Dynamic parameter association using postman

In interface testing, we often encounter the response information of the previous request as the input parameter of the next request , This is it. Dynamic parameter association ,postman How does this tool achieve dynamic parameter correlation ？

First , Add environment

secondly , Assign the data to be dynamically correlated to an environment variable

Last , Reference this variable in the latter request

1、 Add environment information

 

　　 choice Environments, Click on + Button to add a set of environments . Or click New Button , choice Environments To add a set of environments . According to the needs of actual test , Check the environment , Make it your current work environment .

2、 Assign the data to be dynamically correlated to an environment variable

　　 In the previous request Tests Tab , The data that needs to be passed to the next request , Assign to an environment variable . See attached figure .

var jsonData = JSON.parse(responseBody);  # Response to be returned responseBody Assign a value to a variable jsonData

pm.environment.set("ids0", jsonData.data.schedules[0].id);  # According to the data structure of the return response , Below it data Attribute schedules Of the first element of the list id Assign a value to a variable ids0

pm.environment.set("ids1", jsonData.data.schedules[1].id);

 

　　 After running this request , stay postman You can see this in the eye icon on the upper right 2 Environment variables and their values . It can also be in Tests Add the following code to the tab to print it to the console .

console.log(ids0）

3、 Reference this variable in the latter request

　　

　　 In the latter request , Can pass {{ids0}} The environment variable is referenced in the form of double curly braces .

After executing these two requests separately , The expected effect can be achieved .postman It also provides a method of batch execution , The following will be introduced one by one