[#3341438] - Add additional test coverage for layout_builder_entity_view_alter

Closes #3341438

core/modules/layout_builder/tests/src/Kernel/EntityViewAlterTest.php

+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\Tests\layout_builder\Kernel;
+
+use Drupal\Core\Routing\RouteObjectInterface;
+use Drupal\entity_test\Entity\EntityTest;
+use Drupal\KernelTests\KernelTestBase;
+use Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Session\Session;
+use Symfony\Component\HttpFoundation\Session\Storage\MockArraySessionStorage;
+use Symfony\Component\Routing\Route;
+
+/**
+ * @covers layout_builder_entity_view_alter
+ *
+ * @group layout_builder
+ */
+class EntityViewAlterTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'layout_discovery',
+    'layout_builder',
+    'layout_builder_defaults_test',
+    'entity_test',
+    'user',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp(): void {
+    parent::setUp();
+    entity_test_create_bundle('bundle_with_extra_fields');
+    $this->installEntitySchema('entity_test');
+    $this->installConfig(['layout_builder_defaults_test']);
+  }
+
+  /**
+   * Tests that contextual links are removed when rendering Layout Builder.
+   */
+  public function testContextualLinksRemoved(): void {
+    $display = LayoutBuilderEntityViewDisplay::load('entity_test.bundle_with_extra_fields.default');
+    $entity = EntityTest::create();
+    $build = [
+      '#contextual_links' => ['entity.node.canonical'],
+    ];
+    // Create a fake request that starts with layout_builder.
+    $request = Request::create('<front>');
+    $request->attributes->set(RouteObjectInterface::ROUTE_NAME, 'layout_builder.test');
+    $request->attributes->set(RouteObjectInterface::ROUTE_OBJECT, new Route('/'));
+    $request->setSession(new Session(new MockArraySessionStorage()));
+    \Drupal::requestStack()->push($request);
+    // Assert the contextual links are removed.
+    layout_builder_entity_view_alter($build, $entity, $display);
+    $this->assertArrayNotHasKey('#contextual_links', $build);
+  }
+
+}