Ticket #34010: 34010.2.diff

src/wp-includes/post.php

@@ -1552 +1552 @@
 }
 
 /**
+ * Get a list of post type names that support a specific feature.
+ *
+ * @since 4.5.0
+ *
+ * @param array|string $args Single feature or an array of features the post types should support.
+ * @return array A list of post type names.
+ */
+function get_post_types_by_support( $args ) {
+        global $_wp_post_type_features;
+
+        $features = array_fill_keys( (array) $args, true );
+
+        return array_keys( wp_filter_object_list( $_wp_post_type_features, $features ) );
+}
+
+/**
  * Update the post type for the post ID.
  *
  * The page or post cache will be cleaned for the post ID.

tests/phpunit/tests/post/types.php

@@ -159 +159 @@
 
                 _unregister_post_type( 'foo' );
         }
+
+        /**
+         * @ticket 34010
+         */
+        public function test_get_post_types_by_support_single_feature() {
+                $this->assertSame( array(
+                        'post',
+                        'page',
+                        'attachment',
+                        'nav_menu_item',
+                ), get_post_types_by_support( 'title' ) );
+        }
+
+        /**
+         * @ticket 34010
+         */
+        public function test_get_post_types_by_support_multiple_features() {
+                $this->assertSame( array( 'post', 'page' ), get_post_types_by_support( array( 'thumbnail', 'author' ) ) );
+        }
+
+        /**
+         * @ticket 34010
+         */
+        public function test_get_post_types_by_support_excluding_features() {
+                $this->assertSame( array(), get_post_types_by_support( array( 'post-formats', 'page-attributes' ) ) );
+        }
+
+        /**
+         * @ticket 34010
+         */
+        public function test_get_post_types_by_support_non_existant_feature() {
+                $this->assertSame( array(), get_post_types_by_support( 'somefeature' ) );
+        }
 }