Ticket #43583: 43583.diff

src/wp-includes/compat.php

@@ -520 +520 @@
          * @return bool True if `$var` is countable, false otherwise.
          */
         function is_countable( $var ) {
-                return ( is_array( $var ) || $var instanceof Countable );
+                return ( is_array( $var )
+                         || $var instanceof Countable
+                         || $var instanceof SimpleXMLElement
+                         || $var instanceof ResourceBundle
+                );
         }
 }
 

tests/phpunit/tests/compat.php

@@ -200 +200 @@
          * @ticket 43583
          *
          * @dataProvider countable_variable_test_data
+         *
+         * @type mixed $variable     Variable to check.
+         * @type bool  $is_countable The expected return value of PHP 7.3 is_countable() function.
          */
         function test_is_countable_functionality( $variable, $is_countable ) {
-                $this->assertEquals( is_countable( $variable ), $is_countable );
+                $this->assertSame( is_countable( $variable ), $is_countable );
         }
 
         /**
+         * Test is_countable() polyfill for ResourceBundle.
+         *
+         * @ticket 43583
+         */
+        function test_is_countable_ResourceBundle() {
+                if ( ! class_exists( 'ResourceBundle' ) ) {
+                        $this->markTestSkipped( 'The intl extension is not loaded. ResourceBundle not tested for is_countable().' );
+                }
+
+                $this->assertTrue( is_countable( new ResourceBundle( 'en', null ) ) );
+        }
+
+        /**
+         * Test is_countable() polyfill for SimpleXMLElement.
+         *
+         * @ticket 43583
+         */
+        function test_is_countable_SimpleXMLElement() {
+                if ( ! class_exists( 'SimpleXMLElement' ) ) {
+                        $this->markTestSkipped( 'The xml extension is not loaded. SimpleXMLElement not tested for is_countable().' );
+                }
+
+                $this->assertTrue( is_countable( new SimpleXMLElement( '<xml><tag>1</tag><tag>2</tag></xml>' ) ) );
+        }
+
+        /**
          * Data provider for test_is_countable_functionality().
          *
          * @ticket 43583