I'm afraid I won't use the JMeter interface testing tool if I accept this practical case

One 、 brief introduction

JMeter, One 100％ Pure Java Desktop application , from Apache Organization's open source projects , It is an interface function 、 automation 、 sex Tools that can be tested . High scalability 、 Support HTTP、HTTPS、TCP、 Other protocols , You can also write your own Java Script pair Protocol extension .

Official website ：https://jmeter.apache.org

Two 、 install and configure

1、 This machine is installed jdk Environmental Science

2、 Download the compressed package on the official website , Unzip... In any directory

3、 Modify the configuration file , open Jmeter Of bin Under the table of contents jmeter.properties, modify ：

language=zh_CN
sampleresult.default.encoding=utf-8

4、 Enter into Jmeter Of bin Under the table of contents , double-click jmeter.bat start-up

3、 ... and 、Jmeter Common components

stay Jmeter in , Can pass Add different components , To achieve different functions , Common components are ：

test plan

One of the most basic components , All other components must run inside it .

Thread group

A thread group represents a group of users , It can simulate 1 One or more users , Can initiate 1 One or more requests , It can also be sent continuously n Of a second request .

Sampler

The sampler represents a request , such as HTTP request ,TCP Request etc. , By configuring the interface of the server ip、 Port number and parameters Rest , You can send data to the server , And get the response .

Assertion

An assertion is an expected result , Assertions are usually directed at a HTTP Requested , Judge HTTP Whether the return value of conforms to the rules of assertion , For example, whether it contains “success”, Whether the status code is 200 etc. . If the assertion passes ,Jmeter I think HTTP The request is successful , Otherwise, mark Mark as failure .

Monitor

The listener is Jmeter During the test , Get some running data , For example, how many requests have been sent 、 How many times , failed How many times . Specific contents of each request and response, etc .

Four 、 Write a HTTP Interface script

Open the background login page of code classmate mall seller Management , Enter the user name and password to log in , adopt fiddler, You can capture the information of the login interface ：

url：/seller/login

Request mode ：GET

Parameters ：username=mtx-001&password=e10adc3949ba59abbe56e057f20f883e&captcha=1512&uuid=c9835a40-047b- 11ec-ae8f-41d7ee6b2a89

First step ： Create thread group

Right click on the test plan , Add thread group , Keep default

The second step ： establish HTTP request

Right click on the thread group , Add sampler -HTTP Sampler , And according to the information of the interface , Fill in the agreement type 、 The server ip、 Port number 、 Request mode 、 route 、 Request parameters and other information

The third step ： Create a listener

Right click on the thread group , Add listener - View the result tree ,, Click the run button in the menu bar , In this way, you can see the request and after the interface is running Return the data

Fourth 、 Assertion

By default ,Jmeter According to whether the response status code of the interface is 200 To determine whether the interface is successful , But a lot of times ,200 It can only represent HTTP Request succeeded , But it may not be successful in business . Therefore, it is also necessary to judge the returned data of the interface . So you can use Jmeter Assert to judge the returned data .

Assertions are usually directed at a HTTP Requested , Judge HTTP Whether the return value of conforms to the rules of assertion , For example, whether it contains “success” etc. , If Assertion passed ,Jmeter I think HTTP The request is successful , Otherwise, Mark as failure , Marked in red in the view results tree .

Common assertions are Json Assertions and responses .

Json Assertion

The return for the interface is json Format data , have access to json Assertion , It can judge json Whether a value in the string is as expected .

such as , After the login interface is successful , The server will return the name of this user username and nickname

{ 
     "access_token": 
"eyJhbGciOiJIUzUxMiJ9.eyJzZWxmT3BlcmF0ZWQiOjAsInN1YiI6IkNMRVJLIiwicm9sZSI6IlNVUE VSX1NFTExFUiIsImZvdW5kZXIiOm51bGwsInJvbGVzIjpbIkJVWUVSIiwiU0VMTEVSIiwiQ0xFUksiXS wic2VsbGVyTmFtZSI6IjExMSIsImNsZXJrSWQiOjE2LCJ1dWlkIjpudWxsLCJ1aWQiOjE5NjUsInNlbG xlcklkIjo0MSwiY2xlcmtOYW1lIjoibXR4LTAwMSIsImV4cCI6MTYyOTg3MDU5OCwidXNlcm5hbWUiOi JtdHgtMDAxIn0.BEnmRfCU2nfkqMwQVajaxMP5uoUtcyoAsTHMkaK_9RoHwaxS0GNUDY- 9I048wx8LX7pmyMqWl70Q4B31dlVTHw", 
     "uid": 1965, 
     "refresh_token": 
"eyJhbGciOiJIUzUxMiJ9.eyJzZWxmT3BlcmF0ZWQiOjAsInN1YiI6IkNMRVJLIiwicm9sZSI6IlNVUE VSX1NFTExFUiIsImZvdW5kZXIiOm51bGwsInJvbGVzIjpbIkJVWUVSIiwiU0VMTEVSIiwiQ0xFUksiXS wic2VsbGVyTmFtZSI6IjExMSIsImNsZXJrSWQiOjE2LCJ1dWlkIjpudWxsLCJ1aWQiOjE5NjUsInNlbG xlcklkIjo0MSwiY2xlcmtOYW1lIjoibXR4LTAwMSIsImV4cCI6MTYyOTg3MTE5OCwidXNlcm5hbWUiOi JtdHgtMDAxIn0.54MSaFcXIuGexBeXY-79oO5_8tAHvmEvtbJ0qKUE9A5VpqKmbECahX4zcb_2XQEox- H0aIZX49P9ncRrH22Jgg", 
     "face": null, 
     "role_id": 0, 
     "founder": 1, 
     "nickname": "mtx-001", 
     "username": "mtx-001" 
}

add to json Assertion , Determine the number of messages returned by the server username Is it in line with expectations .

stay HTTP On the request , Right click to add json Assertion

explain ：

Assert JSON Path exists： Fill in Json Path expression , among $ On behalf of the entire json,$.username Namely username Corresponding value

Additionally assert value： Whether the Json Determine the value corresponding to the path expression

Expected Value： The content of expectations , Fill in your expectations

Json Path For more detailed usage, see ：https://github.com/json-path/JsonPath

Response assertion

Response assertions have a wider range of applications , As long as the returned response content is text content , Whatever the format ,HTML、Json etc. , ring It should be asserted that stay HTTP Right click on the request , Add response assertion

explain ：

Test fields ： Judge which part of the data , The default is the response content

Pattern matching rules ： Rule of judgement , The default is to include a string

Test mode ： Specific judgment content

Finally, I also sorted out some software testing learning materials , It should be very helpful for small partners learning software testing , In order to better organize each module

Need my keywords for private messages 【555】 Get it for free Note that the keywords are ：555

Full set of software test automation test teaching video

300G Download tutorial materials 【 Video tutorial +PPT+ Project source code 】

A complete set of software testing automation testing factory has been