Ticket #21459: 21459.testcase.ms-switch-inteference.php

<?php

if ( is_multisite() ) :

/**
 * A set of unit tests for WordPress Multisite
 *
 * @group multisite
 */
class Tests_MS_Switch_Interference extends WP_UnitTestCase {

        function test_interference() {
                global $wpdb, $current_site;

                $user1_id = $this->factory->user->create( array( 'role' => 'administrator' ) );
                $blog_ids = array();
                $blog_ids[] = $this->factory->blog->create( array( 'title' => 'site1', 'user_id' => $user1_id ) );
                $blog_ids[] = $this->factory->blog->create( array( 'title' => 'site2' ) );
                $blog_ids[] = $this->factory->blog->create( array( 'title' => 'site3', 'user_id' => $user1_id ) );
                wp_set_current_user( $user1_id );

                $sites = array();
                foreach ( $blog_ids as $blog_id ) {
                        if( !current_user_can_for_blog( $blog_id , 'upload_files') ) continue;
                        $sites[] = get_blog_option( $blog_id, 'blogname' );
                }

                $this->assertEquals( array( 'site1', 'site3' ), $sites );

                // cleanup
                foreach ( $blog_ids as $blog_id ) {
                        wpmu_delete_blog( $blog_id, true );
                }
        }
}
endif;