Sanic.event() fires when any event in the group is dispatched

[talljosh]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When I wait for an event:

await app.event('myapp.something.arrived')

The event fires when another signal/event in the same event group is dispatched:

await app.dispatch('myapp.something.exploded')

This appears to be because of this section of signals.py, which calls set() on every event in the event group.

This is unexpected behaviour. If I wait for a particular event, I don't expect the future to return until that particular event is dispatched.

Code snippet

import asyncio
from sanic import Sanic
from sanic.response import text

app = Sanic('example')
app.config.EVENT_AUTOREGISTER = True


@app.get('/')
async def example(request):
    task = asyncio.create_task(app.event('foo.bar.baz'))

    await app.dispatch('foo.bar.spam')

    await asyncio.sleep(.5)
    assert not task.done()

    return text('ok')

Expected Behavior

I do not expect this code to raise an AssertionError, but it does.

How do you run Sanic?

Sanic CLI

Operating System

Linux

Sanic Version

23.3.0

Additional context

No response

[talljosh]

I'm working on a potential fix for this in https://github.com/talljosh/sanic. I've done a basic fix, but I'd like to update it to allow app.event() to take condition and exclusive args in the same way signal handlers can.