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Should database be used in interface test

2022-07-18 04:07:00 【InfoQ】

That's a good question , I don't think many people have considered this problem . I'll throw a brick at you , Try to answer .
First , Interface automated testing is a kind of layered testing , That means it can only measure part of the range , Is whether the request and response of the interface are normal , It can't be measured in other places , At this time, only by introducing other test methods can the test scope be completely covered , such as  ui  Testing and database testing , There are other middleware tests .
In this way , Interface automation test only cares about input and output , There is no need to use databases .
however , Reality is not so beautiful .  In research and development , We want to pass   unit testing 、 The interface test 、ui  test 、 End to end testing and other test types to ensure product quality , But in fact, many test types are missing , The most serious missing is unit testing .
For a variety of reasons , Few teams value unit testing , It also means that , The basic functions and classes called in the product are directly taught to the tester without being tested , Of course , Whether the database falls into the database , Whether the message queue is working properly , Does the cache hit , Have not passed the basic test , It directly enters the interface testing stage .
here , Your interface automation test will bear more responsibilities ,
Hand over the unfinished work of unit testing . It's like we are in a hurry to build the newly designed electric car , Test the tire separately , Separate test engine , Go to test the steering wheel alone, and don't do it , But directly pull out and run .  In addition to paying attention to the overall operation of the car , Be sure to keep an eye on it , Pay more attention to each individual component .
In theory, interface automation testing does not need database intervention , But if the database is not tested separately , This part of the work should be added to the interface test .
Database operations are divided into database search operations and database write operations . Write library operation must focus on , The database checking operation can also be properly verified when there is energy .
The above is the first scenario that requires data ： Check the database .  The second scenario in which the database may be used in the interface automation test is to obtain data ： There are some data required for interface testing that you need to get through the database , Or write it into the database by counting （ It can be cleared after running ）.
For example, when you are testing the registered interface , The back end will send a mobile verification code , You may get this verification code by checking the database , Otherwise, it will be difficult for you to take the next step .
Two scenarios for using databases ： Verify that the database and management interface depend on data , I wonder if this answer enlightens you .
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