methodUnderTest.m

+ (void)cancelLocalNotificationForReminder:(ReminderVO *)reminder
{
    for(UILocalNotification* notification in [UIApplication sharedApplication].scheduledLocalNotifications)
    {
        if([[notification.userInfo objectForKey:KEY_INFO_ID] isEqualToString:reminder.UUID])
        {
            [[UIApplication sharedApplication] cancelLocalNotification:notification];
            
            break;
        }
    }
}

test.m

- (void)testThat_cancelLocalNotificationForReminder_cancelsTheReminderWithAMAtchingUUID {
    
    // Assert
    NSString *testUUID = @"IMATESTREMINDERNOTIFICAITON";
    id mockReminder = OCMClassMock([ReminderVO class]);
    [[[mockReminder expect] andReturn:testUUID] UUID];
    
    id mockUserInfo = OCMClassMock([NSDictionary class]);
    id mockReminderLocalNotification = OCMClassMock([UILocalNotification class]);
    [[[mockUserInfo expect] andReturn:mockReminder] objectForKey:testUUID];
    
    [[[mockReminderLocalNotification expect] andReturn:mockUserInfo] userInfo];
    
    id mockApplication = OCMPartialMock([UIApplication sharedApplication]);
    
    NSArray *testSheduledNotifications = @[mockReminderLocalNotification];
    
    [[[mockApplication expect] andReturn:testSheduledNotifications] scheduledLocalNotifications];
    [[mockApplication expect] cancelLocalNotification:mockReminderLocalNotification];
    
    // Act
    [ReminderManagerOLD cancelLocalNotificationForReminder:mockReminderLocalNotification];
    
    // Verify
    OCMVerifyAll(mockApplication);
    OCMVerifyAll(mockReminderLocalNotification);
    [mockApplication stopMocking];
    
    
}