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import asyncio
import json
import time
import pytest
from channels.generic.http import AsyncHttpConsumer
from channels.testing import HttpCommunicator
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_async_http_consumer():
"""
Tests that AsyncHttpConsumer is implemented correctly.
"""
class TestConsumer(AsyncHttpConsumer):
async def handle(self, body):
data = json.loads(body.decode("utf-8"))
await self.send_response(
200,
json.dumps({"value": data["value"]}).encode("utf-8"),
headers={b"Content-Type": b"application/json"},
)
app = TestConsumer()
# Open a connection
communicator = HttpCommunicator(
app,
method="POST",
path="/test/",
body=json.dumps({"value": 42, "anything": False}).encode("utf-8"),
)
response = await communicator.get_response()
assert response["body"] == b'{"value": 42}'
assert response["status"] == 200
assert response["headers"] == [(b"Content-Type", b"application/json")]
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_error():
class TestConsumer(AsyncHttpConsumer):
async def handle(self, body):
raise AssertionError("Error correctly raised")
communicator = HttpCommunicator(TestConsumer(), "GET", "/")
with pytest.raises(AssertionError) as excinfo:
await communicator.get_response(timeout=0.05)
assert str(excinfo.value) == "Error correctly raised"
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_per_scope_consumers():
"""
Tests that a distinct consumer is used per scope, with AsyncHttpConsumer as
the example consumer class.
"""
class TestConsumer(AsyncHttpConsumer):
def __init__(self):
super().__init__()
self.time = time.time()
async def handle(self, body):
body = f"{self.__class__.__name__} {id(self)} {self.time}"
await self.send_response(
200,
body.encode("utf-8"),
headers={b"Content-Type": b"text/plain"},
)
app = TestConsumer.as_asgi()
# Open a connection
communicator = HttpCommunicator(app, method="GET", path="/test/")
response = await communicator.get_response()
assert response["status"] == 200
# And another one.
communicator = HttpCommunicator(app, method="GET", path="/test2/")
second_response = await communicator.get_response()
assert second_response["status"] == 200
assert response["body"] != second_response["body"]
@pytest.mark.django_db(transaction=True)
@pytest.mark.asyncio
async def test_async_http_consumer_future():
"""
Regression test for channels accepting only coroutines. The ASGI specification
states that the `receive` and `send` arguments to an ASGI application should be
"awaitable callable" objects. That includes non-coroutine functions that return
Futures.
"""
class TestConsumer(AsyncHttpConsumer):
async def handle(self, body):
await self.send_response(
200,
b"42",
headers={b"Content-Type": b"text/plain"},
)
app = TestConsumer()
# Ensure the passed functions are specifically coroutines.
async def coroutine_app(scope, receive, send):
async def receive_coroutine():
return await asyncio.ensure_future(receive())
async def send_coroutine(*args, **kwargs):
return await asyncio.ensure_future(send(*args, **kwargs))
await app(scope, receive_coroutine, send_coroutine)
communicator = HttpCommunicator(coroutine_app, method="GET", path="/")
response = await communicator.get_response()
assert response["body"] == b"42"
assert response["status"] == 200
assert response["headers"] == [(b"Content-Type", b"text/plain")]
# Ensure the passed functions are "Awaitable Callables" and NOT coroutines.
async def awaitable_callable_app(scope, receive, send):
def receive_awaitable_callable():
return asyncio.ensure_future(receive())
def send_awaitable_callable(*args, **kwargs):
return asyncio.ensure_future(send(*args, **kwargs))
await app(scope, receive_awaitable_callable, send_awaitable_callable)
# Open a connection
communicator = HttpCommunicator(awaitable_callable_app, method="GET", path="/")
response = await communicator.get_response()
assert response["body"] == b"42"
assert response["status"] == 200
assert response["headers"] == [(b"Content-Type", b"text/plain")]
|
