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Black Box Testing

Last updated: Aug 25, 2023

Black Box Testing
Cover image: Illustration of Black Box Testing which is a method to analyze the functionality of a software or application. Learn the brief information in this 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:

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

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

Black Box Testing vs White Box Testing

There are at least three differences that distinguish the two testing methods. Here is a list of the differences:

  • Technical Knowledge - in black-box testing, the tester does not need to have knowledge of the internal structure or program code, while in white-box testing it is necessary.
  • Testers - black box testing is carried out by software testers, while white box testing is carried out by software developers.
  • Testing Objectives - black-box testing serves to test the program's functionality, and white-box testing serves to see the suitability between the internal structure of the application and the software requirements.

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