WP/DeprecatedClasses: add tests for namespaced names

I opted to add the tests in a separate file as for DeprecatedClassesUnitTest.1.inc the error lines are generated dynamically.

Author: rodrigoprimo

WordPress/Tests/WP/DeprecatedClassesUnitTest.2.inc

@@ -0,0 +1,20 @@
+<?php
+
+/*
+ * Safeguard correct handling of all types of namespaced class name references.
+ */
+$streams = new \WP_User_Search();
+$streams = new MyNamespace\WP_HTTP_Fsockopen();
+$streams = new \MyNamespace\WP_Customize_New_Menu_Section();
+$streams = new namespace\Sub\WP_Customize_New_Menu_Control();
+$streams = new namespace\WP_Privacy_Data_Export_Requests_Table();
+class MyClass1 extends \WP_Privacy_Data_Removal_Requests_Table {}
+class MyClass2 extends MyNamespace\Services_JSON {}
+class MyClass3 extends \MyNamespace\Services_JSON_Error {}
+class MyClass4 extends namespace\Sub\WP_Http_Curl {}
+class MyClass5 extends namespace\WP_Http_Streams {}
+\wp_user_search::do_something();
+MyNamespace\WP_HTTP_Fsockopen::do_something();
+\MyNamespace\WP_Customize_New_Menu_Section::do_something();
+namespace\Sub\WP_Customize_New_Menu_Control::do_something();
+namespace\WP_PRIVACY_DATA_EXPORT_REQUESTS_TABLE::do_something();

WordPress/Tests/WP/DeprecatedClassesUnitTest.php

@@ -39,6 +39,17 @@ public function getErrorList( $testFile = '' ) {
 				unset( $errors[16], $errors[18], $errors[21], $errors[26] );
 
 				return $errors;
+
+			case 'DeprecatedClassesUnitTest.2.inc':
+				return array(
+					6  => 1,
+					10 => 1,
+					11 => 1,
+					15 => 1,
+					16 => 1,
+					20 => 1,
+				);
+
 			default:
 				return array();
 		}