What should be paid attention to in black box testing

Commonly usedBlack-box testingThe methods include dividing equivalence classes, boundary value analysis, wrong speculation, causal diagrams, and determining table compositionOrthogonal experimental design, scene method.

Black-box testing, which is a test to check whether each feature works properly. In testing, the program is treated as a black box that cannot be opened, without any consideration of the program's internal structure and internal characteristics.

The test is carried out on the program interface, which only checks whether the program functions are used normally in accordance with 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.

Introduction:

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.

Black box testing is called functional testing or data testing, in the test, the software under test is regarded as a box that cannot be opened, and the test is carried out without considering the internal structure and internal characteristics of the program

1. Check whether the program functions are used normally in accordance with the requirements of the specification specification, test whether there are any omissions in each function, and test whether the performance characteristics meet the requirements.

2. Test whether the human-computer interaction is wrong and detect the data structure.

or whether the external database is accessed incorrectly, whether the program can properly input data to produce the correct output results, and maintain the integrity of external information (such as databases or files).

Black box test method, equivalence class division method, boundary value hall repentance analysis method, orthogonal experiment method, flow chart analysis method, input domain coverage method, etc.

1. Equivalence class division method

The equivalence class division method refers to dividing the set of input values of the program into several equivalence classes, which are divided into valid equivalence classes and invalid equivalence classes, and a small amount of data is selected from each class for testing.

2. Boundary value analysis method

The boundary value analysis method is a test of the boundary value of the input data, which is generally used in combination with the equivalence class partition method to design test cases according to the boundary values of each equivalence class.

3. Orthogonal experimental method

The orthogonal experimental method uses orthogonal tables to test the program, and uses fewer test cases to conduct more comprehensive tests. According to the orthogonality of the orthogonal table, an appropriate number of representative points were selected from the comprehensive test for testing.

4. Flowchart analysis

When an event is triggered, a scene is formed, and the different triggering sequences and processing results of the same event form an event stream. When testing a software, in the scenario method, the test process is a correct process implemented by the software function according to the correct event flow, that is, the basic flow, and any process with failure or defect is called the alternative flow, and the alternative flow can be derived from the basic flow or from the alternative flow.

5. Input domain coverage method.

Input domain coverage refers to a test method based on SRS combined with the equivalence class partitioning method and the boundary value analysis method, which is mainly to supplement the test cases with special values and type boundaries of the input.

1. Black box testing, also known as functional testing, is relative to white box testing, black box testing does not focus on the internal implementation logic of the software, but only tests the final function.

2. Black-box testing methods include: dynamic testing, failover and recovery testing, configuration testing, capacity testing, UI testing, data and database integrity testing, usability testing, functional testing, performance testing, automated testing, robustness testing, stability testing, scenario testing, logic testing, and random testing.