PHP/PregQuoteDelimiter: add tests for namespaced names

Author: rodrigoprimo

WordPress/Tests/PHP/PregQuoteDelimiterUnitTest.inc

@@ -4,12 +4,21 @@ preg_quote($keywords, '/'); // OK.
 preg_quote( $keywords, '`' ); // OK.
 
 preg_quote($keywords); // Warning.
-$textbody = preg_replace ( "/" . preg_quote($word) . "/", // Warning
+$textbody = preg_replace ( "/" . \PREG_quote($word) . "/", // Warning
                           "<i>" . $word . "</i>",
                           $textbody );
 
 // Safeguard support for PHP 8.0+ named parameters.
 preg_quote(delimiter: '#', str: $keywords); // OK.
 preg_quote(str: $keywords); // Warning.
-preg_quote(str: $keywords, delimitter: '#'); // Warning (typo in param name).
+Preg_QUOTE(str: $keywords, delimitter: '#'); // Warning (typo in param name).
 preg_quote(delimiter: '#'); // OK. Invalid function call, but that's not the concern of this sniff.
+
+/*
+ * Safeguard correct handling of all types of namespaced function calls.
+ */
+\preg_quote($keywords); // Warning.
+MyNamespace\preg_quote($keywords); // Ok.
+\MyNamespace\preg_quote($keywords); // Ok.
+namespace\preg_quote($keywords); // The sniff should start flagging this once it can resolve relative namespaces.
+namespace\Sub\preg_quote($keywords); // Ok.

WordPress/Tests/PHP/PregQuoteDelimiterUnitTest.php

@@ -40,6 +40,7 @@ public function getWarningList() {
 			7  => 1,
 			13 => 1,
 			14 => 1,
+			20 => 1,
 		);
 	}
 }