Ticket #23431: 23431.3.diff

src/wp-content/themes/twentynineteen/style.css

@@ -6615 +6615 @@
 .gallery-item > div > a:focus {
   box-shadow: 0 0 0 2px #0073aa;
 }
+.testing {
+        color: blue;
+}
+ No newline at end of file

src/wp-includes/class-wp-embed.php

@@ -34 +34 @@
                 add_filter( 'widget_block_content', array( $this, 'run_shortcode' ), 8 );
 
                 // Shortcode placeholder for strip_shortcodes().
-                add_shortcode( 'embed', '__return_false' );
+                add_shortcode( 'embed', array( $this, 'shortcode' ) );
 
                 // Attempts to embed all URLs in a post.
                 add_filter( 'the_content', array( $this, 'autoembed' ), 8 );

tests/phpunit/tests/oembed/WpEmbed.php

@@ -377 +377 @@
                 $this->wp_embed->linkifunknown = false;
                 $this->assertSame( $url, $this->wp_embed->maybe_make_link( $url ) );
         }
+
+        /**
+         * @ticket 23431
+         */
+        public function test_embed_shortcode() {
+                $content = '[embed]https://example.org/path/to/video[/embed]';
+                $this->assertNotEmpty( do_shortcode( $content ) );
+        }
 }