Introduction to Software Testing

Testing is an essential component in quality assurance and ensures our software, applications, and websites work as expected. For example, suppose you've built your own website and it has a few 100 businesses every day. One day an article you've published goes viral, suddenly a million people visiting your site and the website crashes. Another scenario is online forms. We've all faced situations where we fill out a form and a prompt appears telling us that we have made a mistake. For example, accidentally entering letters in space provided for credit card numbers or missing special characters and passwords. This type of data validation is even more critical, especially in the domains of banking and finance. In this article, you'll learn about testing and its importance in the software development life cycle.

What is Software Testing?

Software testing is a process of evaluating and verifying the various software applications and products in terms of performance, correctness, and completeness. It helps identify bugs, gaps in the product, defects, and missing requirements with set expectations. In the early days of computers, software developers relied heavily on debugging, a process for removing and detecting potential errors. After the 1980s, software grew in size, several different testing types and products also grew in parallel depending on the requirements. Testing was primarily done in the later stages of the software lifecycle. Now it's evolved to be integrated at the early stages as well. The efficiency of any testing type is dependent on how well-written it is. The ideal testing scenario is to have the least tests written to find the largest number of defects. While software testing is important in any scenario, the real test of the products comes when it's launched in the market; there, it's judged by stakeholders and users. We live in the Internet age, products with bugs, especially in the early stages, make consumers lose interest very quickly as many alternatives are available. This is where testing plays an important role.

Importance of Testing

Testing helps detect

• • poor designs,
• • change inefficient flow or functionality,
• • address scalability concerns,
• • and find security vulnerabilities.

Testing provides A/B testing to find the best suitable options, address compatibility with platforms and devices, provide assurance to stakeholders, and a better experience for end-users. There are a few good practices that must be followed in testing to achieve optimal results. Test code allowing reusability of tests. Tests must be traceable to the requirements set. Tests written must be purpose-driven, efficient, and allow for repeatability. These testing techniques can then follow a procedural approach according to the type of testing used. The testing lifecycle in general can be broadly described as planning, preparation, execution, and reporting. The steps involved in achieving this can include writing scripts and test cases, compiling test results, correcting defects based on them, and generating reports from our test results. You've already learned about test cases. They are general sets of actions containing steps, data, pre and post-conditions written for a specific purpose. This purpose can improve functionality, flow, and finding defects. A well-written test case eventually provides good coverage, reusability, a better user experience, reduces costs, and increases overall satisfaction.

Conclusion

As the tech industry is ever-growing, several test and categories, types, tools, and products have evolved, which are tailored to best meet the requirements of the software in question. For example, a webpage will have different testing needs than an Android-based game. Even among web pages, a social media page will differ from one, say, from financial management. Testing can be categorized by several different factors. For example, depending on the amount we know about the internal implementation, we can call it black box or white box testing. There are also many testing types using practice. These include compatibility, ad hoc, usability, and regression testing. Don't worry too much about these terms for the moment. You'll learn more about them later. For now, I just want you to know that with testing, there is no one-size-fits-all solution. When testing products, it's also important to understand when to stop. There is no application that will ever be 100 percent perfect. Otherwise, a developer may feel the product is well-tested but realize it's full of bugs and flaws as soon as it's released to the end-users. A few metrics can be established for this purpose, given that there are well-written test cases in place. These include a certain number of test cycles, passing percentage of test cases, time deadlines, and time intervals between subsequent test failures. Testing in software development can be seen as the anchor of a ship or insurance for your vehicle. You can hope that everything operates smoothly, but often it does not, and while you can aim for perfection, there is always potential for human error.