator.receive_output()
@async_to_sync
async def test_wrong_connection_type(self):
application = get_asgi_application()
communicator = ApplicationCommunicator(
application,
self._get_scope(path='/', type='other'),
)
await communicator.send_input({'type': 'http.request'})
msg = 'Django can only handle ASGI/HTTP connections, not other.'
with self.assertRaisesMessage(ValueError, msg):
await communicator.receive_output()
@async_to_sync
async def test_non_unicode_query_string(self):
application = get_asgi_application()
communicator = ApplicationCommunicator(
application,
self._get_scope(path='/', query_string=b'\xff'),
)
await communicator.send_input({'type': 'http.request'})
response_start = await communicator.receive_output()
self.assertEqual(response_start['type'], 'http.response.start')
self.assertEqual(response_start['status'], 400)
response_body = await communicator.receive_output()
self.assertEqual(response_body['type'], 'http.response.body')
self.assertEqual(response_body['body'], b'')
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