Add tests safeguarding that non-ANSCII characters are handled correctly when looking for nonce verification functions

Author: rodrigoprimo

WordPress/Tests/Security/NonceVerificationUnitTest.1.inc

@@ -501,3 +501,26 @@ function non_ascii_characters() {
     update_post_meta( (int) $_POST['id'], 'a_key', $_POST['a_value'] );
 }
 // phpcs:set WordPress.Security.NonceVerification customNonceVerificationFunctions[]
+
+/*
+ * Test case handling of non-ASCII characters in function names.
+ */
+// phpcs:set WordPress.Security.NonceVerification customNonceVerificationFunctions[] déjà_vu
+function same_function_same_case() {
+    déjà_vu( 'something' ); // Ok.
+
+    update_post_meta( (int) $_POST['id'], 'a_key', $_POST['a_value'] );
+}
+
+function same_function_different_case() {
+    DéJà_VU( 'something' ); // Ok.
+
+    update_post_meta( (int) $_POST['id'], 'a_key', $_POST['a_value'] );
+}
+
+function different_function_name() {
+    dÉjÀ_vu( 'something' ); // Bad, dÉjÀ_vu() and déjà_vu() are NOT the same function.
+
+    update_post_meta( (int) $_POST['id'], 'a_key', $_POST['a_value'] );
+}
+// phpcs:set WordPress.Security.NonceVerification customNonceVerificationFunctions[]

WordPress/Tests/Security/NonceVerificationUnitTest.php

@@ -74,6 +74,7 @@ public function getErrorList( $testFile = '' ) {
 					453 => 1,
 					470 => 1,
 					478 => 1,
+					524 => 2,
 				);
 
 			case 'NonceVerificationUnitTest.2.inc':