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import asyncio
import pytest
from aiohttp import web
@asyncio.coroutine
def test_middleware_modifies_response(loop, test_client):
@asyncio.coroutine
def handler(request):
return web.Response(body=b'OK')
@asyncio.coroutine
def middleware_factory(app, handler):
@asyncio.coroutine
def middleware(request):
resp = yield from handler(request)
assert 200 == resp.status
resp.set_status(201)
resp.text = resp.text + '[MIDDLEWARE]'
return resp
return middleware
app = web.Application(loop=loop)
app.middlewares.append(middleware_factory)
app.router.add_route('GET', '/', handler)
client = yield from test_client(app)
resp = yield from client.get('/')
assert 201 == resp.status
txt = yield from resp.text()
assert 'OK[MIDDLEWARE]' == txt
@asyncio.coroutine
def test_middleware_handles_exception(loop, test_client):
@asyncio.coroutine
def handler(request):
raise RuntimeError('Error text')
@asyncio.coroutine
def middleware_factory(app, handler):
@asyncio.coroutine
def middleware(request):
with pytest.raises(RuntimeError) as ctx:
yield from handler(request)
return web.Response(status=501,
text=str(ctx.value) + '[MIDDLEWARE]')
return middleware
app = web.Application(loop=loop)
app.middlewares.append(middleware_factory)
app.router.add_route('GET', '/', handler)
client = yield from test_client(app)
resp = yield from client.get('/')
assert 501 == resp.status
txt = yield from resp.text()
assert 'Error text[MIDDLEWARE]' == txt
@asyncio.coroutine
def test_middleware_chain(loop, test_client):
@asyncio.coroutine
def handler(request):
return web.Response(text='OK')
def make_factory(num):
@asyncio.coroutine
def factory(app, handler):
def middleware(request):
resp = yield from handler(request)
resp.text = resp.text + '[{}]'.format(num)
return resp
return middleware
return factory
app = web.Application(loop=loop)
app.middlewares.append(make_factory(1))
app.middlewares.append(make_factory(2))
app.router.add_route('GET', '/', handler)
client = yield from test_client(app)
resp = yield from client.get('/')
assert 200 == resp.status
txt = yield from resp.text()
assert 'OK[2][1]' == txt
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