Fix #677: Enable CI for python 3.10

Fix #689: test_django fails on py3.10

Re-enable Django tests on Python 3.10, and add it to CI runs.

azure-pipelines/pipelines.yaml

@@ -49,6 +49,8 @@ jobs:
                   python.version: "3.8"
               py39:
                   python.version: "3.9"
+              py310:
+                  python.version: "3.10"
 
       steps:
           - script: |
@@ -80,6 +82,8 @@ jobs:
                   python.version: "3.8"
               py39:
                   python.version: "3.9"
+              py310:
+                  python.version: "3.10"
 
       steps:
           - script: |
@@ -113,6 +117,8 @@ jobs:
                   python.version: "3.8"
               py39:
                   python.version: "3.9"
+              py310:
+                  python.version: "3.10"
               py27_32:
                   python.version: "2.7"
                   architecture: "x86"

tests/debugpy/test_django.py

@@ -12,10 +12,7 @@ from tests import code, debug, log, net, test_data
 from tests.debug import runners, targets
 from tests.patterns import some
 
-pytestmark = [
-    pytest.mark.timeout(60),
-    pytest.mark.skipif(sys.version_info >= (3, 10), reason="https://github.com/microsoft/debugpy/issues/689"),
-]
+pytestmark = pytest.mark.timeout(60)
 
 django_server = net.WebServer(net.get_test_server_port(8000, 8100))