objc_class_properties.swift

// RUN: rm -rf %t && mkdir -p %t

// RUN: %clang %target-cc-options -isysroot %sdk -fobjc-arc %S/Inputs/ObjCClasses/ObjCClasses.m -c -o %t/ObjCClasses.o
// RUN: %target-build-swift -I %S/Inputs/ObjCClasses/ %t/ObjCClasses.o %s -o %t/a.out
// RUN: %target-run %t/a.out

// REQUIRES: executable_test
// REQUIRES: objc_interop

import Foundation
import StdlibUnittest
import ObjCClasses

class SwiftClass : ProtoWithClassProperty {
  static var getCount = 0
  static var setCount = 0

  private static var _value: CInt = 0

  @objc class func reset() {
    getCount = 0
    setCount = 0
    _value = 0
  }

  @objc class var value: CInt {
    get {
      getCount += 1
      return _value
    }
    set {
      setCount += 1
      _value = newValue
    }
  }

  @objc class var optionalClassProp: Bool {
    return true
  }
}

class Subclass : ClassWithClassProperty {
  static var getCount = 0
  static var setCount = 0
  
  override class func reset() {
    getCount = 0
    setCount = 0
    super.reset()
  }

  override class var value: CInt {
    get {
      getCount += 1
      return super.value
    }
    set {
      setCount += 1
      super.value = newValue
    }
  }

  override class var optionalClassProp: Bool {
    return true
  }
}

var ClassProperties = TestSuite("ClassProperties")

ClassProperties.test("direct") {
  ClassWithClassProperty.reset()
  expectEqual(0, ClassWithClassProperty.value)
  ClassWithClassProperty.value = 4
  expectEqual(4, ClassWithClassProperty.value)

  Subclass.reset()
  expectEqual(0, Subclass.value)
  Subclass.value = 4
  expectEqual(4, Subclass.value)
  expectEqual(2, Subclass.getCount)
  expectEqual(1, Subclass.setCount)
}

func testExistential(_ e: ProtoWithClassProperty.Type) {
  e.reset()
  expectEqual(0, e.value)
  e.value = 4
  expectEqual(4, e.value)
}

ClassProperties.test("existentials") {
  testExistential(ClassWithClassProperty.self)
  testExistential(ObjCSubclassWithClassProperty.self)

  testExistential(SwiftClass.self)
  expectEqual(2, SwiftClass.getCount)
  expectEqual(1, SwiftClass.setCount)

  testExistential(Subclass.self)
  expectEqual(2, Subclass.getCount)
  expectEqual(1, Subclass.setCount)
}

func testGeneric<T: ProtoWithClassProperty>(_ e: T.Type) {
  e.reset()
  expectEqual(0, e.value)
  e.value = 4
  expectEqual(4, e.value)
}

ClassProperties.test("generics") {
  testGeneric(ClassWithClassProperty.self)
  testGeneric(ObjCSubclassWithClassProperty.self)

  testGeneric(SwiftClass.self)
  expectEqual(2, SwiftClass.getCount)
  expectEqual(1, SwiftClass.setCount)

  testGeneric(Subclass.self)
  expectEqual(2, Subclass.getCount)
  expectEqual(1, Subclass.setCount)
}

func testInheritance(_ e: ClassWithClassProperty.Type) {
  e.reset()
  expectEqual(0, e.value)
  e.value = 4
  expectEqual(4, e.value)
}

ClassProperties.test("inheritance") {
  testInheritance(ClassWithClassProperty.self)
  testInheritance(ObjCSubclassWithClassProperty.self)

  testInheritance(Subclass.self)
  expectEqual(2, Subclass.getCount)
  expectEqual(1, Subclass.setCount)
}

func testInheritanceGeneric<T: ClassWithClassProperty>(_ e: T.Type) {
  e.reset()
  expectEqual(0, e.value)
  e.value = 4
  expectEqual(4, e.value)
}

ClassProperties.test("inheritance/generic") {
  testInheritanceGeneric(ClassWithClassProperty.self)
  testInheritanceGeneric(ObjCSubclassWithClassProperty.self)

  testInheritanceGeneric(Subclass.self)
  expectEqual(2, Subclass.getCount)
  expectEqual(1, Subclass.setCount)
}

ClassProperties.test("optionalProp") {
  let noProp: ProtoWithClassProperty.Type = ClassWithClassProperty.self
  expectNil(noProp.optionalClassProp)

  let hasProp: ProtoWithClassProperty.Type = Subclass.self
  expectNotNil(hasProp.optionalClassProp)
  expectEqual(true, hasProp.optionalClassProp!)

  let hasOwnProp: ProtoWithClassProperty.Type = SwiftClass.self
  expectNotNil(hasOwnProp.optionalClassProp)
  expectEqual(true, hasOwnProp.optionalClassProp!)

  let hasPropObjC: ProtoWithClassProperty.Type = ObjCSubclassWithClassProperty.self
  expectNotNil(hasPropObjC.optionalClassProp)
  expectEqual(true, hasPropObjC.optionalClassProp!)
}

class NamingConflictSubclass : PropertyNamingConflict {
  override var prop: Any? { return nil }
  override class var prop: Any? { return NamingConflictSubclass() }
}

ClassProperties.test("namingConflict") {
  let obj = PropertyNamingConflict()
  expectTrue(obj === obj.prop.map { $0 as AnyObject })
  expectNil(type(of: obj).prop)
  expectNil(PropertyNamingConflict.prop)

  let sub = NamingConflictSubclass()
  expectNil(sub.prop)
  expectNotNil(type(of: sub).prop)
  expectNotNil(NamingConflictSubclass.prop)
}

extension NamingConflictSubclass : PropertyNamingConflictProto {
  var protoProp: Any? {
    get { return self }
    set {}
  }
  class var protoProp: Any? {
    get { return nil }
    set {}
  }
}

ClassProperties.test("namingConflict/protocol") {
  let obj: PropertyNamingConflictProto = NamingConflictSubclass()
  expectTrue(obj === obj.protoProp.map { $0 as AnyObject })
  expectNil(type(of: obj).protoProp)

  let type: PropertyNamingConflictProto.Type = NamingConflictSubclass.self
  expectNil(type.protoProp)
}

var global1: Int = 0

var global2: Int = 0

class Steak : NSObject {
  @objc override var thickness: Int {
    get { return global1 } set { global1 = newValue }
  }
}

extension NSObject : HasThickness {
  @objc var thickness: Int { get { return global2 } set { global2 = newValue } }
}

protocol HasThickness : class {
  var thickness: Int { get set }
}

ClassProperties.test("dynamicOverride") {
  // Calls NSObject.thickness
  NSObject().thickness += 1

  // Calls Steak.thickness
  (Steak() as NSObject).thickness += 1
  Steak().thickness += 1
  (Steak() as HasThickness).thickness += 1

  expectEqual(3, global1)
  expectEqual(1, global2)
}

runAllTests()