The concept and method of white box test

Readers ask questions ： What is a white box test , What are the test methods  ？

Achang replied ：

One 、 White box testing

White box testing is also called structural testing 、 Transparent box test 、 Logic driven or code based testing .

We can treat software as a transparent box , The tester must check the internal structure of the program , Start by checking the logic of the program , Get the test data .

It should be noted that , Doing white box testing requires proficiency in programming language . For example, this program uses Java Language development , Then we have to master Java Language .

Two 、 The test method

1、 White box test

Code checking 、 Static structural analysis 、 Static quality measures 、 Logical coverage 、 Basic path testing 、 Domain testing 、 Symbol test 、 Path coverage and program variation .

2、 Coverage criteria

Logical coverage 、 Loop coverage and basic path testing .

3、 Logical coverage

The ability to find errors is in order from weak to strong ： Statement override 、 Determine coverage 、 Conditional coverage 、 Determine conditional coverage 、 Conditional combination covering 、 Modify the condition to judge the coverage .

Ah Chang reads in pieces ：

Because white box testing requires a high level of programming , White box testing is usually performed by developers when doing unit testing .

Proficient in a programming language, such as Java / Python The tester , When writing automated scripts, you can check the internal logic of the program by doing white box tests .