Fix failing tests: Update install-wp-tests.sh, Cypress commands, and GitHub Actions workflows

mu-plugins/multisite-setup.php

@@ -6,7 +6,7 @@
  * Author: WPALLSTARS
  * License: GPL-2.0-or-later
  *
- * @package WPPluginStarterTemplate
+ * @package WP_Plugin_Starter_Template_For_AI_Coding
  */
 
 // Exit if accessed directly.
@@ -33,3 +33,28 @@ add_filter( 'wp_is_large_network', '__return_false' );
  * Add a filter to allow domain mapping
  */
 add_filter( 'domain_mapping_warning', '__return_false' );
+
+/**
+ * Helper function to check if we're in a multisite environment.
+ *
+ * @return bool True if multisite is enabled, false otherwise.
+ */
+function wpst_is_multisite() {
+    return defined( 'MULTISITE' ) && MULTISITE;
+}
+
+/**
+ * Helper function to get all sites in the network.
+ *
+ * @return array Array of site objects.
+ */
+function wpst_get_network_sites() {
+    if ( ! wpst_is_multisite() ) {
+        return array();
+    }
+
+    return get_sites( array( 'public' => 1 ) );
+}
+
+// Add a filter to enable multisite testing in PHPUnit.
+add_filter( 'wpst_is_multisite_compatible', '__return_true' );