いろいろテストが面倒なときによくやるSnippet

test.m

- (void)viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
  
  
    [NSObject cancelPreviousPerformRequestsWithTarget:[SomeClass sharedInstance]];
    [[SomeClass sharedInstance] performSelector:@selector(someMethod:) withObject:someObject afterDelay:5.0];
}