Thus, relying on various needs and prerequisites, a software testing procedure might be done utilizing different QA software testing methodologies, which are either implemented manually or utilizing automated software testing tools or by executing or without executing the code.
Additionally, a software application may also be tested internally and externally utilizing Black-box and White box testing techniques individually. To get a profound knowledge into this testing method, we should begin with White Box Testing.
White box testing methodology manages the structure and internal logic of the code. It is additionally called structural, glass, open box or clear box testing. The tests are composed dependent on the white box techniques include coverage of the code composed, branches, statements, paths, and internal logic of the code etc.
With the end goal to execute white box testing techniques, the tester needs to manage the code and henceforth is expected to have knowledge of coding and logic i.e. internal working of the code. White box unit test likewise needs the tester to look into the code and discover which statement/chunk/unit of the code is breaking down.
What do you check in White Box Testing Techniques?
In the White tester box following steps are executed to test the software product code:
- Essentially, check the security holes in the code.
- Check the broken or inadequate ways in the code.
- Check the flow of structure mention in the specification document
- Check the expected output
- Check every single conditional loop in the code to check the whole functionality of the application.
- Check the line by line or Section by Section in the code and cover the 100% testing.
Above steps can be executed at each progression of the STLC i.e. Unit Testing, Integration, and System testing.
In the White Box quality assurance, the flow of the application is checked. The pre-structured test cases are executed with the assistance of input data & compare the outcome with the expected one and discovered mismatch if any means you found a bug.
Given below the various white box testing techniques:
The most imperative part in the white box testing technique is the code coverage analysis which engages a software engineering team to discover the area in a code which is unexecuted by a given set of test case consequently, helping in enhancing a software application’s quality. There are distinctive procedures which can be utilized to perform out the code coverage analysis. A portion of these are:
Statement Coverage: This method is utilized to test each conceivable statement at least once. Cantata++ is the favored tools used for white box testing when utilizing this strategy.
Decision Coverage: This incorporates testing each conceivable decision condition and other conditional loops in any event once. TCAT-PATH, supporting C, C++, and Java applications, is the go-to white test tool when this method is pursued.
Condition Coverage: This makes one-time code coverage compulsory when every one of the conditions is tested.
Decision/Condition Coverage: This is a mixed method which is implemented to test all the Decision/Condition coverage in any event once while the code is executed.
Multiple Condition Coverage: In this sort of white box testing procedure, every entry point of a system must be executed at any rate once.
Execution of white box tests:
The White box tests follow an assigned testing process, wherein every part of the product is tested altogether by the team or the test manager, to guarantee its precision and also quality. This procedure incorporates five essential steps, which are as follow:
Understanding and Evaluating Code: Making utilization of the greatest preferred standpoint of white box testing, the tester should have an in-depth understanding of the source code.
Resource Management: He should make himself known with the programming language utilized and in addition the complicated tools and unobtrusive nuances engaged with the development of the software product being tested.
Test Case Creation: Creation of tests cases for each progression, branch or path of guidance either in combinatorial form or individually.
Test Execution: Execute test cases by means of hit and trial strategies, manual testing or automation.
Test Result Generation: The last rundown is produced noting down all the preparation details and the outcomes accomplished.
- Forces test engineer to reason carefully about usage.
- Uncovers issues in “hidden” code.
- Spots the Dead Code or different issues as for best programming practices.
- Costly as one need to invest both energy and money to perform white box testing.
- Every possibility that few lines of code are missed coincidentally.
- In-depth understanding about the programming language is important to perform white box testing.
It might be concluded that the utilization of white box testing approach, for the early identification of faults in code or in identifying dead code(s), not just guarantees the higher quality and lesser complexity of the code yet additionally limits the probability of occurrence of any sudden issue or bugs at a later stage in future. Henceforth, by executing it during the early stages of the SDLC, the team of testers can guarantee ideal quality and also the effectiveness of the product.
So, if white box testing is done appropriately, at that point it will positively add to the product quality. It’s additionally useful for testers to take an interest in this testing as it can give the most “unprejudiced” feeling about the code.