使用Realm进行单元测试：未声明的类型

import RealmSwift

// MARK: Class

/// The DataPoint object representation
public class DataPoint: Object {

  // MARK: - Variables

  /// The latitude of the point
  dynamic var lat: Double = 0
  /// The longitude of the point
  dynamic var lng: Double = 0
  /// The accuracy of the point
  dynamic var accuracy: Double = 0

  /// The added point date of the point
  dynamic var dateAdded: Date = Date()
  /// The last sync date of the point
  dynamic var lastSynced: Date?
}
import RealmSwift

// MARK: Class

/// The Data