OEL-486: Add facets summary test.

tests/src/Functional/FacetsSummaryTest.php

+<?php
+
+declare(strict_types = 1);
+
+namespace Drupal\Tests\oe_whitelabel\Functional;
+
+use Drupal\facets\Entity\Facet;
+use Drupal\facets_summary\Entity\FacetsSummary;
+use Drupal\Tests\facets\Functional\BlockTestTrait;
+use Drupal\Tests\facets\Functional\ExampleContentTrait;
+
+/**
+ * Tests the Facets Summary rendering.
+ */
+class FacetsSummaryTest extends WhitelabelBrowserTestBase {
+
+  use ExampleContentTrait;
+  use BlockTestTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'block',
+    'facets_search_api_dependency',
+    'facets_summary',
+    'oe_whitelabel_helper',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUp(): void {
+    parent::setUp();
+    $this->setUpExampleStructure();
+    $this->insertExampleContent();
+    $this->assertSame(5, $this->indexItems('database_search_index'));
+  }
+
+  /**
+   * Tests facets summary block rendering.
+   */
+  public function testFacetsSummaryBlock(): void {
+    $this->createFacet('Emu', 'emu', 'type', 'page_1', 'views_page__search_api_test_view', FALSE);
+    $facet = Facet::load('emu');
+    $facet->setOnlyVisibleWhenFacetSourceIsVisible(FALSE);
+    $facet->setWidget('links');
+    $facet->save();
+
+    FacetsSummary::create([
+      'name' => 'Owl',
+      'id' => 'owl',
+      'facet_source_id' => 'search_api:views_page__search_api_test_view__page_1',
+      'facets' => [
+        'emu' => [
+          'checked' => TRUE,
+          'show_count' => FALSE,
+        ],
+      ],
+      'processor_configs' => [
+        'show_count' => [
+          'processor_id' => 'show_count',
+        ],
+      ],
+    ])->save();
+
+    $block = $this->placeBlock('facets_summary_block:owl', ['region' => 'content']);
+    $this->drupalGet('search-api-test-fulltext');
+
+    $assert = $this->assertSession();
+    $assert->elementTextContains('css', 'h4.mb-4', $block->label());
+    $assert->elementTextContains('css', 'h4.mb-4 span.source-summary-count', '(5)');
+  }
+
+}