Fix code quality issues and improve test framework

.github/workflows/wordpress-tests.yml

@@ -10,59 +10,59 @@ jobs:
   single-site-test:
     name: Single Site Tests
     runs-on: ubuntu-latest
-    
+
     steps:
-    - uses: actions/checkout@v3
-    
+    - uses: actions/checkout@v4
+
     - name: Setup Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
-        node-version: '16'
+        node-version: '20'
         cache: 'npm'
-    
+
     - name: Install dependencies
       run: npm ci
-    
+
     - name: Install wp-env
       run: npm install -g @wordpress/env
-    
+
     - name: Setup WordPress Single Site
       run: |
         chmod +x bin/setup-test-env.sh
         bash bin/setup-test-env.sh single
-    
+
     - name: Install Cypress
       run: npm install cypress
-    
+
     - name: Run Cypress tests
       run: npm run test:single:headless
 
   multisite-test:
     name: Multisite Tests
     runs-on: ubuntu-latest
-    
+
     steps:
-    - uses: actions/checkout@v3
-    
+    - uses: actions/checkout@v4
+
     - name: Setup Node.js
-      uses: actions/setup-node@v3
+      uses: actions/setup-node@v4
       with:
-        node-version: '16'
+        node-version: '20'
         cache: 'npm'
-    
+
     - name: Install dependencies
       run: npm ci
-    
+
     - name: Install wp-env
       run: npm install -g @wordpress/env
-    
+
     - name: Setup WordPress Multisite
       run: |
         chmod +x bin/setup-test-env.sh
         bash bin/setup-test-env.sh multisite
-    
+
     - name: Install Cypress
       run: npm install cypress
-    
+
     - name: Run Cypress tests
       run: npm run test:multisite:headless