All you want to know about interface testing is here

Q: What is the interface ？

A: The interface test : It is a kind of test to test the interface between system components

The interface mainly includes : The interface between modules in the same system / Front end and back end interfaces , The other is the docking between cross system platforms ( Internal interface , External interface )

Q: Common interface types / agreement :

A:HTTP type / agreement : adopt get or post To get data , High efficiency in data processing == Concept

Webservice type / agreement : adopt soap Protocol to get data , Compared with http Can handle more complex data types , In essence http agreement

Q: Common interface request methods :

A:（1） call terminate Method .

（2） Use subProcess Modular Popen Method .

Easy to use , The specific use , Not here .

Q: common http Status code

A:200( normal ): It means that everything is normal , To the server , And the server responded to your request normally

302( Temporary redirection ): Indicates that the requested document has been temporarily moved elsewhere , New for this document url stay location The response header gives

304( not changed ): Indicates that the version of the client cache is up to date , The client should continue to use it , For example, the front end js

403( prohibit ): The server understands the client request , But refused to deal with it , It is usually caused by the permission setting of files or directories on the server

404( Can't find ): The resource requested by the client does not exist on the server

500( Internal server error ): Server side CGI,ASP,JSP Wait for a program error

504: Overtime

Q: Interface testing principle ?

A: Simulate the client to send a request to the server , After receiving the request, the server handles the response request , And return the corresponding results to the client , A process in which the client receives the result

Q: Back end interface test once , The front end is also tested , Did you repeat the test ?

A:== Be sure to test , But what? , Functional testing doesn't need to be so detailed and careful , In case of abnormal circumstances , Just choose some common

5. Which stage of test execution does the interface test belong to ?

Q: Interface test process / step = How to do interface testing ?

A:1. Obtain interface requirements and analyze

2. Write interface test cases & Review test cases

3. Project environment deployment

4. Perform the test & Tool selection

5. Submit bug And follow up

6. It is necessary to sort out the interface test report separately ( The company will do it upon request )

Knowledge reserve :

Software testing Basics : Write use cases / Design method

Linux command

Tomcat frame

Database knowledge / Observe the data flow in the data table

Master the interface concept

Mastery of tools : browser / plug-in unit /jmeter/SoapUI Principle and specific operation steps

Analytical ability : Demand business / Log analysis

Q:get and post What's the difference between methods ?

A:get It's through url The ginseng , post Is in body data In the reference

get It is mainly used to obtain data from the server ,post Mainly used to send data

get No, post So safe

Q: How to write interface test cases ?

A: Normal call of interface . Is to enter the normal parameter value , Check that the response result information of the interface is consistent with the expectation of the interface document , Include status, code, Database data, etc ( The interface should write test cases according to the returned results of the document )

Exception verification of interface . Including the length , type , Required and other exceptions , Consider boundary values synchronously . If the type of data passed is wrong, can it be handled . for example id Whether integer is supported , What is passed is a decimal or a string ? And the passed parameter is large enough or negative , Whether the interface can handle normally .

Business rule validation . The investment interface must have sufficient balance to invest , For example, you can't invest in non competitive bidding .

Interface security verification . Sensitive information for users ( password , ID number ) To encrypt , If it's an external interface , This is especially important . ------ See if there are any other requirements , User encryption

Performance verification of interface . The time of interface processing data is also a method of testing , It involves the optimization of algorithm and code . With the help of stress testing tools loadrunner complete ---------- More or less response time 10s , Ease of use -------- Whether there are project requirements

Q: The interface test case has fewer operation steps than the function test case

A: The focus of interface testing : Yes 3 spot

Return results

Database data

Log of the server

For the Journal , Generally normal results , You don't have to see , appear bug( abnormal ) When , You must read the server log

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