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What is White Box Testing and Black Box Testing?

Hey all,

In this Blog, I will let you know about the white and black box testing.

What is White Box Testing?

The white box testing is a code level of work and only the developer can do this work because they all have a knowledge of coding and can build the software using their coding language.

In the white box testing process, the developer can do the data designing, internal codings, structure making, and examination to verify data flow from input to output. during this process, we can improve the skills of our software and also we will make a strong environment of security.

We can say that white-box testing is a way to describe your code and make your software a Ninja technique way that’s why we are calling it white-box testing. The white box testing is a coder level of knowledge work because a technical person can do this work.

Flow Chart of White Box Testing

After seeing the structure of the White box flow you are thinking that this is very hard to understand let me explain you. think as a Manager and you have to build a software ok. so First, you have to use your internal feature which means you can use your developers. second, Choose the best one from your developer and present it to this as a leader. Third, If you have another best developer please add them to this team. Fourth, Assign the task to your developers. Fifth, make a good environment in front of your developers. Sixth, Wait for the result and after getting the result please do the verification & validation work on it.

I will give you a surety that, you will get a good response from your client.

Advantages of White Box Testing?

I am very excited to let you know the advantages of White Box testing because this is a very good process to know the software development process and also you can know the dynamic process after the completion.

Advantages –

Thoroughness – White-box testing can be comprehensive, as it will test the entire code and structure of the application and product. This is a good testing skill way to get the results faster, due to this type of testing it is identified that the structure of codes, finding bugs, errors, data flow issues, etc. And it will be very helpful to get an understanding of any application through thoroughness.

Unit Testing – I love this testing process because it is very helpful to know about all the internal & external activities of any type of application. because by using this testing process we will set a testing path for making the results good during this testing process we are doing code level testing and we can find the bug easily, and we can determine whether the application’s function is working well or not.

Optimization – This testing process will optimize whether the codes and functions are working well or not because during this testing we will plan to do step-by-step testing. Due to this test plan, we will optimize all the statuses of the applications and we will make a test case if there is any issue by using the optimized testing process. and by removing obfuscated problems that can go undetected during routine testing.

Automation – White Box testing has multiple tools for use during the testing process. By using the tool we can automate our time and effort. All the tools can help to automate white-box testing, such as unit testing frameworks and code coverage tools.

Bug detection – As we know, basically white box testing is the process of optimizing the functions and finding bugs in the application. So by using this testing skill, we can easily detect bugs and we can also find which functions are not working.

Enhances Security – Security is the most important part of any software and application without security everyone can make the most use of your application. but we have good news in white box testing and that is by following this process you can build the security service for your application or software.

Disadvantages of White Box testing

Expensive – First of all, this testing is too costly because you have to follow all the testing steps during the testing. You will make test cases at the time of testing and this testing process does not have the benefits of a large application because they have many steps to do during the testing. White-box testing necessitates competent testers who are familiar with programming, and  White-box testing must take all of these costs into account.

Time-consuming – I already told you that, by following this testing process you have to follow all the processes of that testing format and due to this, this will take you a lot of time to do the testing. This can delay the development process and increase overall project costs.

Limited focus on user experience – This testing will focus on the user experience codes and by using this you can only work on the user acceptations. And you will follow the limited steps to complete the following criteria for user acceptance.

Not for all – This testing step is mainly effective for small types of applications and the process of this testing is too cool for a small application. By following the steps of this you can build a good level of application or software.

Maintenance issues – By using this testing process, you have to do the updation on your test cases every time because during the work a manager will change the structure of the application or software, and due to this reason developers will change their codes so for that you have to also do the updation on the regular basic with your test cases.

How many types of white box testing are there?

There are three types of testing in the White Box.

  1. Unit Testing
  2. Integration Testing
  3. System Testing

Let’s understand these tests.

Unit testing – A powerful testing process for every application and software because during the unit test, we will make a test case in every step and we are doing code-level testing in every step.

Integration Testing – This is the second step of testing and by following the testing process you can determine whether the functions and features are working well or not.

System Testing – During this testing process a QA team will do end-to-end level testing that can define whether the application is ready or not the QA team will also let you know the status of your application which means if the software is ready after completing the system testing so you can go ahead with V module testing and if there is a problem during the testing QA team will update you to do this further process.

What is Black Box Testing?

This is a kind of software testing process that will be focused on assessing the functionality of a system without examining its internal code or implementation details. In the black box testing a tester will do the testing as a user, without any knowledge of the internal logic or structure. A tester does not know the internal logic and structure of the application they will do the testing with one go and that is all types of functions, works, etc in external basic.

On the other hand, we can call this type of testing blind testing because a tester does not have the code level of knowledge and internal level of knowledge they will do the testing based on the user’s expectation and they will deliver the result after checking all the functions and working ability.

Chart flow of Black Box testing.

Don’t worry I will explain all these topics in one go with very good language.

Boundry Value Analysis – It is one of the widely used case design techniques for black box testing. By doing this testing a tester will do the testing as per the value between the boundary value and the input value of an application because we will know that Boundary values are those that contain the upper and lower limit of a variable. The work of this technique to know the goal is to identify errors or defects that may occur on or near the boundaries of valid input ranges. This is a valuable technique for improving the effectiveness and efficiency of testing,

Equivalence Partitioning – Equivalence partitioning is a technique of software testing in which input data is divided into partitions of valid and invalid values, and it is a must that all partitions work the same behavior. Suppose A and B are two partitions so if “A” gives the valid input value then “B” is also will give you the valid input value For this reason we are calling it Equivalence testing and the purpose of this technique to reduce the test cases and doing good work and that’s why this testing gives value as an equivalence format.

Orthogonal Array Testing – This a working testing technique of black box testing and due to this testing technique a tester will reduce all the test cases and make only a few test cases and for that, we are calling it Array testing.

Fuzz Testing – A very unexpected bug-finding testing technique. This technique is known as fuzzing, In this technique we are providing invalid, unexpected, or random data as inputs to an Application & software program, and after entering the random inputs if the application works well that is good, and if it is not working so you have to raise a ticket to the developers and the developer will work on this. Fuzz testing can be performed manually or automatically. Manual fuzz testing involves providing invalid input data to the program by hand. This can be time-consuming and difficult to do consistently. Automatic fuzz testing involves using a fuzzing tool to generate and provide invalid input data to the program.

Graph-Based Testing – This is a graph-based testing process technique and by using this testing a tester will show the output as a graph-based technique and in this graph tester will enter the difference between inputs and outputs. It means they will enter the working accept ration and not working accept ration. This is a good methodology for determining the errors in the graph format

All Pairs Testing – This is a good friend of Black box testing and also we can call as Pairwise Testing. and by using this testing technique testers will start their testing pairwise. This technique aims to the interactions between different input parameters or variables. The primary goal is to ensure test coverage for all possible pairs of input values while minimizing the total number of test cases.

State Transition Testing – This will give you the result state-wise of an application & software under varying input. the purpose of this testing is to check the behaviors of an application to perform correctly or not. This testing technique will help you to improve the quality and reliability of software applications.

Advantages of Black Box Testing?

Advantages –

Programing language not needed – In the black box there is no need to know about the programming language because a tester will do the testing as per the system knowledge no need to do the testing on the code knowledge basic.

Early bug detections – This testing process is early required to detect the bugs, there is no need to work the application in full functionality. by using this you define the bugs early and after knowing this you can give the bugs to the development team.

focused on user testing only – During the black box testing a tester will do the testing on the basic of user requirements which means they will show him as a user and after that, they will start the testing and will only focus on the user’s requirements are fill full or not that’s it.

Development Cost – By using black box testing you can reduce the cost of a development process because they will give you a good testing result by their system knowledge.

Customer satisfaction – During the testing, the tester will give you very satisfying results because they will test your application on the high-quality basic and they will also give you a good testing result.

Do effort – A black testing process is a very hard work process to do by the tester. And by their hard work, you give a satisfactory result easily.

Disadvantages –

No prioritization of bugs – You do not have to meet the full requirements of the software because you don’t have code-based knowledge so you have to do the testing as per the system knowledge. you do not have to explain why you are not finding the bugs because you just work on your knowledge if the bugs will arise then will give it to the developers and if not then don’t have to do anything.

Detailed explanation not required – This means you have not needed to explain everything to your manager you just need to find bugs if you find then it will be good for you and if it is not then just chill you don’t need to do any explanation.

Designing test cases is challenging – As black box testing doesn’t have a clear functional specification, it creates difficulty for testers to create test cases.

Limited resources – You have limited resources to find the bugs with your testing skills because you don’t have so many tools for the testing that’s why.

Time-consuming – During the black box testing process a tester will take more time other than automation testing because they don’t have resources for the testing they will do the testing with only their knowledge.

How many types of black box testing are there?

Black Box Testing is a software testing approach that emphasizes evaluating the external behavior of a system rather than delving into its internal implementation. In this method, testers are not required to possess knowledge about the internal workings of the system, allowing for an assessment of the system’s functionality without detailed insights into its code.

Functional Testing:

Functional testing concentrates on verifying that the software’s functionalities align with specified requirements and specifications. It entails testing the system’s outputs against predetermined inputs. Testers engaged in functional testing must understand the expected functionality of the system and create test cases covering all aspects of this functionality. Various techniques, such as equivalence partitioning, boundary value analysis, and decision table testing, can be employed for effective functional testing.

Non-Functional Testing:

Non-functional testing targets aspects like performance, usability, security, and reliability of the system. It aims to ensure that the system complies with non-functional requirements and specifications. Testers conducting non-functional testing must be familiar with the non-functional requirements and formulate test cases covering all these aspects. Techniques like load testing, stress testing, and performance testing are employed in non-functional testing.

Regression Testing:

Regression testing is employed to confirm that new code changes do not introduce new defects into the system. It involves testing the system after modifications to guarantee that it still adheres to the defined requirements. Testers conducting regression testing need to be aware of the changes made to the system and generate test cases covering these changes. Techniques such as smoke testing, sanity testing, and comprehensive testing are utilized in regression testing.


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