Bug 1749064 - Add WebExtensions Python Subsuite to TC config. r=taskgraph-reviewers,robwu,jmaher

Depends on D135549

Differential Revision: https://phabricator.services.mozilla.com/D141725

taskcluster/ci/source-test/python.yml

@@ -537,6 +537,24 @@ telemetry-python:
         files-changed:
             - 'toolkit/components/telemetry/**'
 
+webext:
+    description: WebExtensions python utilities unit tests
+    platform:
+        - linux1804-64/opt
+    python-version: [3]
+    treeherder:
+        symbol: webext-py
+        tier: 2
+    run:
+        using: python-test
+        subsuite: webext-python
+    when:
+        files-changed:
+            - 'toolkit/components/extensions/webidl-api/**'
+            - 'toolkit/components/extensions/schemas/*.json'
+            - 'browser/components/extensions/schemas/*.json'
+            - 'mobile/android/components/extensions/schemas/*.json'
+
 xpcom:
     description: xpcom unit tests
     platform:

toolkit/components/extensions/webidl-api/moz.build

@@ -61,5 +61,6 @@ FINAL_LIBRARY = "xul"
 
 REQUIRES_UNIFIED_BUILD = True
 
-
+# Must be defined unconditionally (TC tasks doesn't account for build
+# configs and these tests do not depend on the bindings to be enabled).
 PYTHON_UNITTEST_MANIFESTS += ["test/python.ini"]

toolkit/components/extensions/webidl-api/test/python.ini

@@ -1,2 +1,5 @@
+[DEFAULT]
+subsuite = webext-python
+
 [test_all_schemas_smoketest.py]
 [test_json_schema_parsing.py]