Issue #3232565: Tests: remove duplicated code by using assertEmailReroutedFromTestForm()

tests/src/Functional/ContactTest.php

@@ -68,7 +68,7 @@ class ContactTest extends RerouteEmailTestBase {
    * @throws \Behat\Mink\Exception\ExpectationException
    *   Thrown when the requested page status code is a different one.
    */
-  public function testBasicNotification() {
+  public function testBasicNotification(): void {
     // Additional destination email address used for testing the allowed list.
     $additional_destination = 'additional@example.com';
 
@@ -136,7 +136,7 @@ class ContactTest extends RerouteEmailTestBase {
 
     // There should be nothing in the body except the contact message - no
     // body injection like 'Originally to'.
-    $this->assertTrue(strpos($mail['body'], 'Originally to') === FALSE, 'Body does not contain "Originally to".');
+    $this->assertStringNotContainsString('Originally to', $mail['body'], 'Body does not contain "Originally to".');
     $this->assertEquals($mail['headers']['X-Rerouted-Original-To'], $this->originalDestination, 'X-Rerouted-Original-To is correctly set to the original destination email.');
   }