Test PresentedViewController with XCTest

Question

I have method which I would like to test:

- (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];
    }
}

The test...

- (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]], @"");
}

But It not work correctly. I should have MFMailComposeViewController as presentedViewController but I have null. I don't know what to do. Please help!

Answer 1

The problem is that mockViewController is not in UIWindow hierarchy. Try:

[UIApplication sharedApplication].keyWindow.rootViewController = mockViewController;

Then you can also get rid of viewDidLoad call.