What are three main white box testing techniques?

White box testing techniques are methods used to test the internal structure and implementation of a software application. There are several techniques that can be used in white box testing to validate the internal structure and implementation of a software application.

Here are three main white box testing techniques:

• Statement coverage: This technique involves testing to ensure that every line of code in the software application is executed at least once. This helps to ensure that all parts of the code are being tested and that there are no untested areas that could contain defects.
• Branch coverage: This technique involves testing to ensure that every branch in the code (e.g., every if/else statement) is taken at least once. This helps to ensure that all possible paths through the code are being tested and that all parts of the code are being exercised.
• Path coverage: This technique involves testing to ensure that every possible path through the code is taken at least once. This helps to ensure that all combinations of branches and statements in the code are being tested and that all parts of the code are being exercised.

Other common white box testing techniques includes:

• Condition coverage which involves testing to ensure that every boolean condition (e.g., every expression that evaluates to true or false) is evaluated both true and false at least once.
• Loop coverage which involves testing to ensure that all loops in the code are exercised fully at least once.
• Mutation testing which involves making small, controlled changes to the code (called "mutations") and then running a set of test cases to see if the changes break the code.
• Data flow testing which involves testing to ensure that all variables in the code are used and modified in a way that is consistent with the intended design of the software.
• Control flow testing which involves testing to ensure that the control flow of the code (e.g., the order in which statements are executed) is correct and meets the specified requirements.
• Input/output testing which involves testing the input and output of the system to ensure that it is correct and meets the specified requirements.

For more information, give a read to our white box testing tutorial.