What is black box testing? What is black box testing?

Black-box testing, also known as functional testing or data-driven testing, is the testing of a known product to determine whether each feature is valid.

can be used normally, during the test, the program is regarded as a black basin that cannot be opened, without considering the internal structure and internal characteristics of the program.

In this case, the tester performs the test in the program interface, which only checks whether the program functions are used normally in accordance with the requirements specification specification.

Whether the input data saw can be properly received to produce the correct output information, and the integrity of external information such as databases or files is maintained.

Black-box testing methods mainly include equivalence class division, boundary value analysis, cause-and-effect diagram, error speculation, etc., which are mainly used for software validation testing. "Black box".

The method focuses on the external structure of the program, regardless of the internal logical structure, and tests the software interface and software functionality. The "black box" method is a desperate way to lose.

In the test, all errors in the program can only be detected in this way by using all possible inputs as test situations. Actual test.

There are an infinite number of test cases, and one has to test not only all the valid inputs, but also the ones that are not legal but may be.

Black box testing, also known as functional testing, is a test to check whether each feature works properly. In the test, the program is regarded as a black box that cannot be opened, and the test is carried out on the program interface without considering the internal structure and internal characteristics of the program, which only checks whether the program functions are used normally in accordance with the provisions of the requirements specification, and whether the program can properly receive the input data and produce the correct output information. Black-box testing focuses on the external structure of the program, regardless of the internal logical structure, and mainly focuses on the software interface and software functions.

Black-box testing, white-box testing, electronic terminology. A black box test is an experiment done without knowing the components of an electrical appliance.

Black-box testing is a test to check whether each feature works properly. In the test, the program is regarded as a black box that cannot be opened, and the internal structure and internal characteristics of the program are tested at the program interface without considering the internal structure and internal characteristics of the program, and whether the program functions can be opened and used normally in accordance with the design requirements and the provisions of the manual. Therefore, black box testing is also called functional testing.

The black box test is conducted from the user's point of view, starting from the correspondence between the input data and the output data. Obviously, if the external characteristics themselves are designed to be faulty or the specifications are incorrectly specified, they cannot be detected by the black box testing method.

With this test method, the test engineer treats the test object as a black box, completely ignoring the internal logical structure and internal characteristics of the program, and only checks whether the functions of the program conform to its functional description according to the requirements specification of the program. The test engineer does not need to understand the internal structure of the program**, and completely simulates the end user of the software product to use the software and check whether the software product meets the user's needs.

Advantages of black-box testing: suitable for functional testing, usability testing and acceptability testing; Test the function of the program against the manual; It can test the working logic of long, complex programs and is easy to understand.

Disadvantages of black-box testing: It is not possible to conduct a complete and error-free input test, and there are some software bugs or artificially set faults that cannot be detected by black-box testing.