测试prepareForSegue是否符合预期的方法

Question

我不确定如何在单元测试中执行segue，以便prepareForSegue运行。

尽我所能用单元测试覆盖所有内容，这就是我正在尝试的内容：

- (void)setUp {

    [super setUp];
    _mainVC = [[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]
                      instantiateViewControllerWithIdentifier:kMainVC];
    _detailsVC = [[UIStoryboard storyboardWithName:@"MainStoryboard" bundle:nil]
                      instantiateViewControllerWithIdentifier:kDetailsVC];
}

- (void)test_prepareForSegue_will_set_confNumber_on_DetailsVC {

   UIStoryboardSegue *segue = [UIStoryboardSegue segueWithIdentifier:kDetailsSegueId source:_mainVC destination:_detailsVC performHandler:^{
        // do anything here ???
    }];

    [segue perform];
    expect(_detailsVC.textFieldStr).to.equal(@"123456abc");
}

我注意到，当我放入断点时，主视图控制器中的prepareForSegue永远不会被击中。

Answer 1

DUH。

只需在正在测试的ViewController上调用prepareForSegue :)

UIStoryboardSegue *segue = [UIStoryboardSegue segueWithIdentifier:kDetailsSegueId source:_mainVC destination:_detailsVC performHandler:^{
        // do nothing here
    }];

[_mainVC prepareForSegue:segue sender:self];
expect(_detailsVC.confNumber).to.equal(@"123456abc");