Ticket #41716: 41716.3.diff

tests/phpunit/tests/dbdelta.php

@@ -361 +361 @@
                         $this->markTestSkipped( 'This test requires utf8mb4 support in MySQL.' );
                 }
 
-                $table_name = 'test_truncated_index';
+                // This table needs to be actually created
+                remove_filter( 'query', array( $this, '_create_temporary_tables' ) );
+                remove_filter( 'query', array( $this, '_drop_temporary_tables' ) );
+
+                $table_name = "{$wpdb->prefix}test_truncated_index";
+
+                $create = "
+                        CREATE TABLE $table_name (
+                                a varchar(255) COLLATE utf8mb4_unicode_ci,
+                                KEY a_key (a)
+                        ) ENGINE=InnoDB ROW_FORMAT=DYNAMIC";
 
-                $create = "CREATE TABLE $table_name (\n a varchar(255) COLLATE utf8mb4_unicode_ci,\n KEY a (a)\n)";
                 $wpdb->query( $create );
 
+                $index = $wpdb->get_row( "SHOW INDEXES FROM $table_name WHERE Key_name='a_key';" );
+
                 $actual = dbDelta( $create, false );
 
+                $wpdb->query( "DROP TABLE IF EXISTS $table_name;" );
+
+                if ( 191 != $index->Sub_part ) {
+                        $this->markTestSkipped( "This test requires the index to be truncated." );
+                }
+
                 $this->assertSame( array(), $actual );
         }