💚 Update worklow to test accessibility

.github/workflows/pull-request.yml

@@ -10,6 +10,10 @@ on:
       - "CONTRIBUTING.md"
       - "CODE_OF_CONDUCT.md"
 
+permissions:
+  pull-requests: write
+  contents: read
+
 jobs:
   compile-themes:
     runs-on: ubuntu-latest
@@ -38,3 +42,40 @@ jobs:
           sass src/themes/chimera-nightsky.scss build/chimera-nightsky.css
         shell: bash
         working-directory: ./chimera-css
+
+  accessibility-testing:
+    runs-on: ubuntu-latest
+    name: Running pa11y-ci tests on HTML file
+
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v2
+
+      - name: Install pa11y-ci dependencies
+        run: npm install -g pa11y-ci
+
+      - name: Run pa11y-ci on static HTML file
+        run: pa11y-ci file://$GITHUB_WORKSPACE/apps/demo/index.html 2>&1 | tee pa11y_output.txt
+
+      - name: Read pa11y_output file
+        id: pa11y_output
+        uses: juliangruber/read-file-action@v1
+        with:
+          path: ./pa11y_output.txt
+
+      - name: Comment on pull request
+        uses: thollander/actions-comment-pull-request@v3
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          message: '<details><summary>Pa11y testing results</summary>
+
+
+```${{ steps.pa11y_output.outputs.content }}```
+
+</details>'
+
+      - name: Check for pa11y failures
+        if: contains(steps.pa11y_output.outputs.content, 'errno 2')
+        run: |
+          echo "::error::The site is failing accessibility tests. Please review the comment in the pull request or the pa11y-ci step in the workflow for details."
+          exit 1

pa11yci.json

@@ -0,0 +1,9 @@
+{
+    "defaults": {
+      "standard": "WCAG2AA",
+      "timeout": 30000
+    },
+    "urls": [
+      "http://localhost:8080/index.html"
+    ]
+}