Postman interface test practice, these five questions you must know

In our daily testing work , Interface testing is very common , Whatever test you do , function 、 Automation or performance testing , Will be more or less exposed to the interface .

Recently, many people have come to ask me ： How to test the interface test ？ What are the interface test tools ？

Let me help you analyze them one by one ：

1、 What is an interface ？

It can be simply understood as an open entrance for connection , For example, the continuity between the front end and the back end requires interfaces , The interface is also required for the link between the mobile terminal and the background . Connect the front end, back end and mobile end .

2、 What are the types of interfaces ？

There are generally two types of interfaces ：

1. Program internal interface

2. External interface of the system

External interface of the system ： For example, you need to get resources or information from other websites or servers , No one else will share the database with you , He can only give you a way they've written to get the data , You can use the method he wrote by referring to the interface provided by him , In order to achieve the purpose of data sharing .

Program internal interface ： Between methods , Interaction between modules , The interface thrown inside the program , such as bbs System , There are login modules 、 Post module and so on , If you want to post, you have to log in first , Then the two modules have to interact , It will throw out an interface , For internal system call .

3、 Classification of interfaces

1.webservice Interface

2.http api Interface

webService The interface is to go soap Agreement passed http transmission , Both request message and return message are xml Format , We use the tools to call when testing , test .

http api The interface is to go http agreement , Differentiate called methods by path , The request message is key-value Formal , The return message is usually json strand , Yes get and post Other methods , This is also the two most commonly used request methods .

json Is a generic data type , All languages know it

4、 What is interface testing ？

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 the exchange of data , Transfer and control the management process , And the mutual logical dependency between systems , This requires a certain understanding of business logic , Better positioning of data flow .

5、 How to do interface testing ？

During the test , Many scenarios require testers to test an interface , Different test schemes are designed for different types of interfaces , At this time, if there is a powerful interface testing tool , Just finish the tedious work quickly , Greatly improve work efficiency . There are many tools like ：postman、jmeter、soupUI、java+httpclient、robotframework+httplibrary etc. .

It can also be realized by interface automation , It's code implementation , The framework and UI Automation is almost , Send request to judge by assertion .

Now let me introduce you to an interface test artifact ——Postman, I hope it can help friends who want to learn interface testing ！

What is? postman？

Postman Is an interface testing tool developed by Google , Can send any type of http request , Support GET/PUT/POST/DELETE Other methods .

Postman It's very easy to use , You can fill in URL,header,body Wait, you can send a request , For testing api The interface is very convenient . I used to only support chrome The plug-in now has a separate application .

choice Postman Why ？

Final decision to use postman Conduct interface test , This tool is relatively simple to use at present , But there are still many , as follows ：

1、 It is convenient to switch different environments for interface testing , Without modifying variables or code

2、 You can use only plug-ins directly in the browser ( At present, the Google system plug-in has not been updated )

3、 You can talk to newman and jenkins Integration for automated build , It's more convenient

Postman How to do interface testing ？

postman Very powerful , It's easy to use , Say below postman How to test the interface ：

1. download postman plug-in unit ：

①Chrome Plug in installation address （ To climb over a wall ）：https://chrome.google.com/webstore/detail/postman-rest-client-packa/fhbjgbiflinjbdggehcddcbncdddomop?hl=en

② Install and download locally https://www.getpostman.com/apps, After downloading, click next to install

2.chrome Browser settings - More tools - Found... In the extender postman plug-in unit , find postman, Click the start button , open postman
3.postman Page details
4.postman Simple implementation post request

a. Fill in url

b.body Zhongtianxia parameter name and parameter value

d. Check whether the returned result data is consistent with expectations
Do interface automation testing , Can only use Postman、Jmeter These interface testing tools , Is not enough . The core is to learn the whole process of interface testing , framework design , And the most important interface design thinking mode , It's not a problem to encounter any interface problems in the future .

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