DB/RestrictedClasses: add tests for namespaced names

Author: rodrigoprimo

WordPress/Tests/DB/RestrictedClassesUnitTest.1.inc

@@ -30,7 +30,7 @@ class MyMysqli extends mysqli {}
 class YourMysqli extends \mysqli {}
 
 class OurMysqli implements mysqli {}
-class TheirMysqli implements \mysqli {}
+class TheirMysqli implements \MYSQLI {}
 
 $db5 = new PDO();
 $db6 = ( new PDO() )->exec();
@@ -115,3 +115,20 @@ $anon = new readonly class {
 $anon = new readonly class() extends PDOStatement {}; // Error.
 
 $anon = new #[MyAttribute] readonly class {};
+
+/*
+ * Safeguard correct handling of namespaced class references (the namespace types not handled below are already handled
+ * in other tests above).
+ */
+$obj = new MyNamespace\PDO();
+$obj = new \MyNamespace\PDOStatement();
+$obj = new namespace\Sub\mysqli();
+$obj = new namespace\PDO();
+class MyClass1 extends MyNamespace\mysqli {}
+class MyClass2 extends \MyNamespace\PDO {}
+class MyClass3 extends namespace\Sub\PDOStatement {}
+class MyClass4 extends namespace\mysqli {}
+MyNamespace\mysqli::do_something();
+\MyNamespace\PDO::do_something();
+namespace\Sub\PDOStatement::do_something();
+namespace\MYSQLI::do_something();

WordPress/Tests/DB/RestrictedClassesUnitTest.php

@@ -102,6 +102,9 @@ public function getErrorList( $testFile = '' ) {
 					103 => 1,
 					106 => 1,
 					115 => 1,
+					126 => 1,
+					130 => 1,
+					134 => 1,
 				);
 
 			case 'RestrictedClassesUnitTest.2.inc':