Try running only when needed

Author: NickColley

.github/workflows/tests.yml

@@ -176,6 +176,7 @@ jobs:
             cache: |
               .cache/jest
               .cache/puppeteer
+            puppeteer: true
             projects:
               - JavaScript component tests
 
@@ -190,6 +191,7 @@ jobs:
             cache: |
               .cache/jest
               .cache/puppeteer
+            puppeteer: true
             projects:
               - Accessibility tests
 
@@ -212,13 +214,15 @@ jobs:
           key: ${{ matrix.task.name }}-${{ runner.os }}
           path: ${{ matrix.task.cache }}
 
-      - name: Run test task in Windows
-        if: ${{ matrix.runner.name == 'Windows' }}
-        run: npx jest --color ${{ format('--coverage={0} --maxWorkers=2 --selectProjects "{1}"', matrix.task.coverage || false, join(matrix.task.projects, '", "')) }}
-
-      - name: Run test task in Ubuntu
-        if: ${{ matrix.runner.name == 'Ubuntu' }}
-        run: aa-exec --profile=chrome npx jest --color ${{ format('--coverage={0} --maxWorkers=2 --selectProjects "{1}"', matrix.task.coverage || false, join(matrix.task.projects, '", "')) }}
+      - name: Run test task
+        run: |
+          # Ubuntu requires a profile for developer builds of Chrome to run without errors.
+          # (https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md)
+          IS_UBUNTU="${{ matrix.runner.name == 'Ubuntu' }}"
+          # Puppeteer uses Chrome to execute tests.
+          USES_PUPPETEER="${{ matrix.task.puppeteer || false }}"
+          ${{ (IS_UBUNTU && USES_PUPPETEER) && "aa-exec --profile=chrome \" || "" }}
+          npx jest --color ${{ format('--coverage={0} --maxWorkers=2 --selectProjects "{1}"', matrix.task.coverage || false, join(matrix.task.projects, '", "')) }}
 
       - name: Save test coverage
         uses: actions/upload-artifact@v7.0.1