Run tests against Python 3.9

[michael-k]

The tests are currently failing. I couldn't figure out why, but I haven't spent much time looking into it.

If someone else wants to address this, go for it. Otherwise I'll free some time before Python 3.9.0 is released and try to fix this.

---

Python 3.9.0 final is expected on Monday, 2020-10-05, see https://www.python.org/dev/peps/pep-0596/#schedule

[codecov-commenter]

Codecov Report

Merging #1270 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1270   +/-   ##
=======================================
  Coverage   99.44%   99.44%           
=======================================
  Files          15       15           
  Lines        1253     1253           
=======================================
  Hits         1246     1246           
  Misses          7        7           

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[carltongibson]

Hey @michael-k. Whilst we're here, can we adjust the workflow to not cancel the other jobs in the matrix on the first failure (since "still passes on 3.8" is useful info)?

[carltongibson]

@michael-k This diff seems to do the job:

diff --git a/tests/utils.py b/tests/utils.py
index e11410e..3a4bd25 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -3,13 +3,19 @@ from unittest import mock
 from django.db import models
 
 
+class QuerySet(models.QuerySet):
+
+    def __bool__(self):
+        return True
+
+
 class MockQuerySet:
     """
     Generate a mock that is suitably similar to a QuerySet
     """
 
     def __new__(self):
-        m = mock.Mock(spec_set=models.QuerySet())
+        m = mock.Mock(spec_set=QuerySet())
         m.filter.return_value = m
         m.all.return_value = m
         return m

[michael-k]

This diff seems to do the job:

\o/

The tests are green now :)

[carltongibson]

Super. Let's have it. Thanks!