Day18 - basis of interface testing

Concept of interface test

• Interface test is a test to test the interface between system components
• The interface test is mainly used to detect the interaction points between the external system and the system as well as between the internal subsystems . The focus of the test is to check the exchange of data , Transfer and control the management process , And the mutual logical dependence between systems .
• The interface call inside the system is equivalent to function call , Most of the interfaces outside the system are based on HTTP Protocol to call .

Advantages of interface testing

• Compare with UI test , Can find problems earlier
• Compare with UI test , Can find the underlying problems
• Compare with UI test , Discovery and resolution are more efficient

Interface design documentation

The interface design document mainly includes the following parts ：

• Interface specification
• Request mode
• request URL
• Request parameters
• Return the data
• Return to example

Interface test case design

The focus of interface testing is mainly on request and response . In addition, it also includes the security of the interface 、 Interface performance, etc . Common use case designs have equivalence classes 、 Boundary value method, etc .

The design of general test cases mainly ranges from the verification of single interface parameters to the verification of the whole business function point , You can also verify some security and exceptions .

Summary of interface test points ：

1. Check whether the data returned by the interface is consistent with the expected result .
2. The interface test result inspection usually needs to pass SQL Statement to query and confirm from the database .
3. Check the fault tolerance of the interface , If the type of data passed is wrong, can it be handled .
4. Boundary values of interface parameters . for example , When the parameter passed is large enough or negative , Whether the interface can handle normally .
5. Interface performance ,http The request interface is mostly related to the back end execution SQL Sentence performance 、 Algorithm and so on .
6. Interface security , The interface of external calls is particularly important , Generally, each interface should be authenticated .