WP/I18n: add tests for namespaced names

I'm adding three different tests for fully qualified global function calls to cover all the global functions that are referenced directly in the `I18nSniff::process_matched_token()` method.

Author: rodrigoprimo

WordPress/Tests/WP/I18nUnitTest.1.inc

@@ -317,4 +317,14 @@ esc_html_e( 'foo', '' ); // Bad: text-domain can not be empty.
 // PHP 8.0+: safeguard handling of newly introduced placeholders.
 __( 'There are %1$h monkeys in the %H', 'my-slug' ); // Bad: multiple arguments should be numbered.
 
+/*
+ * Safeguard correct handling of all types of namespaced function calls.
+ */
+\_( 'foo', 'my-slug' ); // Bad.
+\translate( 'foo', 'my-slug' ); // Bad.
+\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // Bad.
+MyNamespace\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // Ok.
+\MyNamespace\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // Ok.
+namespace\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // The sniff should start flagging this once it can resolve relative namespaces.
+
 // phpcs:enable WordPress.WP.I18n.MissingTranslatorsComment

WordPress/Tests/WP/I18nUnitTest.1.inc.fixed

@@ -317,4 +317,14 @@ esc_html_e( 'foo', '' ); // Bad: text-domain can not be empty.
 // PHP 8.0+: safeguard handling of newly introduced placeholders.
 __( 'There are %1$h monkeys in the %H', 'my-slug' ); // Bad: multiple arguments should be numbered.
 
+/*
+ * Safeguard correct handling of all types of namespaced function calls.
+ */
+\_( 'foo', 'my-slug' ); // Bad.
+\translate( 'foo', 'my-slug' ); // Bad.
+\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // Bad.
+MyNamespace\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // Ok.
+\MyNamespace\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // Ok.
+namespace\translate_with_gettext_context( 'foo', 'bar', 'my-slug' ); // The sniff should start flagging this once it can resolve relative namespaces.
+
 // phpcs:enable WordPress.WP.I18n.MissingTranslatorsComment

WordPress/Tests/WP/I18nUnitTest.php

@@ -148,6 +148,7 @@ public function getErrorList( $testFile = '' ) {
 					311 => 1,
 					315 => 1,
 					318 => 1,
+					323 => 1,
 				);
 
 			case 'I18nUnitTest.2.inc':
@@ -217,6 +218,8 @@ public function getWarningList( $testFile = '' ) {
 					300 => 1,
 					301 => 1,
 					302 => 1,
+					324 => 1,
+					325 => 1,
 				);
 
 			case 'I18nUnitTest.2.inc':