Add a test to confirm the token substitutes

...correctly

modules/opd_daily_emails/tests/src/Functional/DailyEmailTokenTest.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Drupal\Tests\opd_daily_emails\Functional;
+
+use Drupal\Tests\BrowserTestBase;
+use Drupal\Tests\node\Traits\NodeCreationTrait;
+use Drupal\Tests\token\Functional\TokenTestTrait;
+use Drupal\node\NodeInterface;
+use Symfony\Component\HttpFoundation\Response;
+
+class DailyEmailTokenTest extends BrowserTestBase {
+
+  use NodeCreationTrait;
+  use TokenTestTrait;
+
+  public $defaultTheme = 'stark';
+
+  public static $modules = [
+    'node',
+    'opd_daily_emails',
+  ];
+
+  public function test_the_token_returns_the_number_of_sent_daily_emails(): void {
+    $this->createDailyEmailNode(['status' => NodeInterface::PUBLISHED]);
+    $this->createDailyEmailNode(['status' => NodeInterface::NOT_PUBLISHED]);
+    $this->createDailyEmailNode(['status' => NodeInterface::PUBLISHED]);
+
+    $this->assertToken(
+      data: [],
+      expected: 2,
+      token: 'email-count',
+      type: 'opd-daily-emails',
+    );
+  }
+
+  private function createDailyEmailNode(array $options): NodeInterface {
+    return $this->createNode(array_merge(
+      $options,
+      [
+        'type' => 'daily_email',
+      ]
+    ));
+  }
+
+}

phpunit.xml.dist

@@ -16,7 +16,7 @@
   <php>
     <ini name="error_reporting" value="32767"/>
     <ini name="memory_limit" value="-1"/>
-    <env name="SIMPLETEST_BASE_URL" value=""/>
+    <env name="SIMPLETEST_BASE_URL" value="http://localhost:8888"/>
     <env name="SIMPLETEST_DB" value="sqlite://localhost//dev/shm/testing.sqlite"/>
     <env name="BROWSERTEST_OUTPUT_BASE_URL" value=""/>
     <env name="MINK_DRIVER_CLASS" value=""/>