Question

我有方法，我想测试：

- (void)sendMailToContact:(Contact *)conact
{
    self.contact = conact;

    if ([self isSendingAvaiable]) {

        MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
        mailViewController.mailComposeDelegate = self;
        [mailViewController setToRecipients:@[self.contact.email]];

        [self.parentViewController presentViewController:mailViewController animated:YES completion:nil];
    }
}

测试......

- (void)testSendMailToContact_itShouldShowMFMailComposeViewController
{
    UIViewController *mockViewController = [[UIViewController alloc] init];
    [mockViewController viewDidLoad];

    MailComposer *mockMailComposer = [MailComposer sharedComposerWithController:mockViewController];

    [mockMailComposer sendMailToContact:[self mockContact]];

    XCTAssertTrue([mockViewController.presentedViewController isKindOfClass:[MFMailComposeViewController class]], @"");
}

但它无法正常工作。我应该将MFMailComposeViewController作为presentViewController，但我有null。我不知道该怎么办。请帮忙！

Answer 1

问题是mockViewController不在UIWindow层次结构中。尝试：

[UIApplication sharedApplication].keyWindow.rootViewController = mockViewController;

然后你也可以摆脱viewDidLoad电话。

Answer 2

Here's the Swift 4 solution:

let vc = UIViewController()
UIApplication.shared.keyWindow?.rootViewController = vc

In your test…

XCTAssert(vc.presentedViewController is MyCustomViewController)

Answer 3

您的测试用例包含一些问题。您正在MFMailComposeViewController展示MailComposer。因此，您应拨打presentedViewController上的mockMailComposer而不是mockViewController。

将其更改为：

- (void)testSendMailToContact_itShouldShowMFMailComposeViewController
{
    MailComposer *mockMailComposer = [MailComposer sharedComposerWithController:mockViewController];

    [mockMailComposer sendMailToContact:[self mockContact]];

    XCTAssertTrue([mockMailComposer.presentedViewController isKindOfClass:[MFMailComposeViewController class]], @"");
}

Answer 4

看起来您的测试需要2个部分（或2个单独的测试）。第一部分应确保isSendingAvaiable为NO并测试mockViewController.presentedViewController为nil。第二部分应确保isSendingAvaiable为YES并测试mockViewController.presentedViewController是否为适当的类。

当测试失败时，重要的是确定错误是在于正在测试的代码还是在测试本身。

问题可能是isSendingAvaiable是NO。

Answer 5

在测试之前将根ViewController实例添加到UIWindow，无需如上所述使用UIApplication.shared.keyWindow?.rootViewController。

let window = UIWindow()
window.rootViewController = yourRootViewController
window.makeKeyAndVisible()


XCTAssert(yourRootViewController.presentedViewController is YourModalViewController)

使用XCTest测试PresentedViewController

5 个答案: