Code coverage added (openedx#31630)

* fix: code coverage added

* fix: .coverage folder added

* fix: .coverage folder location changed

* fix: combine folder modified

* fix: combine command updated

* fix: .coverage folder rollback

* fix: path commented

* fix: upload path modified

* fix: path updated to root

* fix: .coveragerc added

* fix: new coverage folder added

* fix: combine path removed

* fix: coverage files path changed

* fix: data files path updated

* fix: .coverage added as path

* fix: coveragerc updated

* fix: env TEST_SUIT rollbacked

* fix: renaming coverage files step added

* fix: ls added for testing

* fix: debugging commands added

* fix: triggeering cov command in tox.in

* fix: cd coverage added

* fix: commands modified

* fix: triggering coverage using command

* fix: removed omitteed files

* fix: removed all omited files

* fix: skipped all omitted files

* fix: source updated to root in coveragern

* fix: coveragerc files rolledback

* fix: source changed to edx-platform

* fix: cms-2 shard name reemoved

* fix: rmeoved coveragee trigger

* fix: removed shard added back

* fix: --cov-config=setup.cfg added

* fix: combining cov paths format changed to comma

* fix: bash changeeed for coveerage

* fix: paths updateed for testing

* fix: coverage combine command fixed

* fix: final check applied

* fix: final coveragee step addeed and tested

* fix: actions version upgraded in unit tests

* fix: testing space separated commands

* fix: coverage data files path removeed from combine command

* fix: coverage combine reports/* addedd

* fix: updated --cov path

* fix: data_file path updated by removing TEST_SUIT variable

---------

Co-authored-by: Awais Qureshi <[email protected]>

.coveragerc

@@ -1,6 +1,7 @@
 # .coveragerc for edx-platform
 [run]
-data_file = reports/${TEST_SUITE}.coverage
+branch=true
+data_file = reports/.coverage
 source =
     cms
     common/djangoapps

.github/actions/unit-tests/action.yml

@@ -16,7 +16,7 @@ runs:
     - name: run tests
       shell: bash
       run: |
-        python -Wd -m pytest -p no:randomly --ds=${{ env.settings_path }} ${{ env.unit_test_paths }}
+        python -Wd -m pytest -p no:randomly --ds=${{ env.settings_path }} ${{ env.unit_test_paths }} --cov=.
 
     - name: rename warnings json file
       if: success()

.github/workflows/unit-tests.yml

@@ -42,7 +42,7 @@ jobs:
         run: sudo chown runner:runner -R .*
 
       - name: checkout repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
 
       # This gives Mongo several chances to start. We started getting flakiness
       # around 2022-02-15 wherein the start command would sometimes exit with:
@@ -74,6 +74,16 @@ jobs:
       - name: Setup and run tests
         uses: ./.github/actions/unit-tests
 
+      - name: Renaming coverage data file
+        run: |
+          mv reports/.coverage reports/${{ matrix.shard_name }}.coverage
+
+      - name: Upload coverage
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage
+          path: reports/${{matrix.shard_name}}.coverage
+
   # This job aggregates test results. It's the required check for branch protection.
   # https://github.com/marketplace/actions/alls-green#why
   # https://github.com/orgs/community/discussions/33579
@@ -96,7 +106,7 @@ jobs:
     steps:
       - name: sync directory owner
         run: sudo chown runner:runner -R .*
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: collect pytest warnings files
         uses: actions/download-artifact@v2
         with:
@@ -112,8 +122,41 @@ jobs:
 
       - name: save warning report
         if: success()
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: pytest-warning-report-html
           path: |
             reports/pytest_warnings/warning_report_all.html
+
+  # Combine and upload coverage reports.
+  coverage:
+    needs: run-tests
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: [ 3.8 ]
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v3
+
+      - name: Setup Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v4
+        with:
+          python-version: ${{ matrix.python-version }}
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v3
+        with:
+          name: coverage
+          path: reports
+
+      - name: Install Python dependencies
+        run: |
+          pip install -r requirements/edx/coverage.txt
+
+      - name: Run coverage
+        run: |
+          coverage combine reports/*
+          coverage report
+          coverage xml
+      - uses: codecov/codecov-action@v3