MDL-78553 behat: Add disable communication helper trait

communication/tests/behat/behat_communication.php

@@ -37,4 +37,13 @@ class behat_communication extends \behat_base {
     public function enable_communication_experimental_feature(): void {
         $this->setup_communication_configs();
     }
+
+    /**
+     * Disable communication experimental feature.
+     *
+     * @Given /^I disable communication experimental feature$/
+     */
+    public function disable_communication_experimental_feature(): void {
+        $this->disable_communication_configs();
+    }
 }

communication/tests/communication_test_helper_trait.php

@@ -35,6 +35,15 @@ trait communication_test_helper_trait {
         set_config('enablecommunicationsubsystem', 1);
     }
 
+    /**
+     * Disable configs for communication subsystem.
+     *
+     * @return void
+     */
+    protected function disable_communication_configs(): void {
+        set_config('enablecommunicationsubsystem', 0);
+    }
+
     /**
      * Get or create course if it does not exist
      *