Ensure it returns a 200 response

web/modules/custom/opdavies_talks/opdavies_talks.info.yml

@@ -0,0 +1,3 @@
+name: Talks
+type: module
+core_version_requirement: ^10

web/modules/custom/opdavies_talks/opdavies_talks.routing.yml

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+opdavies_talks.page:
+  path: /talks
+  defaults:
+    _controller: Drupal\opdavies_talks\Controller\TalksPageController
+  requirements:
+    _permission: access content

web/modules/custom/opdavies_talks/src/Controller/TalksPageController.php

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+<?php
+
+declare(strict_types=1);
+
+namespace Drupal\opdavies_talks\Controller;
+
+final class TalksPageController {
+
+  public function __invoke(): array {
+    return [];
+  }
+
+}

web/modules/custom/opdavies_talks/tests/src/Functional/TalksPageTest.php

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+<?php
+
+namespace Drupal\Tests\opdavies_talks\Functional;
+
+use Drupal\Tests\BrowserTestBase;
+use Symfony\Component\HttpFoundation\Response;
+
+class TalksPageTest extends BrowserTestBase {
+
+  public $defaultTheme = 'stark';
+
+  public static $modules = ['node', 'opdavies_talks'];
+
+  public function test_it_returns_a_200_response_code(): void {
+    $this->drupalGet('/talks');
+
+    $session = $this->assertSession();
+    $session->statusCodeEquals(Response::HTTP_OK);
+  }
+
+}