Why is it so important for software developers to write tests

Vitalii Serdiuk
4 min readMay 13


Writing tests is often viewed as a burdensome and time-consuming task. However, tests are essential to ensure the code’s quality and save time in the long run. This article will discuss the importance of writing tests in software development, highlighting their various benefits and how they can help make your life as a developer easier.

Double-checking domain model and business logic

Writing tests help you double-check your code’s domain model and business logic. With tests, you ensure your code functions as intended and provides the expected output. This can help catch any discrepancies between the expected and actual production, allowing bugs to be easily fixed before they become more significant problems. More importantly, tests are a way to ensure that your software will continue to work as expected as it evolves.

Double-checking spelling and typos in the code

One of the enormous benefits of writing tests is that it helps you double-check spelling and typos in the code. Minor typos can easily slip through the cracks, causing complex issues to identify and resolve. By writing tests, you are ensuring that your code is free from typos and spelling errors, which can save time and improve the overall readability of your code.

Saving time

Many developers skip writing tests to save time but don’t realize that writing tests can save them time in the long run. By writing tests, you catch errors early in development, saving you hours of debugging later on. Moreover, writing tests forces you to think critically about your code, making you a better developer.

Making code more straightforward and cleaner

Tests help you make your code more straightforward and cleaner. For code to be testable, it must be structured clearly and concisely. This means that tests help ensure the code is easy to read and understand, making it more maintainable and easier to debug. Additionally, writing tests forces you to break your code into smaller, more manageable pieces, helping simplify the overall structure.

Early catching a large number of bugs

Tests help catch bugs and problems early on in the development cycle. You create an early warning system for your code when you write tests. This means that any bugs or concerns can be caught and resolved before they become more significant issues, helping to reduce the amount of time spent on debugging and improving the quality of the code.

Revealing weak sides and hidden problems in the code

With tests, you can reveal your code’s weaknesses and hidden problems. This means you can identify potential issues before they become more significant problems. Identifying these issues early can help you avoid costly mistakes, improving your code’s quality and reliability.

Helping to write high-quality documentation and user scenarios and keeping it up-to-date

Tests help you write high-quality documentation and user scenarios. Tests provide you with a clear understanding of the functionality of your code and how it should work. This means that you can use this understanding to help you develop high-quality documentation and user scenarios that are accurate and up-to-date.

Measuring progress and Reducing the amount of debugging time

Tests help you measure the progress of your development efforts and reduce the amount of debugging time required. To measure progress effectively, it is crucial to have a set of tests that provide a baseline for the expected functionality of the code. This can then be used to measure the progress of the development efforts and make adjustments accordingly. Additionally, by having tests in place, you can reduce the time spent on debugging, freeing time to focus on other aspects of the development cycle.


Writing tests is a great way to ensure code quality and quickly catch potential errors and problems. It guarantees a robust software architecture, reliable business logic, and accurate spelling and typos in the code. Tests save time and ensure developers spend less time struggling with debugging time and more productive hours creating high-quality content. Moreover, tests help track progress and create clear documentation. Therefore, writing tests certainly pays off in accuracy, speed, productivity, and efficiency, making it an invaluable tool for software development professionals.

Writing tests are an essential element of the development process. It’s not about scoring bragging rights for an excellent coverage statistic or impressing managers — it’s about writing code that minimizes potential future bugs and performs predictably. Tests protect developers from the headache of dealing with hidden bugs and having to rewrite huge swaths of code when things break. When well-written tests are combined with thorough refactoring, software quality is improved exponentially, creating a more stable and prosperous product. Taking the time to write tests builds confidence and encourages agility, so don’t let the additional effort keep you from making your development process as efficient and effective as possible. Writing tests pays off!