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Getting started with postman

2022-06-26 10:43:00 【Erlin likes meat】

Catalog

Postman The page layout

postman Basic knowledge required for interface testing

Postman Interface Association

Postman Response assertion

Postman A parameterized

Postman random number

Postman The monitor

Postman Auto generate script language

Reference material

Postman The page layout

PS： Different versions Postman The interface is slightly different , But each icon The meaning of has not changed much

Upper menu bar ：

Runner Run collection request

Add New page

Sender icon Grab api request

Wrench icon Set up

Left menu bar ：

Filter filter

History Record request , In days

Collections You can use items as sets , Easy to manage

Intermediate request bar ：

Request method ： Include get post put delete etc.

Request address ： Including the agreement 、 domain name 、 Address of the interface

Params and get Use it together

Send send and download

Save Save request

The middle part ：

Authorization： authentication

Headers： Request header

Body： Request body

Pre-request Script Request pre script

Tests : Assertion

Cookies : Management request related cookies

Lower status bar ：

Hide the left menu bar

Search for

Console—— Display output results

Last request

Change the display mode —— about 、 Switch up, down and back

postman Basic knowledge required for interface testing

Necessary conditions for interface test ：

Address of the interface
agreement
Request mode
Request header
Request parameters

Common request methods ：

GET
POST
PUT
PATCH
DELETE

Format of parameter transfer ：

Request body submission

Form submission

Collection runner How to run the test set

Select test set
Choose a test environment
Set the number of iterations iterations
Set the interval between interfaces delay
Show request log all fail
Select parameters data file

Postman Interface Association

Connection way ：

Set the environment variable
Set global variables
Tests Set a variable

Set a variable ： stay pre-request scripts in , Choose the one below set variable

Then rewrite it as needed variable_key&variable_value

Can be scripted , Set up directly ：

pm.globals.set("variable_key", "variable_value");

pm.collectionVariables.set("variable_key", "variable_value");

pm.environment.set("variable_key", "variable_value");

Global variables are used in any environment , Still no environment It's OK to use it in . But in different environments, you can only use environment variables inside your own environment , You cannot use other environment specific environment variables .

Use tests Assert setting variables ,cookies and session Return header present ,token There is a return body , Return to the message .

stay tests in , Write the following statement ：

//  Get response data json object  

var Data = pm.response.json(); 

//  Extract... From the response data token 

var test = Data.token; 

//  Set up token For environment variables  

pm.environment.set("token", test);

Postman Response assertion

postman Several ways to respond to assertions

Response body:contains string Verify whether the returned result contains a character
Response body:is equal to a string Check the return result （ Whole ） Whether it is equal to the string
Response body:JSON value check Verify whether a field value in the returned result is equal to a value
Response header:content-type header check Verify whether the response header contains a string
Response time is less than 200ms Verify that the response time is less than 200ms
Status code:code is 200 Check whether the response header contains a value

pm.test("Body matches string", function () { 

    pm.expect(pm.response.text()).to.include("string_you_want_to_search"); 

}); 

pm.test("Your test name", function () { 

    var jsonData = pm.response.json(); 

    pm.expect(jsonData.value).to.eql(100); 

}); 

pm.test("Body is correct", function () { 

    pm.response.to.have.body("response_body_string"); 

}); 

pm.test("Content-Type is present", function () { 

    pm.response.to.have.header("Content-Type"); 

}); 

pm.test("Response time is less than 200ms", function () { 

    pm.expect(pm.response.responseTime).to.be.below(200); 

}); 

pm.test("Status code is 200", function () { 

    pm.response.to.have.status(200); 

});

Postman A parameterized

Main file formats ：txt json csv

Store data as txt csv json In file , have access to runner The introduction of the file , Conduct mass testing

Be careful TXT Import format ：

The first line refers to the variable name , Then each line is the corresponding value , Use English commas in the middle

Postman random number

Using random numbers can be used in mass testing and automated testing , When transferring parameters to the same parameter that cannot be repeated , Ensure that the parameters are not repeated .