What Not to Test: The Perils of Testing the Untestable

Hey there, fellow code warriors of USask! Grab your double-double from Tim's and buckle up, because we’re diving into the chaotic world of regression testing — specifically, the dark, treacherous waters of what not to test. You might be wondering, "Why the heck should I care?" Well, my sleep-deprived friends, knowing what NOT to test can save you from a world of pain, confusion, and perhaps a few extra gray hairs. Let’s make this epic!

The Myth of the Infinite Test Coverage

Let’s start by addressing the elephant in the tunnel: test coverage. You might think that the more tests you write, the better your application will be. Sure, that sounds great in theory — like believing you can survive on just Tim's coffee and the warmth of your laptop. But in reality? It’s a trap! Just because you can test something doesn’t mean you should.

Imagine this: you’re buried in code that looks like it was written by a caffeinated squirrel on a deadline. You’re testing every getter and setter like your life depends on it. But, spoiler alert: it doesn’t. Testing every single piece of code is like trying to shovel snow during a blizzard — it’s exhausting and you won't see any actual progress.

So, What Should We Avoid Testing?

Here’s the juicy part. Let’s break down the top contenders for the “What Not to Test” Hall of Shame:

1. Third-Party Libraries
   Alright, listen up! Testing third-party libraries is like trying to build a snowman with snow that’s already melted. It’s not your code, and if it breaks, it’s not your fault! You’re not getting extra credit for testing someone else's work; you’re just wasting your precious time. Instead, rely on their documentation and community feedback. Those libraries are like the cool kids at USask — let them handle their business.

2. Code That’s Dead or Deprecated
   If your code is as outdated as your favorite flip phone, it’s time to let it go. Testing dead code is like trying to revive a long-lost meme — it’s just not worth it. Focus on what’s alive and kicking. If something isn’t being used, why are you wasting bytes on it? Take a moment, throw a virtual funeral for that code, and move on with your life.

3. Exception Handling
   Look, we all know exceptions happen. They’re as inevitable as running into your ex at a party. But testing every single exception? Nah, fam. It’s like trying to predict the weather in Saskatchewan — you might get it right once, but most of the time, you’ll just be left with a soggy sock. Instead, focus on the critical exceptions that could actually impact your users. Save your energy for the sunny days!

4. UI Tests Beyond the Basics
   UI tests can be a slippery slope, like navigating the ice rink at the Agri-Food Discovery Place. Sure, you want to ensure your buttons work, but testing every pixel on the screen isn’t gonna win you any medals. Focus on the core functionalities that drive user interaction. If the button changes color when clicked, that’s cute, but does it really need a test? Nah, let it be.

5. Temporary or Experimental Features
   You know those features that are like a half-finished essay you’re too ashamed to submit? Yeah, don’t test those. If you’re not sure it’s going to make the final cut, don’t waste your time. Testing features that may disappear faster than your last bag of ketchup chips is just setting yourself up for disappointment. Keep it fresh, kids!

Understanding the Trade-offs

Now, let’s get real for a sec. Not testing the above might sound like a dream come true, but it’s not without its trade-offs. Just like your decision to skip that 8 AM class for an extra hour of sleep, every choice has consequences. If you’re not testing certain areas, you need to be vigilant elsewhere.

• Risk Management: By avoiding unnecessary tests, you can focus on high-risk areas of your application. It’s like choosing to put your energy into studying for that midterm you forgot about instead of worrying about every little detail of your project.

• Time Efficiency: Testing takes time, and in the world of coding, time is money. Spend your time wisely, channeling your inner Steve Jobs instead of being a human test suite. A well-placed test can save you hours of debugging later.

• Team Morale: There’s nothing more soul-crushing than staring at a test suite that feels like a never-ending loop of despair. Keep your team motivated by focusing on meaningful tests that matter. You want to keep your squad excited to code, not sobbing into their laptops.

How to Decide What to Test

So, you might be wondering, "How do I decide what to test then?" Great question! It’s like deciding between a double-double and an iced capp — both have their merits, but it depends on the situation!

1. User Impact: Start with features that have a direct impact on user experience. If it’s something your users care about, it’s worth the test. If they’re not gonna notice, just let it slide.

2. Code Complexity: The more complex the code, the more you should test it. If it looks like it’s been through a blender, you might want to give it some love.

3. Frequency of Change: If a piece of code is changing all the time, it’s like that one friend who can’t decide what to wear — test it regularly. Keep it in check!

4. Business Value: Focus on the features that bring value to the business. If it’s not making money, it’s not worth your time.

Wrapping It Up with Java Wisdom

Before we close the chapter on this epic tale of testing failures, let’s throw in some Java code snippets to spice things up. Remember, the goal is to focus on high-value tests. Here’s a classic example of what to prioritize:

public class UserService {
    public User findUserById(int id) {
        // Imagine this method is a spicy meatball of complexity
        // It interacts with the database and business logic
        User user = userRepository.findById(id);
        if (user == null) {
            throw new UserNotFoundException("User not found");
        }
        return user;
    }
}

In this example, testing the findUserById method is crucial because it’s directly related to user experience. If this breaks, you might as well throw your laptop out the window. But testing the database connection or the repository logic? Nah, let’s leave that to the pros.

Final Thoughts: Go Forth and Test Wisely!

Alright, my fellow code-slingers, as you emerge from your tunnel hideouts and face the harsh realities of life (and the frigid Canadian cold), remember this: not all code is worth testing. Be strategic, be smart, and for the love of all that is caffeinated, don’t test the untestable.

Now go grab that Tim’s, share a laugh with your friends, and conquer the world of regression testing like the legends you are. You’ve got this! And if you don’t, well, at least you’ll have a good story to tell during those long, cold Prairie nights.