Interface test tool postman

Believed to have been used postman Tool's little partner , Yes postman It's hard to avoid love , Four words describe ： Simple, practical, generous and beautiful ！

Limited to my ability , This article is not teaching , Is only postman In use , Summarize and share the important knowledge points . So here are some scattered knowledge points .

Teamwork

Use postman When writing interface use cases , Certainly not without teamwork .postman Not using regular version management tools git/svn Version management , It's through your own Workspaces Conduct management .

1. Add team members

 Home You can also add... To the directory team Members of the , But it cannot be edited Role, Therefore, it is suggested that workspaces Add under directory . In general , Only the test team leader is Admin, Other team members are Editor.

It should be noted that ,postman The team member free version currently only allows 3 personal .

2. version control

summary

Pulling branches will not be repeated here , The reason is simple , Because the possibility of using is almost zero . After all, when writing test cases , It is almost impossible to require several people to work together to write a requirement use case .

Create a branch —— Write interface test cases —— Merging branches .

Variable scope

Use postman It must be necessary to use variables , A core knowledge point in variables is scope .

 

• Global： Available throughout the workspace

• Collection： Available throughout the request in the collection , And it has nothing to do with the environment

• Environment： Only one environment can be used at a time

• Data： From the outside csv and json file , Used to define passage Newman or Collection Runner The dataset used to run the collection . It is used for data-driven

• Local： Temporary variable , Only scope the respective script areas , namely pre/test When scripting ,local Only scope this script

    Above , Namely postman Usage of all variables provided , The importance of variable scope is self-evident ,global>collection>environment>data>local, It must be kept in mind .

It is easy to use variables in a script ,get obtain ,set to update / newly added , I won't repeat it here . Need to pay attention to ,postman yes node.js Developed , The script is also js Script , So we need to have some js Basics . for example ：response Get variables in （ from json Get the specified key Corresponding value）; Type conversion ; Function writing and promise And so on .

summary

global Avoid using , If there is a constant for the whole project, you can set it , It is recommended to use uppercase variable names ;collection Act on the set , This one is used more , This variable is generally used for data transfer between interfaces ;environment Commonly used in url Set up ;data Is used for data-driven use case execution ;local Is used for some intermediate variables during script writing .

workflow

Write use cases , It is not possible to write use cases that are limited to a single interface , The writing of scenario use cases cannot be bypassed .postman Provide setNextRequest Build the process .

 

summary

Although this knowledge point only involves a function , But it's really important . at present postman The latest version has been provided flows Visual editing , Once again, it's lower postman The threshold of entry . But it seems that because it is the first edition , Logical judgment cannot be realized ,postman There are no official tutorials , So for the time being, use setNextRequest better .

monitor

If you choose postman Interface automation , The industry generally uses newman+jenkins Solutions for , The advantages of this scheme are self-evident , Can really realize devops. and newman Simple understanding , Namely postman Command line execution script for , I won't introduce it here , After all newman Is a set of instructions , I need to recite .Postman It also comes with a set of monitoring , But it didn't work jenkins Automatic build and automatic deployment of , So it can only realize the automatic execution of use cases .

 

This free version is only available for one week 300 Time request call , Therefore, it is difficult to do interface automation at the company level without paying run Of .

summary ：

It can be used as a set of solutions to realize interface automation .

The final chapter

That's how individuals respond to postman Use summary ,postman As an interface testing tool , The humanization is excellent , The latest version has been released flows function , Reduce the user's use cost again . however postman Compared with another interface testing tool jmeter for , The disadvantages are obvious , Unable to perform performance test , After all postman Only the configuration of the number of iterations is provided , Can not be like jmeter Configure more performance parameters . Automation , Use newman+jenkins To realize interface automation , This is very mature , It is suggested that it can be popularized in the company . But I have to say , because postman The technology stack is javascript, Different from the conventional technical stack of testers python/java, So it is really popularized , There is still considerable resistance .PS：postman There is another function ,mock server, But it's not used much in practice , After all, everyone mock The usage habit is also a professional packet capturing tool fiddler/charles, So this function is not introduced here .