单元测试不要调用viewDidAppear方法 [英] Unit tests don't call viewDidAppear method

问题描述

我正在使用Specta创建一些测试，但是我似乎无法通过此基本测试.该应用程序本身可以正常运行，但此测试无法通过.

I am using Specta to create some tests but I don't seem to be able to get this basic one to pass. The app itself works fine but this test won't pass.

ViewController

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self showLogin];
}

- (void)showLogin
{
    [self presentViewController:[ETLoginVC new] animated:NO completion:nil];
    NSLog(@"PresentedVC: %@", [self.presentedViewController class]);
}

此日志:PresentedVC: ETLoginVC

规格

#import "Specs.h"

#import "ETLoadingVC.h"
#import "ETLoginVC.h"

SpecBegin(ETLoadingVCSpec)

describe(@"ETLoadingVC", ^{
    __block ETLoadingVC *loadingVC;

    beforeEach(^{
        loadingVC = [[ETLoadingVC alloc] initWithUserDefaults:nil];
    });

    afterEach(^{
        loadingVC = nil;
    });

    describe(@"no current user present", ^{
        it(@"should have a login view controller as the presented view controller", ^{
            expect(loadingVC.presentedViewController).to.beKindOf([ETLoginVC class]);
        });
    });
});

SpecEnd

此操作失败，并显示:the actual value is nil/null

This fails with: the actual value is nil/null

我尝试致电:

[loadingVC view]

我什至已经启动了UIWindow和appDelegate，但是我无法使其正常工作.

I've even initiated a UIWindow and an appDelegate but I just can't get it working.

我的视图控制器全部用代码编写.没有情节提要或笔尖.

My view controller is all written in code. No storyboards or nibs.

更新

现在，我添加了一个NSString属性，该属性将使用即将显示的类名进行更新.然后，我在测试中检查该字符串.为了使此工作正常进行，我必须将beforeEach块更改为以下内容:

For now i've added an NSString property that gets updated with the class name that is about to be presented. I then check this string in my test. To get this working though, I had to change my beforeEach block to the following:

beforeEach(^{
    loadingVC = [[ETLoadingVC alloc] initWithUserDefaults:nil];
    [loadingVC viewDidAppear:NO];
});

尽管测试通过了，但我收到以下消息:

Although the test passes, I get the following message:

Warning: Attempt to present <ETLoginVC: 0x7fcf34961940> on <ETLoadingVC: 0x7fcf34961280> whose view is not in the window hierarchy!

我知道这是因为我在当前视图完成显示之前正在调用viewDidAppear.我没有得到的是如何测试这种更好的方法.

I get that this is because i'm calling viewDidAppear before the current view has finished appearing. What I don't get is how I can test this a better way.

即使在这个更新的beforeEach块中，我也不明白为什么loadingVC.presentedViewController仍然等于nil.

I also don't understand why loadingVC.presentedViewController still equals nil even with this updated beforeEach block.

更新2

将beforeEach更改为以下内容摆脱了警告消息，现在presentedViewController已正确设置.

Changing the beforeEach to the below got rid of the warning message and now the presentedViewController is set correctly.

beforeEach(^{
    mockUserDefaults = mock([NSUserDefaults class]);
    loadingVC = [[ETLoadingVC alloc] initWithUserDefaults:mockUserDefaults];

    window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    window.rootViewController = loadingVC;
    [window makeKeyAndVisible];

    [loadingVC viewDidAppear:NO];
});

推荐答案

将beforeEach更改为以下内容似乎可以解决我的问题.

Changing the beforeEach to the following seemed to solve my problem.

beforeEach(^{
    mockUserDefaults = mock([NSUserDefaults class]);
    loadingVC = [[ETLoadingVC alloc] initWithUserDefaults:mockUserDefaults];

    window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    window.rootViewController = loadingVC;
    [window makeKeyAndVisible];

    [loadingVC viewDidAppear:NO];
});

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