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Black Box Testing

Last updated: Aug 07, 2024

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In the ever-evolving world of software development, ensuring functionality and stability is paramount. Black box testing, a cornerstone of software quality assurance (SQA), plays a vital role in achieving these goals.

This approach, also known as functional testing, evaluates software from an external perspective, focusing on its behavior without delving into the internal code structure.

Let's learn more about what does black box testing mean, its types, and its pros and cons in the following article.

What Is Black Box Testing?

Black-box testing is a testing method to analyze the functionality of a software or application. This type of testing does not require special knowledge of the program code of the application being tested.

This testing method is also known as behavioral testing which is carried out to observe the input and output results of an application. Usually, the testing is done at the final stage of application development to find out whether the application is able to function properly.

Types of Black Box Testing

There are several types of black-box testing here is the list:

1. Functional Testing

Functional testing is a method of testing that is carried out on every function or feature of an application. This test aims to ensure that the functionality of the application has been running well. Examples of functional testing are:

Smoke Test
Sanity Test
System Test
Regression Testing
Integration Testing
User Acceptance Testing

2. Non-Functional Testing

Non-functional testing is a test carried out to test any aspects outside of functional (non-functional) requirements. Non-functional testing serves to ensure the quality and performance of the developed application.

For example, a test to see if the app can run on different types of devices and screen sizes. Some types of non-functional testing are:

Usability Test
Compatibility Test
Scalability Testing
Performance Test
Load Test

Pros of Black Box Testing

Some of the advantages of this test are:

To test an application, the tester does not need to have knowledge of a particular programming language
App testers don't need to check program code
Allows testers and developers to work together independently without interfering with each other's work processes
In order to find program inconsistencies, testing is carried out from the user's point of view
Can identify program deficiencies or bugs at an early stage of testing
Effectively used for testing large and complex applications

Cons of Black Box Testing

Besides having pros, this test also has cons that you can take into consideration before choosing an application testing method:

Testers without technical knowledge of programming languages are likely to miss certain test scenarios, resulting in unidentified bugs
There is a possibility that the test is not carried out carefully because the deadline for processing is quite short
Does not allow a large and complex application testing