chore: Add Celery 5 to CI (#839)

Co-authored-by: sentry-bot <markus+ghbot@sentry.io>

tests/integrations/celery/test_celery.py

@@ -51,10 +51,19 @@ def inner(propagate_traces=True, backend="always_eager", **kwargs):
             request.addfinalizer(lambda: Hub.main.bind_client(None))
 
             # Once we drop celery 3 we can use the celery_worker fixture
-            w = worker.worker(app=celery)
-            t = threading.Thread(target=w.run)
-            t.daemon = True
-            t.start()
+            if VERSION < (5,):
+                worker_fn = worker.worker(app=celery).run
+            else:
+                from celery.bin.base import CLIContext
+
+                worker_fn = lambda: worker.worker(
+                    obj=CLIContext(app=celery, no_color=True, workdir=".", quiet=False),
+                    args=[],
+                )
+
+            worker_thread = threading.Thread(target=worker_fn)
+            worker_thread.daemon = True
+            worker_thread.start()
         else:
             raise ValueError(backend)
 

tox.ini

@@ -38,9 +38,10 @@ envlist =
     {py3.6,py3.7}-sanic-19
 
     # TODO: Add py3.9
+    {pypy,py2.7}-celery-3
     {pypy,py2.7,py3.5,py3.6}-celery-{4.1,4.2}
     {pypy,py2.7,py3.5,py3.6,py3.7,py3.8}-celery-{4.3,4.4}
-    {pypy,py2.7}-celery-3
+    {py3.6,py3.7,py3.8}-celery-5.0
 
     {py2.7,py3.7}-beam-{2.12,2.13}
 
@@ -138,6 +139,7 @@ deps =
     celery-4.3: vine<5.0.0
     # https://github.com/celery/celery/issues/6153
     celery-4.4: Celery>=4.4,<4.5,!=4.4.4
+    celery-5.0: Celery>=5.0,<5.1
 
     requests: requests>=2.0