public function test_populate_network_meta( $meta, $expected ) {
    global $wpdb;

    $orig_sitemeta  = $wpdb->sitemeta;
    $wpdb->sitemeta = self::$sitemeta;

    populate_network_meta( 42, $meta );

    $results = array();
    foreach ( $expected as $meta_key => $value ) {
      if ( is_multisite() ) {
        $results[ $meta_key ] = get_network_option( 42, $meta_key );
      } else {
        $results[ $meta_key ] = $wpdb->get_var( $wpdb->prepare( "SELECT meta_value FROM {$wpdb->sitemeta} WHERE meta_key = %s AND site_id = %d", $meta_key, 42 ) );
      }
    }

    $wpdb->query( "TRUNCATE TABLE {$wpdb->sitemeta}" );

    $wpdb->sitemeta = $orig_sitemeta;

    $this->assertSame( $expected, $results );
  }