White Box Testing

What is WHITE Box Testing? Techniques, Example & Types

White Box Testing is a type of testing that takes place outside of a controlled environment.
Software testing technique in which the internal structure, design, and coding of a programme are tested to ensure that the program’s input-output flow is correct, as well as to improve the program’s design, usability, and security Because code is visible to testers during white box testing, it is also referred to as clear box testing, open box testing, transparent box testing, code-based testing, and glass box testing, among other names.

One of the two parts of the Box Testing approach to software testing is the use of regression testing. Blackbox testing, on the other hand, is concerned with testing from the perspective of an external or end-user type. White box testing, on the other hand, is used in software engineering to test the internal workings of an application and is focused on internal testing.

The term “WhiteBox” was coined in reference to the concept of a see-through box. The name “clear box” or “WhiteBox” refers to the ability to see through the software’s outer shell (or “box”) and into its internal workings, which is represented by the colour white. In the same way, the “black box” in “Black Box Testing” refers to the inability to see the inner workings of the software, allowing only the end-user experience to be examined and tested.

What do you verify in White Box Testing?

The purpose of this white box testing tutorial is to teach you about what white box testing is and how to do it.
What exactly do you check during White Box Testing?
What is the best way to conduct White Box Testing?
Exemplification of WhiteBox Testing
Techniques for Testing in a White Box
There are several different types of White Box Testing.
White Box Testing Instruments
White Box Testing Has a Number of Advantages
Advantages and Disadvantages of WhiteBox Testing
What exactly do you check during White Box Testing?
White box testing is the process of evaluating software code for the following characteristics:

How do you perform White Box Testing?

Security flaws on the inside
Paths in the coding processes that are broken or poorly structured
The flow of specific inputs through the code is described here.
Output that should be expected
Conditional loops have a number of useful properties.
Testing each statement, object, and function on an individual basis is necessary.
Testing can be carried out at various stages of software development, including the system, integration, and unit levels. One of the primary objectives of whitebox testing is to ensure that an application’s working flow is verified. It entails testing a series of predefined inputs against expected or desired outputs in order to determine whether or not a specific input results in the expected output. If a specific input does not result in the expected output, you have discovered a bug.

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What is the best way to conduct White Box Testing?
We have divided white box testing into two basic steps in order to provide you with a more straightforward explanation. When applying the white box testing technique to an application, testers will perform the following steps:

THE FIRST STEP IS TO UNDERSTAND THE SOURCE CODE.

When testing an application, one of the first things a tester will do is learn and understand the source code of the application. White box testing, which involves testing the inner workings of an application, necessitates that the tester be extremely knowledgeable in the programming languages used in the applications that they are responsible for testing. Additionally, the person conducting the testing must be well-versed in secure coding practises. Testing software for security is frequently considered to be one of the most important objectives. In order to detect and prevent attacks from hackers and naive users who might inject malicious code into the application either knowingly or unknowingly, the tester must be able to detect and prevent security issues.

Step 2: CREATE AND EXECUTE TEST CASES.

The second fundamental step in white box testing is to examine the source code of the application to ensure that it has proper flow and structure. One method is to write more code in order to test the source code of the application. The tester will create small tests for each process or series of processes in the application that he or she will be testing. This method necessitates the tester’s intimate knowledge of the code, and it is frequently performed by the programmer who is also the tester. Manual testing, trial and error testing, and the use of testing tools are some of the other methods that can be used, as we will discuss further in this article.

WhiteBox Testing is a type of testing that uses only white boxes.
Exemplification of WhiteBox Testing
Take a look at the following piece of code.
The printme (int a, int b) function is defined as follows:…………………….. Printme is a function with the parameters int result = a+ b; If (result> 0), printme is called. Print (“Positive,” result) unless otherwise specified. Print (“Negative,” result). —————- The source code has come to an end.
As a software engineer, the goal of WhiteBox testing is to verify that all of the decision branches, loops, and statements in the code are correct.

WhiteBox test cases would be used to put the statements in the preceding white box testing example to the test.

A = 1, B = 1, etc.
A = -1, B = -3, and C = -1
Techniques for Testing in a White Box
Code Coverage analysis is a widely used White box testing technique in the industry. Code Coverage analysis is used to identify and eliminate gaps in a Test Case suite. It identifies areas of a programme that have not been exercised by a set of test cases and needs to be improved. Once the gaps have been identified, you can create test cases to verify the parts of the code that have not yet been tested, thereby improving the overall quality of the software product.

Code coverage analysis can be performed automatically using a number of different tools. Some coverage analysis techniques that a box tester can employ are listed below.

Software engineering testing techniques such as statement coverage are used to ensure that every possible statement in the code is tested at least once during the testing phase of the software engineering process.

When testing a software application, branch coverage is used to ensure that it covers every possible path (including if-else and other conditional loops).

Aside from the types of coverage mentioned above, there are numerous other types of coverage, such as condition coverage, multiple condition coverage, path coverage, and function coverage, among others. Each technique has its own advantages and disadvantages, and each attempts to test (cover) every part of the software code. Using Statement and

WhiteBox Testing Example

Branch coverage, you can typically achieve 80-90 percent code coverage, which is sufficient for most applications.

The following are some of the most important WhiteBox Testing Methods:
Coverage of the Statement Coverage of the Decision Coverage of the Branch Coverage
Coverage for Pre-existing Conditions
Coverage for a Variety of Conditions
Coverage for Finite State Machines
Coverage of the Path
Control flow testing is performed.
Testing the flow of data
For additional information, please see this article. https://www.guru99.com/code-coverage.html
There are several different types of White Box Testing.
White box testing is a broad term that refers to a variety of testing types that are used to evaluate the usability of an application, a block of code, or a particular software package. There are several of them, as follows:

White Box Testing Techniques

Unit testing is frequently the first type of testing performed on a software application. Unit testing is carried out on each individual unit or block of code as it is created during the development process. The majority of unit testing is performed by the programmer. As a software developer, you write a few lines of code, a single function, or an object, and then test it to ensure that it functions properly before moving on to the next step. Unit testing aids in the early detection of the vast majority of bugs during the software development lifecycle. Bugs that are discovered during this stage are less expensive and easier to fix.
Memory Leaks are checked for: Memory leaks are one of the most common causes of applications that run slowly. When dealing with a software application that is running slowly, it is critical to have a quality assurance specialist who is experienced in detecting memory leaks.
Aside from the types of testing mentioned above, a few other types of testing are included in both black box and white box testing. They are listed in the following section.

When performing white box penetration testing, the tester or developer has complete access to the application’s source code, detailed network information, IP addresses involved, and all server information that the application is running on. White Box Penetration Testing: The goal is to attack the code from a variety of angles in order to uncover security vulnerabilities.
In white box mutation testing, the best coding techniques to use for expanding a software solution are discovered by experimenting with different variations of the code.
White Box Testing Instruments
The following is a list of the best white box testing tools available.

Types of White Box Testing

Parasoft Jtest EclEmma NUnit PyUnit HTMLUnit CppUnit Parasoft Jtest EclEmma NUnit
White Box Testing Has a Number of Advantages
Code optimization is accomplished through the discovery of hidden errors.
White box test cases are simple to automate, and can be found here.
Testing is usually more thorough because all code paths are typically covered during the process.
Even if a graphical user interface (GUI) is not available, testing can begin early in the SDLC.

Advantages of White Box Testing

White box testing can be a time-consuming and expensive endeavour.
Developers who are accustomed to running white box test cases despise it. The lack of detail in white box testing by developers can result in errors in the production environment.
It is necessary to hire professional resources who have a thorough understanding of programming and implementation to conduct white box testing.
White-box testing takes a long time, and larger programming applications require more time to thoroughly test their functionality.
Notes at the end:

Disadvantages of WhiteBox Testing

White box testing can be a difficult process to master. The complexity of the task at hand is highly dependent on the application being tested. The white box testing of a small application that performs a single simple operation could take only a few minutes, whereas the full testing of a larger programming application could take days, weeks, or even months.
As part of software testing, white box testing should be performed on a software application while it is being developed, after it has been written, and again after each modification.