AbstractClassRestrictionsSniff sniffs: add tests for namespaced names

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':

WordPress/Tests/WP/ClassNameCaseUnitTest.inc

@@ -65,3 +65,21 @@ class NotYetDetected {
 	public function paramTypeDeclaration( wp_role $role ) {}
 	public function returnTypeDeclaration() : WP_TERM {}
 }
+
+/*
+ * Safeguard correct handling of namespaced class references (the namespace types not handled below are already handled
+ * in other tests above).
+ */
+$obj = new MyNamespace\atomEntry();
+$obj = new \MyNamespace\core_upgrader();
+$obj = new namespace\Sub\file_upload_upgrader();
+$obj = new namespace\pop3();
+class MyClass2 extends MyNamespace\twentytwenty_walker_page {}
+class MyClass3 extends \MyNamespace\TWENTY_ELEVEN_EPHEMERA_WIDGET {}
+class MyClass4 extends namespace\Sub\twenty_Twenty_One_SVG_icons {}
+class MyClass5 extends namespace\twentynineteen_SVG_icons {}
+\avifinfo\Box::prepare_query();
+MyNamespace\Avifinfo\CHAN_PROP::prepare_query();
+\MyNamespace\Avifinfo\features::prepare_query();
+namespace\Sub\AVIFINFO\parser::prepare_query();
+namespace\AVIFINFO\TILE::prepare_query();

WordPress/Tests/WP/ClassNameCaseUnitTest.php

@@ -45,6 +45,10 @@ public function getWarningList() {
 			47 => 1,
 			48 => 1,
 			49 => 1,
+			76 => 1,
+			80 => 1,
+			81 => 1,
+			85 => 1,
 		);
 	}
 }

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

@@ -24,17 +24,35 @@ final class DeprecatedClassesUnitTest extends AbstractSniffUnitTest {
 	/**
 	 * Returns the lines where errors should occur.
 	 *
+	 * @param string $testFile The test file to check for errors.
+	 *
 	 * @return array<int, int> Key is the line number, value is the number of expected errors.
 	 */
-	public function getErrorList() {
-		$start_line = 9;
-		$end_line   = 28;
-		$errors     = array_fill( $start_line, ( ( $end_line - $start_line ) + 1 ), 1 );
+	public function getErrorList( $testFile = '' ) {
+		switch ( $testFile ) {
+			case 'DeprecatedClassesUnitTest.1.inc':
+				$start_line = 9;
+				$end_line   = 28;
+				$errors     = array_fill( $start_line, ( ( $end_line - $start_line ) + 1 ), 1 );
+
+				// Unset the lines related to version comments.
+				unset( $errors[16], $errors[18], $errors[21], $errors[26] );
+
+				return $errors;
 
-		// Unset the lines related to version comments.
-		unset( $errors[16], $errors[18], $errors[21], $errors[26] );
+			case 'DeprecatedClassesUnitTest.2.inc':
+				return array(
+					6  => 1,
+					10 => 1,
+					11 => 1,
+					15 => 1,
+					16 => 1,
+					20 => 1,
+				);
 
-		return $errors;
+			default:
+				return array();
+		}
 	}
 
 	/**