White Box Testing is a testing technique in which software’s internal structure, design, and coding are tested to verify input-output flow and improve design, usability, and security. In white box testing, code is visible to testers, so it is also called Clear box testing, Open box testing, Transparent box testing, Code-based testing, and Glass box testing. Show
It is one of two parts of the Box Testing approach to software testing. Its counterpart, Blackbox testing, involves testing from an external or end-user perspective. On the other hand, White box testing in software engineering is based on the inner workings of an application and revolves around internal testing. The term “WhiteBox” was used because of the see-through box concept. The clear box or WhiteBox name symbolizes the ability to see through the software’s outer shell (or “box”) into its inner workings. Likewise, the “black box” in “Black Box Testing” symbolizes not being able to see the inner workings of the software so that only the end-user experience can be tested. White Box Testing VideoClick here if the video is not accessible What do you verify in White Box Testing?White box testing involves the testing of the software code for the following:
The testing can be done at system, integration, and unit levels of software development. One of the basic goals of whitebox testing is to verify a working flow for an application. It involves testing a series of predefined inputs against expected or desired outputs so that when a specific input does not result in the expected output, you
have encountered a bug. How do you perform White Box Testing?We have divided it into two basic steps to give you a simplified explanation of white box testing. This is what testers do when testing an application using the white box testing technique: STEP 1) UNDERSTAND THE SOURCE CODE The first thing a tester will often do is learn and understand the source code of the application. Since white box testing involves the testing of the inner workings of an application, the tester must be very knowledgeable in the programming languages used in the applications they are testing. Also, the testing person must be highly aware of secure coding practices. Security is often one of the primary objectives of testing software. The tester should be able to find security issues and prevent attacks from hackers and naive users who might inject malicious code into the application either knowingly or unknowingly. STEP 2) CREATE TEST CASES AND EXECUTE The second basic step to white box testing involves testing the application’s source code for proper flow and structure. One way is by writing more code to test the application’s source code. The tester will develop little tests for each process or series of processes in the application. This method requires that the tester must have intimate knowledge of the code and is often done by the developer. Other methods include Manual Testing, trial, and error testing and the use of testing tools as we will explain further on in this article. WhiteBox Testing ExampleConsider the following piece of code Printme (int a, int b) { ------------ Printme is a function int result = a+ b; If (result> 0) Print ("Positive", result) Else Print ("Negative", result) } ----------- End of the source code The goal of WhiteBox testing in software engineering is to verify all the decision branches, loops, and statements in the code. To exercise the statements in the above white box testing example, WhiteBox test cases would be
White Box Testing TechniquesA major White box testing technique is Code Coverage analysis. Code Coverage analysis eliminates gaps in a Test Case suite. It identifies areas of a program that are not exercised by a set of test cases. Once gaps are identified, you create test cases to verify untested parts of the code, thereby increasing the quality of the software product There are automated tools available to perform Code coverage analysis. Below are a few coverage analysis techniques a box tester can use: Statement Coverage:- This technique requires every possible statement in the code to be tested at least once during the testing process of software engineering. Branch Coverage – This technique checks every possible path (if-else and other conditional loops) of a software application. Apart from above, there are numerous coverage types such as Condition Coverage, Multiple Condition Coverage, Path Coverage, Function Coverage etc. Each technique has its own merits and attempts to test (cover) all parts of software code. Using Statement and Branch coverage you generally attain 80-90% code coverage which is sufficient. Following are important WhiteBox Testing Techniques:
Types of White Box TestingWhite box testing encompasses several testing types used to evaluate the usability of an application, block of code or specific software package. There are listed below —
Apart from the above, a few testing types are part of both black box and white box testing. They are listed below
White Box Testing ToolsBelow is a list of top white box testing tools.
Advantages of White Box Testing
Disadvantages of WhiteBox Testing
Conclusion:
Which of the following is a disadvantage of networking?It lacks robustness –
If a PC system's principal server separates, the whole framework would end up futile. Also, if it has a bridging device or a central linking server that fails, the entire network would also come to a standstill.
What are 5 disadvantages of a network?Disadvantages of Computer Networks. Disadvantages of Computer Networks.. Lack of data security and privacy. ... . Presence of computer viruses and malwares. ... . Lack of Independence. ... . Lack of Robustness. ... . Need an efficient handler.. What would 2 disadvantages of a network be?The major disadvantages of networking is that it can be exhausting, time-consuming, and often ineffective. To make networking beneficial, you should only network with people you know or who could be likely customers or clients.
What are the disadvantages and disadvantages of networking?Computer Network Advantages and Disadvantages Comparison Table. |