Ticket #39032: 39032.with-tests.diff

src/wp-includes/theme.php

@@ -1786 +1786 @@
                 $r = wp_update_post( wp_slash( $post_data ), true );
         } else {
                 $r = wp_insert_post( wp_slash( $post_data ), true );
+                // Trigger creation of a revision. See #30854
+                if ( ! is_wp_error( $r ) && 0 === count( wp_get_post_revisions( $r ) ) ) {
+                        wp_save_post_revision( $r );
+                }
         }
 
-        if ( $r instanceof WP_Error ) {
+        if ( is_wp_error( $r ) ) {
                 return $r;
         }
         return get_post( $r );

tests/phpunit/tests/customize/custom-css-setting.php

@@ -193 +193 @@
         }
 
         /**
+         * Test revision saving on initial save of Custom CSS.
+         *
+         * @ticket 39032
+         */
+        function test_custom_css_revision_saved() {
+                $r = wp_update_custom_css_post( 'body { background: black; }', array(
+                        'stylesheet' => 'testtheme',
+                ) );
+
+                $this->assertCount( 1, wp_get_post_revisions( $r ) );
+
+                wp_update_custom_css_post( 'body { background: red; }', array(
+                        'stylesheet' => 'testtheme',
+                ) );
+
+                $this->assertCount( 2, wp_get_post_revisions( $r ) );
+        }
+
+        /**
          * Test crud methods on WP_Customize_Custom_CSS_Setting.
          *
          * @covers WP_Customize_Custom_CSS_Setting::value()