CODEWITHSUNDEEP
pythondjangounit-testingdjango-channels
cjds
cjds

Reputation: 8426

Django Channels doesn't run basic test case

I'm trying to test my consumers with the testing framework from django channels, but even a basic test doesn't seem to work

This is what my test case looks like:

from channels import Channel
from channels.test import ChannelTestCase, HttpClient, apply_routes
from rci.consumers import Demultiplexer
from rosbridge.consumers import OtherWebSocketConsumer

class ChannelTestCase(ChannelTestCase):

    def test_channel(self):
        client = HttpClient()
        client.send_and_consume('websocket.connect', '/new/') # <--- here's the error
        self.assertIsNone(client.receive())

This is my routing:

http_routing = [
    route("http.request", admin.site.urls, path=r"^/admin/", method=r"^$"),
    #...and so on
]

channel_routing = [Demultiplexer.as_route(path=r"^/sock/")]

This is my consumer:

class Demultiplexer(WebsocketDemultiplexer):
    channel_session_user = True

   consumers = {
       "rosbridge": ROSWebSocketConsumer,
       "setting": SettingsConsumer,
 }

This gives me the following error:

ERROR: test_ros_channel (robot_configuration_interface.tests.unit.test_channels.ROSChannelTestCase) ---------------------------------------------------------------------- Traceback (most recent call last): File "/home/cjds/development/robot_configuration_interface/robot_configuration_interface/tests/unit/test_channels.py", line 36, in test_ros_channel client.send_and_consume('websocket.connect', '/new/') File "/usr/local/lib/python2.7/dist-packages/channels/test/http.py", line 94, in send_and_consume self.send(channel, content, text, path) File "/usr/local/lib/python2.7/dist-packages/channels/test/http.py", line 79, in send content.setdefault('reply_channel', self.reply_channel) AttributeError: 'str' object has no attribute 'setdefault'

I'm trying to follow this tutorial here:

http://channels.readthedocs.io/en/stable/testing.html#clients

Upvotes: 1

Views: 865

Answers (1)

Risadinha
Risadinha

Reputation: 16666

channels 1.x

You are calling send_and_consume with two positional arguments which results in effect in this call (which is exactly why there happens an error during execution in this line):

# AGAIN this is wrong code this is what is written in the question
# only difference is the naming of the (previously positional) arguments
client.send_and_consume(channel='websocket.connect', content='/new/')

and here is the explanation why there is an error:

However, the implementation of send_and_consume expects content to be a dictionary:

def send_and_consume(self, channel, content={}, text=None, path='/', fail_on_none=True, check_accept=True):
        """
        Reproduce full life cycle of the message
        """
        self.send(channel, content, text, path)
        return self.consume(channel, fail_on_none=fail_on_none, check_accept=check_accept)

Implementation code taken from: https://github.com/django/channels/blob/master/channels/test/http.py#L92

channels 2.x

See https://channels.readthedocs.io/en/latest/topics/testing.html, as mentioned in the comment by Paul Whipp.

Upvotes: 3

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