White Box vs. Black Box Testing: Which One Should I Use in QA?

White Box vs. Black Box Testing: Which One Should I Use in QA?
Techiio-author
Written by Nilima PaulJanuary 4, 2022
6 min read
Software Testing
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Techiio-author
Nilima Paul

Technology Security Analyst

In this blog post, we will discuss White Box vs. Black Box Testing who is the best.

What is White Box Testing?

White box testing is a product testing method where the application's framework and source code are tried. It includes a careful comprehension of the programming behind the application and what the normal result of each test is.

The primary focal point of white box testing is guaranteeing that an application's code is strong and secure, and that the progression of each cycle is normal and easy to use. White box testing found out about investigating a reasonable (or white) box. You'd have the option to see the inward components and how they make the cycle run.

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Advantages of White Box Testing

  • Programming expertise: testers will be able to sift through and identify problematic bits of code, saving programmers time searching for flaws.
  • Identify problems quicker: testers can utilize unit testing to test small batches of source code and locate flaws in the code much earlier in development
  • Detect security issues: some white box testers are specialized in performing multiple attacks at the project's code to expose any security risks or flaws.

Disadvantages of White Box Testing

  • Difficulty finding testers: only certain testers are capable of performing White Box testing, so resources are limited.
  • Expense: because of the limited amount of qualified testers, cost can be a negative factor for some businesses.
  • Human error: as with any other human-based testing, there is a chance that codes can be mistakenly missed.

What is Black Box Testing?

Not all projects require the quality testers to know how to code. Black box testing (also known as behavioral testing) is a software testing method that primarily works on reviewing and testing the structure, design, and implementation of the application. The test designer selects valid and invalid input and determines the correct output.

Think of it as filling out a form on a website. You should know that certain fields are required and cannot execute without content inside them. Black box testing would be like going through the form and filling out the various entry points, submitting each test to make sure all fields are correct.

Much alike how white box testing is named from the ability to "see" through the white box, black box testing is where you can't see what makes the project tick.

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Advantages of Black Box Testing

  • Quicker test case development: as the testers are only concerned with the GUI of the application, they do not need to dig into the code to identify process issues.
  • User experience: tests are performed at a user's point of view.
  • Unbiased review of project: the tester and developer are two different people. The tester does not have knowledge of the application's code, so they do not have a personal bias towards the code's functionality.

Disadvantages of Black Box Testing

  • Test paths can be missed or repeated: due to the fact the programmer and tester are two different entities, test processes can be mistakenly duplicated. There is also a chance that some paths may not be identified in testing.
  • Not all aspects of the application can be tested: due to the tester's lack of coding knowledge, some functions and features are unable to be reviewed.
  • Requires clear and concise test specifications: if the testers don't know what they need to test, they can not provide a quality project.

Different Types of QA Testing

Alongside black box and white box testing, there are easily dozens of other kinds of software quality testing options for you to consider. Depending on your project's needs, you could utilize compatibility testing, functional testing, load testing, and everything in between.

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Nilima Paul
Technology Security Analyst
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