DummyTypes.swift

@objcMembers
class DummyTypes: NSObject {
    @NSManaged var bool: Bool
    @NSManaged var decimal: Decimal
    @NSManaged var int: Int
    @NSManaged var double: Double
    @NSManaged var url: URL
    @NSManaged var uuid: UUID
    @NSManaged var date: Date
    @NSManaged var string: String
    @NSManaged var timeinterval: TimeInterval
    @NSManaged var data: Data
    @NSManaged var orderedset: NSOrderedSet
    @NSManaged var set: Set<NSObject>
    @NSManaged var array: Array<NSObject>
    @NSManaged var dictionary: Dictionary<NSObject, NSObject>
}

extension DummyTypes {
    static let typesByName: [String: String] = Dictionary(
        uniqueKeysWithValues: objc_property_t.propertyList(DummyTypes.self).map {
            ($0.propertyName(), $0.typeInfo())
        }
    )
}

i use this for core data unit testing