Fix XML coverage reporting (#42)

* Fix XML coverage reporting

* Bump Python version to code style validation

* Don't use stable for black per psf/black#420

* Migrated pre-commit config

.pre-commit-config.yaml

@@ -1,5 +1,6 @@
 # Styles the code properly
 # List of super useful formatters.
+repos:
 - repo: https://github.com/pre-commit/pre-commit-hooks
   rev: v2.2.3
   hooks:
@@ -22,7 +23,7 @@
   - id: trailing-whitespace
 # Leave black at the bottom so all touchups are done before it is run.
 - repo: https://github.com/ambv/black
-  rev: stable
+  rev: 23.7.0
   hooks:
   - id: black
     language_version: python3

internal/code-style-validation.yml

@@ -25,8 +25,8 @@ jobs:
   # Use Python 3 for validating the code.
   - task: UsePythonVersion@0
     inputs:
-      versionSpec: '3.7'
-    displayName: Use Python 3.7
+      versionSpec: '3.9'
+    displayName: Use Python 3.9
 
   - template: pip-install-packages.yml
     parameters:

internal/run-tests-with.yml

@@ -123,7 +123,7 @@ jobs:
   # as "coverage combine" will combine all coverage files that match .coverage.*.
   - bash: |
       (test -e .coveragerc && echo ".coveragerc was found." ) || ((python -c "print('[run]\nsource=.\nomit=\n    tests/*\n[report]\n\nexclude_lines =\n    raise NotImplementedError')" > .coveragerc) && echo "Generated .coveragerc")
-      PYTHONPATH=../ui_automation COVERAGE_FILE=.coverage.tests python -m pytest tests --cov -vv
+      PYTHONPATH=../ui_automation COVERAGE_FILE=.coverage.tests python -m pytest tests --cov --cov-report xml -vv
     # These environment variables need to be set so Linux runs can connect
     # to xvfb and to have complete logging. Each test logging output will
     # be captured by pytest and displayed on failure.