chore(ci): move unit tests back to 16 (#299)

# Motivation

<!-- Why is this change necessary? -->

# Content

<!-- Please include a summary of the change -->

# Testing

<!-- How was the change tested? -->

# Please check the following before marking your PR as ready for review

- [ ] I have added tests for my changes
- [ ] I have updated the documentation or added new documentation as
needed

Author: christinewangcw

.github/workflows/unit-tests.yml

@@ -12,26 +12,23 @@ on:
 
 jobs:
   unit-tests:
-    # changing the following value will significantly affect github's cost. Be careful and consult with the team before changing it.
-    runs-on: ubuntu-latest-32
+    runs-on: ubuntu-latest-16
     steps:
       - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Setup backend
         uses: ./.github/actions/setup-backend
-      - name: Test with pytest
-        timeout-minutes: 6
-        run: |
-          uv run pytest --cov \
-            -o junit_suite_name="${{github.job}}" \
-            -n auto \
-            -vv \
-            --cov \
-            --cov-append \
-            --timeout 50 \
-            --cov-report=xml \
-            tests/unit
+      - name: Run ATS and Tests
+        uses: ./.github/actions/run_ats
+        timeout-minutes: 15
+        with:
+          default_tests: "tests/unit"
+          codecov_static_token: ${{ secrets.CODECOV_STATIC_TOKEN }}
+          codecov_token: ${{ secrets.CODECOV_TOKEN }}
+          collect_args: "--timeout 15"
+          codecov_flags: unit-tests
+
   codemod-tests:
     # TODO: re-enable when this check is a develop required check
     if: false
@@ -68,34 +65,6 @@ jobs:
         env:
           GITHUB_WORKSPACE: $GITHUB_WORKSPACE
 
-  # test_verified_codemods:
-  #   # changing the following value will significantly affect github's cost. Be careful and consult with the team before changing it.
-  #   if: false
-  #   runs-on: ubuntu-latest-32
-  #   environment: testing
-  #   concurrency:
-  #     group: ${{ github.workflow }}-${{github.ref}}-${{github.event_name == 'push'&& github.sha}}
-  #     cancel-in-progress: true
-  #   name: "Verified Codemod tests: Sync Graph=false"
-  #   steps:
-  #     - uses: actions/checkout@v4
-  #     - name: Setup backend
-  #       uses: ./.github/actions/setup-backend
-  #     - name: Run ATS and Tests
-  #       uses: ./.github/actions/run_ats
-  #       with:
-  #         default_tests: "tests/integration/codemod/test_verified_codemods.py"
-  #         codecov_static_token: ${{ secrets.CODECOV_STATIC_TOKEN }}
-  #         codecov_token: ${{ secrets.CODECOV_TOKEN }}
-  #         collect_args: "--cli-api-key ${{ secrets.PROD_CLI_API_KEY }} --token ${{ secrets.CODEGEN_BOT_GHE_TOKEN }}"
-  #         ats_collect_args: "--cli-api-key=${{ secrets.PROD_CLI_API_KEY }},--token=${{ secrets.CODEGEN_BOT_GHE_TOKEN }},"
-  #         base_sha: ${{github.event_name == 'pull_request' && github.event.pull_request.base.sha || github.event.before}}
-  #         job_name: ${{ github.job }}
-  #         codecov_flags: smart-tests-verified-codemod-tests
-  #       env:
-  #         CODEGEN_BOT_GHE_TOKEN: ${{ secrets.CODEGEN_BOT_GHE_TOKEN }}
-  #         GITHUB_WORKSPACE: $GITHUB_WORKSPACE
-
   parse-tests:
     runs-on: ubuntu-latest-32
     if: contains(github.event.pull_request.labels.*.name, 'parse-tests') || github.event_name == 'push' || github.event_name == 'workflow_dispatch'
@@ -161,54 +130,7 @@ jobs:
                 }
               ]
             }
-      #  test_codemod_diffs:
-      #    # changing the following value will significantly affect github's cost. Be careful and consult with the team before changing it.
-      #    runs-on: ubuntu-latest-16
-      #
-      #    steps:
-      #      - uses: actions/checkout@v4
-      #      - name: Setup backend
-      #        uses: ./.github/actions/setup-backend
-      #      - name: Cache oss-repos
-      #        uses: ./.github/actions/setup-oss-repos
-      #        with:
-      #          CODEGEN_BOT_GHE_TOKEN: ${{ secrets.CODEGEN_BOT_GHE_TOKEN }}
-      #      - name: Test with pytest
-      #        timeout-minutes: 10
-      #        run: |
-      #          ENV=local \
-      #          uv run pytest \
-      #            -n auto \
-      #            -vv \
-      #            --token $CODEGEN_BOT_GHE_TOKEN \
-      #            tests/codemod/test_diffs.py
-      #        env:
-      #          CODEGEN_BOT_GHE_TOKEN: ${{ secrets.CODEGEN_BOT_GHE_TOKEN }}
-      #          GITHUB_WORKSPACE: $GITHUB_WORKSPACE
-      #
-      #      - name: Publish Test Report (Verify diffs)
-      #        uses: mikepenz/action-junit-report@v4
-      #        if: (success() || failure()) # always publish report even if the tests fail
-      #        continue-on-error: true
-      #        with:
-      #          report_paths: "**/build/test-results/test/TEST.xml"
-      #          detailed_summary: true
-      #          annotate_only: true
 
-      # # Codecov is a required check but won't pass without a coverage report
-      # # Wwhen there are no changes in the backend (ex: frontend only change) we do an empty upload to force the check to pass
-      # - name: Upload empty coverage report to Codecov
-      #   if: env.skip == '0'
-      #   continue-on-error: true
-      #   env:
-      #     CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
-      #   run: |
-      #     cd codegen-backend
-      #     pip install codecov-cli
-      #     codecovcli create-commit -C ${{ github.event.pull_request.head.sha }}
-      #     codecovcli create-report -C ${{ github.event.pull_request.head.sha }}
-      #     codecovcli do-upload --disable-search --file empty_coverage.xml -C ${{ github.event.pull_request.head.sha }}
-      #     codecovcli empty-upload --force -C ${{ github.event.pull_request.head.sha }}
   integration-tests:
     runs-on: ubuntu-latest-16
     steps: