Postman interface automation-3-tests assertion 3: get dynamic parameters and set environment variables (Interface Association)

In Chapter postman primary -3- header presets, Resolve request Headband token The problem of We mentioned using environment variables token、uid
however ,token It has a validity period , After the expiration, you have to modify the environment variable again , In this way, the interface automation is not automatic at all . So here comes the question , How to automatically set environment variables ？ Actually , This is the inevitable problem of interface automation , We will certainly encounter the problem of Interface Association . namely ： The data in the response result of the previous interface , As the input parameter of the following interface .

postman Provides the syntax for setting environment variables ：Tests A template is provided on the right , Click and it will be automatically displayed in the editing area on the left .
obtain （get）/ Set up （set）/ eliminate （clear） environment variable 、 Global variables, etc .

as follows ： If the test case is executed successfully , The interface will respond to the... In the data token、uid Add to environment variables . such , Other interfaces can directly reference these two variables .

attach ：
1、 It is recommended to set the environment variable 、 eliminate , Execute again when the use case is executed successfully , Otherwise, it is easy to confuse the environment variables .
2、 An environment variable with the same name already exists , Direct override when setting .