Issue #3224726 by dww: Add test coverage for #3054902

tests/src/Functional/FormModeManagerRouteTest.php

@@ -24,6 +24,12 @@ class FormModeManagerRouteTest extends FormModeManagerBase {
   public function testAnonymousSpecificFormModeManagerRoutes() {
     $node_form_mode_id = $this->formModeManager->getFormModeMachineName($this->nodeFormMode->id());
 
+    $node_type_test_page = $this->drupalCreateContentType([
+      'type' => 'test_page',
+      'name' => 'Test Page',
+    ]);
+    $this->setUpFormMode("admin/structure/types/manage/test_page/form-display", $this->nodeFormMode->id());
+
     $this->drupalLogin($this->anonymousUser);
     Role::load($this->anonymousUser->getRoles()[1])
       ->grantPermission("use {$this->nodeFormMode->id()} form mode")
@@ -52,6 +58,19 @@ class FormModeManagerRouteTest extends FormModeManagerBase {
     // Edit a node with default form mode not available.
     $this->drupalGet("node/{$this->node1->id()}/edit");
     $this->assertSession()->statusCodeEquals(403);
+
+    // Make sure we can't add test_page content as this "anonymous" user.
+    $this->drupalGet("node/add/test_page");
+    $this->assertSession()->statusCodeEquals(403);
+    // Even if using a specific form mode.
+    $this->drupalGet("node/add/test_page/{$node_form_mode_id}");
+    $this->assertSession()->statusCodeEquals(403);
+
+    $this->drupalLogin($this->rootUser);
+    $this->drupalGet("node/add/test_page");
+    $this->assertSession()->statusCodeEquals(200);
+    $this->drupalGet("node/add/test_page/{$node_form_mode_id}");
+    $this->assertSession()->statusCodeEquals(200);
   }
 
   /**