Black box testing and white box testing are two basic methods of software testing , Please explain their advantages and disadvantages respectively ！     

The advantages of black box testing are ： Relatively simple , You don't need to know the code and implementation inside the program ; It has nothing to do with the internal implementation of the software ;  From the user's point of view , It's easy to know which functions users will use , What problems will be encountered ; Based on software development documentation , So you can also know what functions the software implements in the document ; It is more convenient to do software automatic testing .

The disadvantages of black box testing are ： It's impossible to cover all the code , Low coverage , It's only about half of the total code 30%; The reusability of automated testing is low .

The advantages of white box testing are ： Help software testers increase code coverage , Improve the quality of your code , Find hidden in the code     Hidden problems .

The disadvantages of white box testing are ： There are many different paths for the program to run , It is not possible to test all the run paths ; Testing is based on code , You can only test if the developer is doing it right , We can't know whether the design is right or not , Some functional requirements may be missed ; When the system is huge , It's going to be very expensive to test .

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