本系列编号基本对应stanford CS193P的课程编号，可能有一两节课的误差：比如我标（1）就对应Lecture 1，但有时我做得快了就变成(1)对应lecture 1的全部和lecture 2的一部分。
正文：
本文包括三个类，PlayingCard和PlayingDeck，两个单元测试类，和两个单元测试的用到的工具类。
写完之后的感觉：只要写完view controller这个程序就能在iphone上有个用户界面可以点了，刚做出来的时候还是挺有成就感的。在看swift的电子书只看了一两章的时候我就想把这个做出来，但是没写对。
后来在网上一搜发现别人也有在做这个，而且也在问这个怎么写。然后我借鉴他贴的代码把这个写出来了。再后面把书又读了几章，才决定再次重新开始继续看这个CS193P的课程，这次总算能跟上进度了。
具体值得记录的点有：
1.每个类都可以选TargetMembership，单元测试类应该只选CardGameTest，待测类应该同时选CardGame和CardGameTest。CardGame是我的应用名字。
选对之后我就不用一直用默认提供的CardGameTests这个类了，我后面写了两个分开的单元测试类
2.PlayingCard类里，suit和rank做了合法值校验，比如rank不能大于13，suit不能取四种花色以外的值。
这点在CS193P里，OC下用的做法是重载了这两个变量的setter，我的做法是用了swift的did set功能来校验。
3.PlayingCardTests是我写来测试PlayingCard的。原CS193P的老外是不写单元测试的。但我现在主职业是做测试的，所以我写了单元测试。
思路是一点一点校验PlayingCard类提供的所有东西，包括suit和rank的默认值或最大值，单个变量成功的设置、不成功的设置时的校验、
4.PlayingCardDeckTests里我通过检查deck里所有元素来检查待测的init方法。
并且在其后做了2次抽牌，抽牌之前先记录当前卡组，做随机抽牌，抽牌之后先用正则表达式证明抽到的牌在抽牌之前在卡组中，再用正则表达式判断被抽出的牌在抽牌之后不再在卡组中。
5.DeckPrintHelper只是用来打印当前卡组中的所有牌和打印随机抽出的牌，为了减少重复代码用。Regex是我从网上找来的swift正则表达式封装好的工具类
代码：
首先是ViewController，里面只有一个IBOutlet和一个IBAction
1 //
2 // ViewController.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-6-6.
6 // Copyright (c) 2014 Ting. All rights reserved.
7 //
8
9 import UIKit
10
11 class ViewController: UIViewController {
12
13
14 @IBOutlet var flipCount : UILabel
15
16 var flipCountNum: Int = 0
17 override func viewDidLoad() {
18 super.viewDidLoad()
19 // Do any additional setup after loading the view, typically from a nib.
20 }
21
22 override func didReceiveMemoryWarning() {
23 super.didReceiveMemoryWarning()
24
25 // Dispose of any resources that can be recreated.
26 }
27
28 @IBAction func touchButton(sender : UIButton) {
29 //check the card title to know which side is upside
30 //then flip it by change the background image and title
31 if (sender.currentTitle.isEmpty){
32 sender.setTitle("A♣?", forState: UIControlState.Normal)
33 sender.setBackgroundImage(UIImage(named:"CardFront"),forState: UIControlState.Normal)
34 } else {
35 sender.setTitle("", forState: UIControlState.Normal)
36 sender.setBackgroundImage(UIImage(named:"CardBack"),forState: UIControlState.Normal)
37 }
38 //increse the flip count number
39 flipCountNum++
40 //update the flip count on screen
41 setFlipCount()
42 }
43
44 func setFlipCount(){
45 // update the flip count by reset the text of the label
46 flipCount.text = "Flips:" + String(flipCountNum)
47
48 }
49
50
51 }
然后是PlayingCard类，他是Card类的子类
1 //
2 // PlayingCard.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-18.
6 // Copyright (c) 2014 Ting. All rights reserved.
7 //
8
9 import UIKit
10
11 class PlayingCard: Card {
12 //in did set, do a check and make it can‘t set to invalid value
13 var suit: String = "?" {
14 didSet {
15 //#####could improve or not: is there a simpler way to check if an element is in an array?
16 for it in PlayingCard.valid_suits{
17 if it == suit{
18 return
19 }
20 }
21 suit = oldValue
22 }
23 }
24 //in did set, do a check and make it can‘t set to invalid value
25 var rank: Int = 0 {
26 didSet {
27 if rank > PlayingCard.max_rank{
28 rank = oldValue
29 }
30
31 }
32 }
33
34 //all valid ranks in this game,"?" means unset
35 class var rank_strings:String[] {
36 return ["?","A","2","3","4","5","6","7","8","9","10","J","Q","K"]
37 }
38
39 //define the max rank
40 class var max_rank:Int{
41 return rank_strings.count - 1
42 }
43
44 //all valid suits
45 class var valid_suits:String[]{
46 return ["♥?","♦?","♠?","♣?"]
47 }
48
49 init() {}
50
51 //just pirnt the rank and suit, and rank 11 will be rank "J",and so n
52 func contents() -> String{
53 return PlayingCard.rank_strings[self.rank]+self.suit
54 }
55
56
57 }
接着是PlayingCardDeck类，他是Deck类的子类
1 //
2 // PlayingCardDeck.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-20.
6 // Copyright (c) 2014 Ting. All rights reserved.
7 //
8
9 import UIKit
10
11 class PlayingCardDeck: Deck {
12 //just init the deck with 52 cards
13 init(){
14 super.init()
15 for suit in PlayingCard.valid_suits{
16 for (var rank = 1; rank <= PlayingCard.max_rank; rank++){
17 var card: PlayingCard = PlayingCard()
18 card.rank = rank
19 card.suit = suit
20 cards.append(card)
21 }
22 }
23
24 }
25
26 }
为了测试这两个类，写了两个单元测试：
PlayingCardTests
1 //
2 // PlayingCardTests.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-18.
6 // Copyright (c) 2014 Ting. All rights reserved.
7 //
8
9 import XCTest
10
11 class PlayingCardTests: XCTestCase {
12
13 override func setUp() {
14 super.setUp()
15 // Put setup code here. This method is called before the invocation of each test method in the class.
16 }
17
18 override func tearDown() {
19 // Put teardown code here. This method is called after the invocation of each test method in the class.
20 super.tearDown()
21 }
22
23 func testExample() {
24 // This is an example of a functional test case.
25 var p_card: PlayingCard = PlayingCard()
26
27 println(PlayingCard.valid_suits)
28 println(PlayingCard.rank_strings)
29 println(PlayingCard.max_rank)
30
31
32 XCTAssert(PlayingCard.valid_suits == ["♥?","♦?","♠?","♣?"], "Pass")
33 XCTAssert(PlayingCard.rank_strings == ["?","A","2","3","4","5","6","7","8","9","10","J","Q","K"], "Pass")
34 XCTAssert(PlayingCard.max_rank == 13, "Pass")
35
36 XCTAssert(p_card.contents == "??","Pass")
37 println(p_card.contents)
38
39 p_card.suit = "♥?"
40 p_card.rank = 11
41 println("this card:\(p_card.contents)")
42 XCTAssert(p_card.contents == "J♥?","Pass")
43
44 p_card.suit = "♀" // try to set an invalid value, it will be ignored because I do the check in didSet of the suit
45 println(p_card.contents)
46 XCTAssert(p_card.contents == "J♥?","Pass")
47
48
49 p_card.suit = "♣?"
50 println(p_card.contents)
51 XCTAssert(p_card.contents == "J♣?","Pass")
52
53 p_card.rank = 33
54 println(p_card.contents)
55 XCTAssert(p_card.contents == "J♣?","Pass")
56
57 p_card.rank = 13
58 println(p_card.contents)
59 XCTAssert(p_card.contents == "K♣?","Pass")
60
61 }
62
63 func testPerformanceExample() {
64 // This is an example of a performance test case.
65 self.measureBlock() {
66 // Put the code you want to measure the time of here.
67 }
68 }
69
70 }
PlayingCardDeckTests
1 //
2 // PlayingCardDeckTests.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-20.
6 // Copyright (c) 2014 Ting. All rights reserved.
7 //
8
9 import XCTest
10
11 class PlayingCardDeckTests: XCTestCase {
12
13 override func setUp() {
14 super.setUp()
15 // Put setup code here. This method is called before the invocation of each test method in the class.
16 }
17
18 override func tearDown() {
19 // Put teardown code here. This method is called after the invocation of each test method in the class.
20 super.tearDown()
21 }
22
23 func testExample() {
24 // This is an example of a functional test case.
25
26 //to test the init method, I create a new deck
27 var card_deck: PlayingCardDeck = PlayingCardDeck()
28
29 // the expected result
30 var expected_card_string: NSString = "A♥?,2♥?,3♥?,4♥?,5♥?,6♥?,7♥?,8♥?,9♥?,10♥?,J♥?,Q♥?,K♥?,A♦?,2♦?,3♦?,4♦?,5♦?,6♦?,7♦?,8♦?,9♦?,10♦?,J♦?,Q♦?,K♦?,A♠?,2♠?,3♠?,4♠?,5♠?,6♠?,7♠?,8♠?,9♠?,10♠?,J♠?,Q♠?,K♠?,A♣?,2♣?,3♣?,4♣?,5♣?,6♣?,7♣?,8♣?,9♣?,10♣?,J♣?,Q♣?,K♣?,"
31
32 //print and check the deck, if it has all 52 cards
33 XCTAssert( DeckPrintHelper.printDeck(card_deck) == expected_card_string,"Pass" )
34
35 //check the card number in the deck
36 XCTAssert(card_deck.cards.count == 52, "Pass")
37
38 //draw a card and check again
39 var draw_this_card = DeckPrintHelper.drawRandomCard(card_deck)
40 // Regex("K♥?").is_found_in(DeckPrintHelper.printDeck(card_deck))
41 // Regex(",").is_found_in(DeckPrintHelper.printDeck(card_deck))
42 XCTAssert( Regex(draw_this_card.contents).is_found_in(expected_card_string),"Pass" )
43 // use regex to check if still contain this card
44 var after_draw_once = DeckPrintHelper.printDeck(card_deck)
45 XCTAssert( Regex(draw_this_card.contents).is_found_in(after_draw_once) == false,"Pass" )
46 XCTAssert(card_deck.cards.count == 51, "Pass")
47
48 //do it again
49 draw_this_card = DeckPrintHelper.drawRandomCard(card_deck)
50 XCTAssert( Regex(draw_this_card.contents).is_found_in(after_draw_once),"Pass" )
51 XCTAssert( Regex(draw_this_card.contents).is_found_in(DeckPrintHelper.printDeck(card_deck)) == false,"Pass" )
52 XCTAssert(card_deck.cards.count == 50, "Pass")
53
54
55 }
56
57
58
59 func testPerformanceExample() {
60 // This is an example of a performance test case.
61 self.measureBlock() {
62 // Put the code you want to measure the time of here.
63 }
64 }
65
66 }
其中有写打印所有card的方法写在了工具类里
DeckPrintHelper
1 //
2 // DeckPrintHelper.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-20.
6 // Copyright (c) 2014 Ting. All rights reserved.
7 //
8
9 //a help class which contains some test logic for reuse
10 import UIKit
11 class DeckPrintHelper: NSObject {
12
13 // to print and return the deck string in my format
14 class func printDeck(deck: Deck) -> String{
15 var card_string: String = ""
16 println("\n_______________________________________")
17 println("Now these cards in deck")
18 for card in deck.cards{
19 card_string += ("\(card.contents),")
20 }
21 println(card_string)
22 println("_______________________________________")
23
24 return card_string
25 }
26
27 // to draw a random card while printing some comments
28 class func drawRandomCard(deck: Deck) -> Card{
29 var random_card = deck.drawRandomCard()
30 println("Now draw this random card:")
31 println(random_card.contents)
32 return random_card
33 }
34 }
还有一个正则表达式的工具类
Regex
1 //
2 // Regec.swift
3 // CardGame
4 //
5 // Created by colin.zt on 14-10-20.
6 // Copyright (c) 2014年 Ting. All rights reserved.
7 //
8
9 import Foundation
10
11 class Regex: NSObject {
12 let internalExpression: NSRegularExpression
13 let pattern: String
14
15 init(_ pattern: String) {
16 self.pattern = pattern
17 var error: NSError?
18 self.internalExpression = NSRegularExpression(pattern: pattern, options: .CaseInsensitive, error: &error)
19 }
20
21 func is_found_in(input: String) -> Bool {
22 let matches = self.internalExpression.matchesInString(input, options: nil, range:NSMakeRange(0, countElements(input)))
23 var count = matches.count
24 return matches.count > 0
25 }
26 }
27
28 //Usage Example: Regex("\\w{4}").is_found_in("abdddcd")
时间： 2024-10-09 20:28:14