In software engineering, software testing is an evaluation technique used to assess a software application's functional and non-functional requirements. Testing is the process of executing a program or application to find errors.

What Is Software Testing?

Software testing is finding defects in software before it is released to the public or used in production. Software testing can do it during the development process or after the software has been removed. There are many different types of software testing, and each has its own set of benefits and drawbacks.

Post Graduate Program: Full Stack Web Development

in Collaboration with Caltech CTMEEnroll Now
Post Graduate Program: Full Stack Web Development

History of Software Testing

Although the concept of software testing dates back to the 1950s, the actual practice of software testing became common in the software industry in the late 1970s. Before that time, software was generally created by a single individual or a small team of programmers, who would also be responsible for testing their code. However, as software became more complex and was created by larger teams of programmers, it became clear that this approach to quality assurance was no longer feasible. As a result, the role of software testing emerged as a distinct profession.

Why Is Software Testing Necessary?

  • Identifies defects early - Software testing is used to determine the correctness, completeness, and quality of developed computer software. It is an empirical investigation conducted to provide stakeholders with information about the software product or service quality under test.
  • Improves product quality - Quality is a crucial factor in any product development process. By ensuring that the software is error-free, software testing helps to enhance the quality of the product. To achieve better quality, software testing should do software testing early and often in the software development process. In addition, it is essential to have a well-defined and comprehensive test plan.
  • Increases customer trust and satisfaction - Quality assurance is critical for software development companies. Achieving quality assurance means that the software development process meets the requirements, and quality assurance testing verifies that the software meets these requirements and functions as expected. Establishing and adhering to quality standards helps reduce customer anxiety about the software and builds customer trust and satisfaction.
  • Detects security vulnerabilities - As organizations increasingly rely on software to conduct business and perform critical tasks, ensuring the software is free of security vulnerabilities is more crucial than ever. Many organizations are turning to software testing to detect security vulnerabilities early in the software development process to address this need. 
  • Helps with scalability - Software testing can be very scalable when done correctly. There are a few key things to remember when scaling software testing. First, remember that you are not limited to the number of tests you can run simultaneously. Second, don't hesitate to change testing methods or tools as needed.
  • Saves money - Software testing is a process used to identify errors in software code. This process can save organizations money by identifying errors before releasing software. In some cases, software testing can also be used to improve the quality of the software code. For example, if an organization finds that a particular feature is not working correctly, it can fix the legend before the software is released.

Caltech Coding Bootcamp

Become a full stack developer in 6 monthsEnroll Now
Caltech Coding Bootcamp

Types of Software Testing

  • Integration Testing

Integration testing is a type of software testing in which individual units are combined and tested as a group. This testing aims to expose errors in the interaction between integrated teams, and integration testing is often performed after unit testing and before system testing.

  • Unit Testing

Unit testing is software testing in which individual units are tested to verify that they are fit for use. A team is the smallest testable part of an application. In object-oriented programming, a branch is usually an individual class or method. Unit testing is often performed by the programmer who writes the code.

  • Functional Testing

Functional testing is a type of software testing that verifies the functionality of the software. Proper testing checks that the software can do what it is supposed to do. It is often performed by testers who are not the programmers who wrote the code.

  • Security Testing

Security testing is essential for software development companies because it helps to protect customers and employees from potential harm. Testing should include both functional and security tests. Available tests check the software's functionality, while security tests check the software for vulnerabilities.

  • Performance Testing

Performance testing is conducted to check the system against performance requirements. It is often used to determine whether the system can handle the expected load. Performance testing can be done using various tools, such as load testing and stress testing tools. In load testing, the system is tested with an average load.

  • Regression Testing

The system is retested after changes have been made to ensure that the changes did not introduce new bugs. This is important because it can help catch errors introduced by the changes.

  • Stress Testing

Stress testing is a standard procedure used to identify potential issues with a website before they become more serious. By running stress tests, you can locate any website design and infrastructure problems that software testing may not have noticed during normal operations. Stress testing can also simulate real-world conditions, such as increased traffic or user demand.

  • Acceptance Testing

Acceptance testing is an essential step in software testing. This step helps ensure the software is correct and meets the end user's needs.

Full Stack Web Developer Course

To become an expert in MEAN StackView Course
Full Stack Web Developer Course

Phases of the Software Testing Life Cycle

The software testing life cycle has five key phases: 

  1. Acquisition
  2. Development
  3. Testing
  4. Deployment
  5. Termination

Each phase has a set of tasks that software testing must complete to ensure the software is correct and meets the end user's needs.

What Can Be Automated Within Software Testing?

Virtualization of Service

Virtualization is an emerging technology quickly gaining popularity in information technology. Virtualization is creating a virtual (software-based) version of something, such as an operating system, a server, a storage device or network resources.

Bug and Defect Tracking

Bug tracking is a software engineering process that tracks defects in software development projects. It is a part of software quality assurance and is done throughout the software development life cycle. Good bug-tracking systems help software development teams manage and resolve defects promptly and effectively.

Reporting and Metrics

Reporting and metrics are essential for ensuring that an organization makes the best use of its resources. To achieve this, it is important to have accurate data on how the organization is performing. There are several ways to gather this information, each with its benefits and drawbacks.  

Configuration Management

Configuration management ensures that all the systems in an organization are configured similarly. This ensures that all the data is stored in a consistent format and that the systems work together as intended. It is also important to verify that the systems are configured correctly in case of unforeseen changes. Any changes that are not verified can lead to problems down the line.

What Are the Benefits of Software Testing?

Software tTesting is important because it helps to identify errors, gaps or missing requirements in the newly developed software. Doing so can help to improve the quality of the software. Additionally, it can help ensure that the software meets the customer's or user's needs. Furthermore, software testing can help to improve the overall efficiency of the software development process.

Best Practices for Software Testing

Incorporate Security-Focused Testing

Security-focused testing is an important part of any software development process. By doing it, you can ensure that your software is safe and compliant with applicable regulations.

Involve Users

In software testing, it is important to involve users. There are various ways to do this, but the most effective way to get users involved in the testing process is to have them use the software in question. This allows for real-time feedback and also allows users to get a feel for how the software works. In addition, it is important to have a test plan in place so that users know what to expect and can be sure that they are testing the software properly.

Keep the Future in Mind

In software engineering, the goal is to create accurate and efficient programs. To achieve these objectives, software testing is essential. It allows us to find errors and improve the quality of the code. There are various types of software testing techniques, each with its advantages and disadvantages.

Programmers Should Avoid Writing Tests

Programmers avoid writing tests. This is because testing is often seen as a tedious process. In addition, testing can be time-consuming. However, tests are necessary to ensure the quality of the software.

Perform Thorough Reporting

One of the most important aspects of software testing is reporting. Reporting is the process of documenting and presenting test results. It is important to perform thorough reporting in software testing to ensure that all aspects of the testing process have been covered. In this way, reporting helps to improve the quality of the software testing process.

Divide Tests Into Smaller Fractions

Dividing software testing into smaller fractions can make the process more efficient while finding errors. This process, known as divide and conquer, is a common strategy used to find and correct errors in software. Testers can easily identify errors by breaking the software down into smaller pieces. In addition, this approach can also help to improve the overall quality of the software.

Use Two-Tier Test Automation

Dividing software testing into smaller fractions can make the process more efficient while finding errors. This process, known as divide and conquer, is a common strategy used to find and correct errors in software. Testers can easily identify errors by breaking the software down into smaller pieces. In addition, this approach can also help to improve the overall quality of the software.

Don’t Skip Regression Testing

Regression testing is an important process in software testing. This process helps to identify errors that regression testing: may have introduced during the development process. Running the software through a series of tests makes it possible to find and fix errors that would otherwise go undetected. In addition, regression testing can also help to improve the overall quality of the software.

If you're eager to gain the skills required to work in a challenging, rewarding, and dynamic IT role - we've got your back! Discover the endless opportunities through this innovative Post Graduate Program in Full Stack Web Development course designed by our partners at Caltech CTME. Enroll today!


Hope this article was able to give you a better understanding about software testing and the different types of testing. If you are interested in further enhancing your software testing skills, we would recommend you check Simplilearn’s Post Graduate Program in Full Stack Web Development. This course, designed in collaboration with Caltech CTME, can give you the opportunity to hone the relevant skills and become job-ready.

If you have any questions or queries, feel free to post them in the comments section below. Our team will review and get back to you at the earliest.

About the Author


Simplilearn is one of the world’s leading providers of online training for Digital Marketing, Cloud Computing, Project Management, Data Science, IT, Software Development, and many other emerging technologies.

View More
  • Disclaimer
  • PMP, PMI, PMBOK, CAPM, PgMP, PfMP, ACP, PBA, RMP, SP, and OPM3 are registered marks of the Project Management Institute, Inc.