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White-box vs Black-box Testing: A Comparison Guide

By 2 de mayo de 2022julio 26th, 2023No Comments

This implies that when the whole thing or parts of it doesn’t work out as expected, you have a bug. A software application should undergo whitebox tests throughout development, after writing, and once again following each revision. A white box test is often described in terms of Static Application Security Testing , which checks source code or binaries and provides feedback about bugs.

what is white-box test design technique

Integration testing is the second stage of the software testing process after unit testing. Integration testing is conducted to evaluate the compliance of a system or component with specified functional requirements. This step focuses on testing of control statements like loops and conditional statements to check the efficiency and accuracy for different data inputs. White box testing is a helpful way to simulate the actions of testers who have complete knowledge of the internal operations of the target system. It gives the tester complete access to the internal information of the program.


This technique is popular as many applications exhibit bugs when processing boundary values. Once the flow graph is prepared, all the paths the journey might take must be mapped for testing and framed as test cases. Once the developers update the application, the testing team retests the previously reported problem areas and checks if they have been fixed. Testing methodologies such as equivalence partitioning and boundary value analysis are used to determine sets of valid inputs and their predicted outputs.

what is white-box test design technique

It requires no changes to code and integrates easily with existing applications and DevOps processes, protecting you from both known and zero-day attacks. Testers may have a biased view of the software since they are familiar with its internal workings. Testers may focus too much on the internal workings of the software and may miss external issues.

Black Box vs White Box vs Gray Box Testing

In penetration testing, white-box testing refers to a method where a white hat hacker has full knowledge of the system being attacked. The goal of a white-box penetration test is to simulate a malicious insider who has knowledge of and possibly basic credentials for the target system. The code under test could be rewritten to implement the same functionality in a different way that invalidates the assumptions baked into the test. This could result in tests that fail unnecessarily or, in the worst case, tests that now give false positives and mask errors in the code. The white-box test never was written such that it tests the intended behavior of the code under test, but instead only such that the specific implementation does what it does. Processing involves performing risk analysis to guide whole testing process, proper test plan, execute test cases and communicate results.

  • White-box testing can start early in the testing process as UI is not required.
  • Performance testing – This type of testing measures how well an application or system performs under various conditions.
  • This is a white box test design technique that focuses on the boundaries or limits of an input domain.
  • White box testing can uncover structural problems, hidden errors and problems with specific components.
  • White-box and black-box testing can be improved through some best practices.

The path coverage approach concerns itself with the linearly independent paths present in the code. A tester maps out the code’s control flow diagram which is then used to design the tests in this technique. An in-depth understanding of the system’s internal workings serves as the cornerstone of white box testing. This enables the tester to evaluate the functioning and design of the code.

Loop testing

The developer will do the white box testing, and they will test all the five programs line by line of code to find the bug. If they found any bug in any of the programs, they will correct it. And they again have to test the system then this process contains lots of time and effort and slows down the product https://www.globalcloudteam.com/ release time. Grey box testing combines inputs from developers and testers and can result in more effective testing strategies. It reduces the overhead required to perform functional testing of a large number of user paths, focusing testers on the paths most likely to affect users or result in a defect.

Branch Coverage – This technique is running a series of tests to ensure that all branches are tested at least once. Statement Coverage – This technique is aimed at exercising all programming statements with minimal tests. Create a flow graph and identify /plot all possible paths in the flow graph.

Use Decision Table Testing

One of the software test design techniques, White Box Testing, can also be called transparent box testing. Just like its name, it is a technique in which test scenarios are designed by knowing and measuring the internal structure of the software’s code by looking through a white box. The main purpose of this method is to test the code snippets one by one and see that they can be run in a healthy way even in the smallest particle. It is tested whether the inputs determined as a result of the requirements meet the outputs in a part of the code. The testing can be done at system, integration, and unit levels of software development.

Dependencies often reflect DFT but primarily by sequences of data manipulation. By monitoring each data variable, the application confirmation takes place. This method frequently reveals issues such as variables that are declared but never used or that are utilized but never initialized. One can tackle the design flaws resulting from a mismatch between the application’s logical flow and implementation, syntax checking, and typographical correction. Writing test cases that provide comprehensive coverage of the application logic is necessary.

Black Box Techniques

Once you decide AWS Local Zones are right for your application, it’s time for deployment. Based on the above example, the tester will create a decision table with all the probable outcomes. In this example, the testing team has reduced the cases to only three, allowing all possible scenarios to be tested within a few moments. These bugs are reported to the development team, who then work on fixing them. The actual outcomes are compared against the intended outcomes, and failed test cases are classified as bugs or defects.

what is white-box test design technique

In this test design technique, the cases where the decision points are passed over each condition once are evaluated. It is done by evaluating the past and current conditions of the software. Successful transitions what is white-box test design technique and unsuccessful transitions are plotted into a diagram. It is a technique often used on embedded or electro-mechanical systems. This helps you write the set of minimum test cases that cover your code.

What are three main white-box testing techniques?

White box testing is typically used to check the functionality of a program or system from the outside in. This type of testing checks whether individual pieces of a system work as intended and doesn’t rely on any specific assumptions about how they will work together. White box testing can help you identify ways to improve your app’s user experience. By testing your app in a controlled environment, you can find ways to make your app more user friendly and intuitive. Security testing – This type of testing focuses on verifying the security of an application or system.

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