Added test

tests/src/FunctionalJavascript/BuilderAlteredTemplatesTest.php

+<?php
+
+namespace Drupal\Tests\layout_paragraphs\FunctionalJavascript;
+
+/**
+ * Tests Layout Paragraphs Builder with altered paragraphs templates.
+ *
+ * This test uses the display suite module which alters the variables passed
+ * to the paragraph template, effectively testing the UI for cases where a
+ * paragraph template has been adjusted and no longer renders the entire
+ * content array.
+ *
+ * @see https://www.drupal.org/project/layout_paragraphs/issues/3244055
+ * @see https://www.drupal.org/project/layout_paragraphs/issues/3244654
+ *
+ * @group layout_paragraphs
+ */
+class BuilderAlteredTemplatesTest extends BuilderTest {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'layout_paragraphs',
+    'paragraphs',
+    'node',
+    'field',
+    'field_ui',
+    'block',
+    'paragraphs_test',
+    'ds',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp(): void {
+    parent::setUp();
+    $this->loginWithPermissions([
+      'administer site configuration',
+      'administer node fields',
+      'administer node display',
+      'administer paragraphs types',
+      'administer paragraph fields',
+      'administer paragraph display',
+    ]);
+    // Enable Layout Paragraphs behavior for section paragraph type.
+    $this->drupalGet('admin/structure/paragraphs_type/text/display');
+    $this->submitForm([
+      'ds_layout' => 'layout_onecol',
+    ], 'Save');
+    $this->assertSession()->pageTextContains('Your settings have been saved.');
+  }
+
+}