Glass box testing tests the program structure i.e., testing software at the program level. Glass box testing is also known as white box testing or structure-based testing. The developers are in charge of the glass box testing. Debug mode, step in and out, test the loops and logic, test the variables, and other programming or coding are components of the software structure.

Glass box testing techniques:

The Glass box techniques are:

1. Statement coverage-This process aims at exercising all programming statements with minimal tests. By testing every of the program’s statements at least once, you can achieve 100% statement coverage. We must specify the values of the variables to obtain 100% statement coverage.
2. Branch coverage-This procedure entails executing a series of tests to ensure that each branch of the software’s programs is tested at least once. All control statements utilizing if. Else, nested if’s, switch/ select cases, loops, and so on must be tested with possible variable values to integrate both True and False conditions.
3. Path coverage-This process corresponds to testing all paths of different conditions.

Types of Glass box testing:

Glass box testing is divided into two categories: unit testing and integration testing.

Unit testing: Component testing or program testing are other terms for unit testing. Each program must be independently tested with stubs and driver programs. Integration of incorrect programs might result in software faults that influence the software’s other program components. As a result, before merging with other applications, each program component should be thoroughly tested.

Integration testing: The interfaces or links between the program are tested during integration testing.

Benefits of Glass box testing:

1. While this testing it’s not seen from the tester’s point of view, but from the developer’s point of view. The interfaces or links between the program are tested during integration testing.
2. This testing is completed manually which might be easily automated with the assistance of java and selenium tools. This makes the work of testers easy and less loaded. they’ll do several tests on the code at a faster rate. Bugs that may be used to uncover hidden flaws are brought to the developers’ attention by rigorous testing in a statement, path, and branch. They enjoy the testing, despite the fact that it is time demanding due to the testing’s rigorous nature.
3. Once the testing is completed, issues and codes which are don’t seem to be working is additionally identified easily. This helps testers in determining which developers are familiar with the code and identifying faults inside it. As a result, the issues are resolved, and the code is made to function properly within the system.
4. By this behaviour of the testing, it’s easy to understand the structure of the code and also the actions of the software application likewise because of the accuracy of the code.

 Advantages of Glass box testing:

1. It forces developers to reason carefully about implementation.
2. exposes errors in “hidden” code.
3. identifies the dead code or other issues with relevancy to best programming practices.

The disadvantages are:

1. It is expensive together possesses to spend both time and money to perform white box testing.
2. There is every possibility that a few lines of code are missed accidentally.
3. In-depth knowledge of the coding language is critical to perform white box testing.
4. In-depth knowledge about the programming language is necessary to performing white box testing.

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