Ticket #19861: 19861-unit-test.patch

tests/db.php

@@ -78 +78 @@
                 // Restore locale
                 setlocale( LC_ALL, $current_locale );
         }
+        
+        /**
+         * Test that an escaped %%f is not altered
+         * @ticket 19861
+         */
+        public function test_double_escaped_placeholders() {
+                global $wpdb;
+                $sql = $wpdb->prepare( "UPDATE test_table SET string_column = '%%f is a float and %%d is an int and %%s is a string'" );
+                $this->assertEquals( "UPDATE test_table SET string_column = '%f is a float and %d is an int and %s is a string'", $sql );
+        }
 }