TestFoundation/TestUserDefaults.swift - third_party/swift-corelibs-foundation - Git at Google

 // This source file is part of the Swift.org open source project
 //
 // Copyright (c) 2016 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See http://swift.org/LICENSE.txt for license information
 // See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //

 #if DEPLOYMENT_RUNTIME_OBJC || os(Linux)
 	import Foundation
 	import XCTest
 #else
 	import SwiftFoundation
 	import SwiftXCTest
 #endif

 class TestUserDefaults : XCTestCase {
 	static var allTests : [(String, (TestUserDefaults) -> () throws -> ())] {
 		return [
 			("test_createUserDefaults", test_createUserDefaults ),
 			("test_getRegisteredDefaultItem", test_getRegisteredDefaultItem ),
 			("test_getRegisteredDefaultItem_NSString", test_getRegisteredDefaultItem_NSString ),
 			("test_getRegisteredDefaultItem_String", test_getRegisteredDefaultItem_String ),
 			("test_getRegisteredDefaultItem_NSURL", test_getRegisteredDefaultItem_NSURL ),
 			("test_getRegisteredDefaultItem_URL", test_getRegisteredDefaultItem_URL ),
 			("test_getRegisteredDefaultItem_NSData", test_getRegisteredDefaultItem_NSData ),
 			("test_getRegisteredDefaultItem_Data)", test_getRegisteredDefaultItem_Data ),
 			("test_getRegisteredDefaultItem_BoolFromString", test_getRegisteredDefaultItem_BoolFromString ),
 			("test_getRegisteredDefaultItem_IntFromString", test_getRegisteredDefaultItem_IntFromString ),
 			("test_getRegisteredDefaultItem_DoubleFromString", test_getRegisteredDefaultItem_DoubleFromString ),
 			("test_setValue_NSString", test_setValue_NSString ),
 			("test_setValue_String", test_setValue_String ),
 			("test_setValue_NSURL", test_setValue_NSURL ),
 			("test_setValue_URL", test_setValue_URL ),
 			("test_setValue_NSData", test_setValue_NSData ),
 			("test_setValue_Data", test_setValue_Data ),
 			("test_setValue_BoolFromString", test_setValue_BoolFromString ),
 			("test_setValue_IntFromString", test_setValue_IntFromString ),
 			("test_setValue_DoubleFromString", test_setValue_DoubleFromString ),
 			("test_volatileDomains", test_volatileDomains),
 			("test_persistentDomain", test_persistentDomain ),
 		]
 	}

 	func test_createUserDefaults() {
 		let defaults = UserDefaults.standard

 		defaults.set(4, forKey: "ourKey")
 	}

 	func test_getRegisteredDefaultItem() {
 		let defaults = UserDefaults.standard

 		defaults.register(defaults: ["key1": NSNumber(value: Int(5))])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.integer(forKey: "key1"), 5)
 	}

 	func test_getRegisteredDefaultItem_NSString() {
 		let defaults = UserDefaults.standard

 		// Register a NSString value. UserDefaults.string(forKey:) is supposed to return the NSString as a String
 		defaults.register(defaults: ["key1": "hello" as NSString])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
 	}

 	func test_getRegisteredDefaultItem_String() {
 		let defaults = UserDefaults.standard

 		// Register a String value. UserDefaults.string(forKey:) is supposed to return the String
 		defaults.register(defaults: ["key1": "hello"])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
 	}

 	func test_getRegisteredDefaultItem_NSURL() {
 		let defaults = UserDefaults.standard

 		// Register an NSURL value. UserDefaults.url(forKey:) is supposed to return the URL
 		defaults.register(defaults: ["key1": NSURL(fileURLWithPath: "/hello/world")])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
 	}

 	func test_getRegisteredDefaultItem_URL() {
 		let defaults = UserDefaults.standard

 		// Register an URL value. UserDefaults.url(forKey:) is supposed to return the URL
 		defaults.register(defaults: ["key1": URL(fileURLWithPath: "/hello/world")])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
 	}

 	func test_getRegisteredDefaultItem_NSData() {
 		let defaults = UserDefaults.standard
 		let bytes = [0, 1, 2, 3, 4] as [UInt8]

 		// Register an NSData value. UserDefaults.data(forKey:) is supposed to return the Data
 		defaults.register(defaults: ["key1": NSData(bytes: bytes, length: bytes.count)])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
 	}

 	func test_getRegisteredDefaultItem_Data() {
 		let defaults = UserDefaults.standard
 		let bytes = [0, 1, 2, 3, 4] as [UInt8]

 		// Register a Data value. UserDefaults.data(forKey:) is supposed to return the Data
 		defaults.register(defaults: ["key1": Data(bytes: bytes)])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
 	}

 	func test_getRegisteredDefaultItem_BoolFromString() {
 		let defaults = UserDefaults.standard

 		// Register a boolean default value as a string. UserDefaults.bool(forKey:) is supposed to return the parsed Bool value
 		defaults.register(defaults: ["key1": "YES"])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.bool(forKey: "key1"), true)
 	}

 	func test_getRegisteredDefaultItem_IntFromString() {
 		let defaults = UserDefaults.standard

 		// Register an int default value as a string. UserDefaults.integer(forKey:) is supposed to return the parsed Int value
 		defaults.register(defaults: ["key1": "1234"])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.integer(forKey: "key1"), 1234)
 	}

 	func test_getRegisteredDefaultItem_DoubleFromString() {
 		let defaults = UserDefaults.standard

 		// Register a double default value as a string. UserDefaults.double(forKey:) is supposed to return the parsed Double value
 		defaults.register(defaults: ["key1": "12.34"])

 		//make sure we don't have anything in the saved plist.
 		defaults.removeObject(forKey: "key1")

 		XCTAssertEqual(defaults.double(forKey: "key1"), 12.34)
 	}

 	func test_setValue_NSString() {
 		let defaults = UserDefaults.standard

 		// Set a NSString value. UserDefaults.string(forKey:) is supposed to return the NSString as a String
 		defaults.set("hello" as NSString, forKey: "key1")

 		XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
 	}

 	func test_setValue_String() {
 #if !DARWIN_COMPATIBILITY_TESTS  // Works if run on its own, hangs if all tests in class are run
 		let defaults = UserDefaults.standard

 		// Register a String value. UserDefaults.string(forKey:) is supposed to return the String
 		defaults.set("hello", forKey: "key1")

 		XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
 #endif
 	}

 	func test_setValue_NSURL() {
 		let defaults = UserDefaults.standard

 		// Set a NSURL value. UserDefaults.url(forKey:) is supposed to return the NSURL as a URL
 		defaults.set(NSURL(fileURLWithPath: "/hello/world"), forKey: "key1")

 		XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
 	}

 	func test_setValue_URL() {
 #if !DARWIN_COMPATIBILITY_TESTS  // Works if run on its own, hangs if all tests in class are run
 		let defaults = UserDefaults.standard

 		// Set a URL value. UserDefaults.url(forKey:) is supposed to return the URL
 		defaults.set(URL(fileURLWithPath: "/hello/world"), forKey: "key1")

 		XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
 #endif
 	}

 	func test_setValue_NSData() {
 		let defaults = UserDefaults.standard
 		let bytes = [0, 1, 2, 3, 4] as [UInt8]

 		// Set a NSData value. UserDefaults.data(forKey:) is supposed to return the Data
 		defaults.set(NSData(bytes: bytes, length: bytes.count), forKey: "key1")

 		XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
 	}

 	func test_setValue_Data() {
 		let defaults = UserDefaults.standard
 		let bytes = [0, 1, 2, 3, 4] as [UInt8]

 		// Set a Data value. UserDefaults.data(forKey:) is supposed to return the Data
 		defaults.set(Data(bytes: bytes), forKey: "key1")

 		XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
 	}

 	func test_setValue_BoolFromString() {
 		let defaults = UserDefaults.standard

 		// Register a boolean default value as a string. UserDefaults.bool(forKey:) is supposed to return the parsed Bool value
 		defaults.set("YES", forKey: "key1")

 		XCTAssertEqual(defaults.bool(forKey: "key1"), true)
 	}

 	func test_setValue_IntFromString() {
 		let defaults = UserDefaults.standard

 		// Register an int default value as a string. UserDefaults.integer(forKey:) is supposed to return the parsed Int value
 		defaults.set("1234", forKey: "key1")

 		XCTAssertEqual(defaults.integer(forKey: "key1"), 1234)
 	}

 	func test_setValue_DoubleFromString() {
 		let defaults = UserDefaults.standard

 		// Register a double default value as a string. UserDefaults.double(forKey:) is supposed to return the parsed Double value
 		defaults.set("12.34", forKey: "key1")

 		XCTAssertEqual(defaults.double(forKey: "key1"), 12.34)
 	}

 	func test_volatileDomains() {
 		let dateKey = "A Date",
 		stringKey = "A String",
 		arrayKey = "An Array",
 		dictionaryKey = "A Dictionary",
 		dataKey = "Some Data",
 		boolKey = "A Bool"

 		let defaultsIn: [String: Any] = [
 			dateKey: Date(),
 			stringKey: "The String",
 			arrayKey: [1, 2, 3],
 			dictionaryKey: ["Swift": "Imperative", "Haskell": "Functional", "LISP": "LISP", "Today": Date()],
 			dataKey: "The Data".data(using: .utf8)!,
 			boolKey: true
 		]

 		let domainName = "TestDomain"

 		let defaults = UserDefaults(suiteName: nil)!
 		XCTAssertFalse(defaults.volatileDomainNames.contains(domainName))

 		defaults.setVolatileDomain(defaultsIn, forName: domainName)
 		let defaultsOut = defaults.volatileDomain(forName: domainName)

 		XCTAssertEqual(defaultsIn.count, defaultsOut.count)
 		XCTAssertEqual(defaultsIn[dateKey] as! Date, defaultsOut[dateKey] as! Date)
 		XCTAssertEqual(defaultsIn[stringKey] as! String, defaultsOut[stringKey] as! String)
 		XCTAssertEqual(defaultsIn[arrayKey] as! [Int], defaultsOut[arrayKey] as! [Int])
 		XCTAssertEqual(defaultsIn[dictionaryKey] as! [String: AnyHashable], defaultsOut[dictionaryKey] as! [String: AnyHashable])
 		XCTAssertEqual(defaultsIn[dataKey] as! Data, defaultsOut[dataKey] as! Data)
 		XCTAssertEqual(defaultsIn[boolKey] as! Bool, defaultsOut[boolKey] as! Bool)
 	}

 	func test_persistentDomain() {
 		let int = (key: "An Integer", value: 1234)
 		let double = (key: "A Double", value: 5678.1234)
 		let string = (key: "A String", value: "Some string")
 		let array = (key: "An Array", value: [ 1, 2, 3, 4, "Surprise" ] as [AnyHashable])
 		let dictionary = (key: "A Dictionary", value: [ "Swift": "Imperative", "Haskell": "Functional", "LISP": "LISP", "Today": Date() ] as [String: AnyHashable])

 		let domainName = "org.swift.Foundation.TestPersistentDomainName"

 		let done = expectation(description: "All notifications have fired.")

 		var countOfFiredNotifications = 0
 		let expectedNotificationCount = 3

 		let observer = NotificationCenter.default.addObserver(forName: UserDefaults.didChangeNotification, object: nil, queue: .main) { (_) in
 			countOfFiredNotifications += 1

 			if countOfFiredNotifications == expectedNotificationCount {
 				done.fulfill()
 			} else if countOfFiredNotifications > expectedNotificationCount {
 				XCTFail("Too many UserDefaults.didChangeNotification notifications posted.")
 			}
 		}

 		let defaults1 = UserDefaults(suiteName: nil)!

 		defaults1.removePersistentDomain(forName: domainName)
 		if let domain = defaults1.persistentDomain(forName: domainName) {
 			XCTAssertEqual(domain.count, 0)
 		} // else it's nil, which is also OK.

 		let defaultsIn: [String : Any] =
 			[ int.key: int.value,
 			  double.key: double.value,
 			  string.key: string.value,
 			  array.key: array.value,
 			  dictionary.key: dictionary.value ]

 		defaults1.setPersistentDomain(defaultsIn, forName: domainName)

 		let defaults2 = UserDefaults(suiteName: nil)!
 		let returned = defaults2.persistentDomain(forName: domainName)
 		XCTAssertNotNil(returned)

 		if let returned = returned {
 			XCTAssertEqual(returned.count, defaultsIn.count)
 			XCTAssertEqual(returned[int.key] as? Int, int.value)
 			XCTAssertEqual(returned[double.key] as? Double, double.value)
 			XCTAssertEqual(returned[string.key] as? String, string.value)
 			XCTAssertEqual(returned[array.key] as? [AnyHashable], array.value)
 			XCTAssertEqual(returned[dictionary.key] as? [String: AnyHashable], dictionary.value)
 		}

 		defaults2.removePersistentDomain(forName: domainName)

 		let defaults3 = UserDefaults(suiteName: nil)!
 		if let domain = defaults3.persistentDomain(forName: domainName) {
 			XCTAssertEqual(domain.count, 0)
 		} // else it's nil, which is also OK.

 		waitForExpectations(timeout: 10)

 		NotificationCenter.default.removeObserver(observer)
 	}
 }
	// This source file is part of the Swift.org open source project
	//
	// Copyright (c) 2016 Apple Inc. and the Swift project authors
	// Licensed under Apache License v2.0 with Runtime Library Exception
	//
	// See http://swift.org/LICENSE.txt for license information
	// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
	//

	#if DEPLOYMENT_RUNTIME_OBJC \|\| os(Linux)
	import Foundation
	import XCTest
	#else
	import SwiftFoundation
	import SwiftXCTest
	#endif

	class TestUserDefaults : XCTestCase {
	static var allTests : [(String, (TestUserDefaults) -> () throws -> ())] {
	return [
	("test_createUserDefaults", test_createUserDefaults ),
	("test_getRegisteredDefaultItem", test_getRegisteredDefaultItem ),
	("test_getRegisteredDefaultItem_NSString", test_getRegisteredDefaultItem_NSString ),
	("test_getRegisteredDefaultItem_String", test_getRegisteredDefaultItem_String ),
	("test_getRegisteredDefaultItem_NSURL", test_getRegisteredDefaultItem_NSURL ),
	("test_getRegisteredDefaultItem_URL", test_getRegisteredDefaultItem_URL ),
	("test_getRegisteredDefaultItem_NSData", test_getRegisteredDefaultItem_NSData ),
	("test_getRegisteredDefaultItem_Data)", test_getRegisteredDefaultItem_Data ),
	("test_getRegisteredDefaultItem_BoolFromString", test_getRegisteredDefaultItem_BoolFromString ),
	("test_getRegisteredDefaultItem_IntFromString", test_getRegisteredDefaultItem_IntFromString ),
	("test_getRegisteredDefaultItem_DoubleFromString", test_getRegisteredDefaultItem_DoubleFromString ),
	("test_setValue_NSString", test_setValue_NSString ),
	("test_setValue_String", test_setValue_String ),
	("test_setValue_NSURL", test_setValue_NSURL ),
	("test_setValue_URL", test_setValue_URL ),
	("test_setValue_NSData", test_setValue_NSData ),
	("test_setValue_Data", test_setValue_Data ),
	("test_setValue_BoolFromString", test_setValue_BoolFromString ),
	("test_setValue_IntFromString", test_setValue_IntFromString ),
	("test_setValue_DoubleFromString", test_setValue_DoubleFromString ),
	("test_volatileDomains", test_volatileDomains),
	("test_persistentDomain", test_persistentDomain ),
	]
	}

	func test_createUserDefaults() {
	let defaults = UserDefaults.standard

	defaults.set(4, forKey: "ourKey")
	}

	func test_getRegisteredDefaultItem() {
	let defaults = UserDefaults.standard

	defaults.register(defaults: ["key1": NSNumber(value: Int(5))])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.integer(forKey: "key1"), 5)
	}

	func test_getRegisteredDefaultItem_NSString() {
	let defaults = UserDefaults.standard

	// Register a NSString value. UserDefaults.string(forKey:) is supposed to return the NSString as a String
	defaults.register(defaults: ["key1": "hello" as NSString])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
	}

	func test_getRegisteredDefaultItem_String() {
	let defaults = UserDefaults.standard

	// Register a String value. UserDefaults.string(forKey:) is supposed to return the String
	defaults.register(defaults: ["key1": "hello"])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
	}

	func test_getRegisteredDefaultItem_NSURL() {
	let defaults = UserDefaults.standard

	// Register an NSURL value. UserDefaults.url(forKey:) is supposed to return the URL
	defaults.register(defaults: ["key1": NSURL(fileURLWithPath: "/hello/world")])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
	}

	func test_getRegisteredDefaultItem_URL() {
	let defaults = UserDefaults.standard

	// Register an URL value. UserDefaults.url(forKey:) is supposed to return the URL
	defaults.register(defaults: ["key1": URL(fileURLWithPath: "/hello/world")])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
	}

	func test_getRegisteredDefaultItem_NSData() {
	let defaults = UserDefaults.standard
	let bytes = [0, 1, 2, 3, 4] as [UInt8]

	// Register an NSData value. UserDefaults.data(forKey:) is supposed to return the Data
	defaults.register(defaults: ["key1": NSData(bytes: bytes, length: bytes.count)])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
	}

	func test_getRegisteredDefaultItem_Data() {
	let defaults = UserDefaults.standard
	let bytes = [0, 1, 2, 3, 4] as [UInt8]

	// Register a Data value. UserDefaults.data(forKey:) is supposed to return the Data
	defaults.register(defaults: ["key1": Data(bytes: bytes)])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
	}

	func test_getRegisteredDefaultItem_BoolFromString() {
	let defaults = UserDefaults.standard

	// Register a boolean default value as a string. UserDefaults.bool(forKey:) is supposed to return the parsed Bool value
	defaults.register(defaults: ["key1": "YES"])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.bool(forKey: "key1"), true)
	}

	func test_getRegisteredDefaultItem_IntFromString() {
	let defaults = UserDefaults.standard

	// Register an int default value as a string. UserDefaults.integer(forKey:) is supposed to return the parsed Int value
	defaults.register(defaults: ["key1": "1234"])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.integer(forKey: "key1"), 1234)
	}

	func test_getRegisteredDefaultItem_DoubleFromString() {
	let defaults = UserDefaults.standard

	// Register a double default value as a string. UserDefaults.double(forKey:) is supposed to return the parsed Double value
	defaults.register(defaults: ["key1": "12.34"])

	//make sure we don't have anything in the saved plist.
	defaults.removeObject(forKey: "key1")

	XCTAssertEqual(defaults.double(forKey: "key1"), 12.34)
	}

	func test_setValue_NSString() {
	let defaults = UserDefaults.standard

	// Set a NSString value. UserDefaults.string(forKey:) is supposed to return the NSString as a String
	defaults.set("hello" as NSString, forKey: "key1")

	XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
	}

	func test_setValue_String() {
	#if !DARWIN_COMPATIBILITY_TESTS // Works if run on its own, hangs if all tests in class are run
	let defaults = UserDefaults.standard

	// Register a String value. UserDefaults.string(forKey:) is supposed to return the String
	defaults.set("hello", forKey: "key1")

	XCTAssertEqual(defaults.string(forKey: "key1"), "hello")
	#endif
	}

	func test_setValue_NSURL() {
	let defaults = UserDefaults.standard

	// Set a NSURL value. UserDefaults.url(forKey:) is supposed to return the NSURL as a URL
	defaults.set(NSURL(fileURLWithPath: "/hello/world"), forKey: "key1")

	XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
	}

	func test_setValue_URL() {
	#if !DARWIN_COMPATIBILITY_TESTS // Works if run on its own, hangs if all tests in class are run
	let defaults = UserDefaults.standard

	// Set a URL value. UserDefaults.url(forKey:) is supposed to return the URL
	defaults.set(URL(fileURLWithPath: "/hello/world"), forKey: "key1")

	XCTAssertEqual(defaults.url(forKey: "key1"), URL(fileURLWithPath: "/hello/world"))
	#endif
	}

	func test_setValue_NSData() {
	let defaults = UserDefaults.standard
	let bytes = [0, 1, 2, 3, 4] as [UInt8]

	// Set a NSData value. UserDefaults.data(forKey:) is supposed to return the Data
	defaults.set(NSData(bytes: bytes, length: bytes.count), forKey: "key1")

	XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
	}

	func test_setValue_Data() {
	let defaults = UserDefaults.standard
	let bytes = [0, 1, 2, 3, 4] as [UInt8]

	// Set a Data value. UserDefaults.data(forKey:) is supposed to return the Data
	defaults.set(Data(bytes: bytes), forKey: "key1")

	XCTAssertEqual(defaults.data(forKey: "key1"), Data(bytes: bytes))
	}

	func test_setValue_BoolFromString() {
	let defaults = UserDefaults.standard

	// Register a boolean default value as a string. UserDefaults.bool(forKey:) is supposed to return the parsed Bool value
	defaults.set("YES", forKey: "key1")

	XCTAssertEqual(defaults.bool(forKey: "key1"), true)
	}

	func test_setValue_IntFromString() {
	let defaults = UserDefaults.standard

	// Register an int default value as a string. UserDefaults.integer(forKey:) is supposed to return the parsed Int value
	defaults.set("1234", forKey: "key1")

	XCTAssertEqual(defaults.integer(forKey: "key1"), 1234)
	}

	func test_setValue_DoubleFromString() {
	let defaults = UserDefaults.standard

	// Register a double default value as a string. UserDefaults.double(forKey:) is supposed to return the parsed Double value
	defaults.set("12.34", forKey: "key1")

	XCTAssertEqual(defaults.double(forKey: "key1"), 12.34)
	}

	func test_volatileDomains() {
	let dateKey = "A Date",
	stringKey = "A String",
	arrayKey = "An Array",
	dictionaryKey = "A Dictionary",
	dataKey = "Some Data",
	boolKey = "A Bool"

	let defaultsIn: [String: Any] = [
	dateKey: Date(),
	stringKey: "The String",
	arrayKey: [1, 2, 3],
	dictionaryKey: ["Swift": "Imperative", "Haskell": "Functional", "LISP": "LISP", "Today": Date()],
	dataKey: "The Data".data(using: .utf8)!,
	boolKey: true
	]

	let domainName = "TestDomain"

	let defaults = UserDefaults(suiteName: nil)!
	XCTAssertFalse(defaults.volatileDomainNames.contains(domainName))

	defaults.setVolatileDomain(defaultsIn, forName: domainName)
	let defaultsOut = defaults.volatileDomain(forName: domainName)

	XCTAssertEqual(defaultsIn.count, defaultsOut.count)
	XCTAssertEqual(defaultsIn[dateKey] as! Date, defaultsOut[dateKey] as! Date)
	XCTAssertEqual(defaultsIn[stringKey] as! String, defaultsOut[stringKey] as! String)
	XCTAssertEqual(defaultsIn[arrayKey] as! [Int], defaultsOut[arrayKey] as! [Int])
	XCTAssertEqual(defaultsIn[dictionaryKey] as! [String: AnyHashable], defaultsOut[dictionaryKey] as! [String: AnyHashable])
	XCTAssertEqual(defaultsIn[dataKey] as! Data, defaultsOut[dataKey] as! Data)
	XCTAssertEqual(defaultsIn[boolKey] as! Bool, defaultsOut[boolKey] as! Bool)
	}

	func test_persistentDomain() {
	let int = (key: "An Integer", value: 1234)
	let double = (key: "A Double", value: 5678.1234)
	let string = (key: "A String", value: "Some string")
	let array = (key: "An Array", value: [ 1, 2, 3, 4, "Surprise" ] as [AnyHashable])
	let dictionary = (key: "A Dictionary", value: [ "Swift": "Imperative", "Haskell": "Functional", "LISP": "LISP", "Today": Date() ] as [String: AnyHashable])

	let domainName = "org.swift.Foundation.TestPersistentDomainName"

	let done = expectation(description: "All notifications have fired.")

	var countOfFiredNotifications = 0
	let expectedNotificationCount = 3

	let observer = NotificationCenter.default.addObserver(forName: UserDefaults.didChangeNotification, object: nil, queue: .main) { (_) in
	countOfFiredNotifications += 1

	if countOfFiredNotifications == expectedNotificationCount {
	done.fulfill()
	} else if countOfFiredNotifications > expectedNotificationCount {
	XCTFail("Too many UserDefaults.didChangeNotification notifications posted.")
	}
	}

	let defaults1 = UserDefaults(suiteName: nil)!

	defaults1.removePersistentDomain(forName: domainName)
	if let domain = defaults1.persistentDomain(forName: domainName) {
	XCTAssertEqual(domain.count, 0)
	} // else it's nil, which is also OK.

	let defaultsIn: [String : Any] =
	[ int.key: int.value,
	double.key: double.value,
	string.key: string.value,
	array.key: array.value,
	dictionary.key: dictionary.value ]

	defaults1.setPersistentDomain(defaultsIn, forName: domainName)

	let defaults2 = UserDefaults(suiteName: nil)!
	let returned = defaults2.persistentDomain(forName: domainName)
	XCTAssertNotNil(returned)

	if let returned = returned {
	XCTAssertEqual(returned.count, defaultsIn.count)
	XCTAssertEqual(returned[int.key] as? Int, int.value)
	XCTAssertEqual(returned[double.key] as? Double, double.value)
	XCTAssertEqual(returned[string.key] as? String, string.value)
	XCTAssertEqual(returned[array.key] as? [AnyHashable], array.value)
	XCTAssertEqual(returned[dictionary.key] as? [String: AnyHashable], dictionary.value)
	}

	defaults2.removePersistentDomain(forName: domainName)

	let defaults3 = UserDefaults(suiteName: nil)!
	if let domain = defaults3.persistentDomain(forName: domainName) {
	XCTAssertEqual(domain.count, 0)
	} // else it's nil, which is also OK.

	waitForExpectations(timeout: 10)

	NotificationCenter.default.removeObserver(observer)
	}
	}