Implementation and design of JMeter interface test database assertion for CSDN salary increase technology

Preface ： 

Most interface tests use the response value of the interface as the basis for interface verification , However, in the interface interacting with the database, this result judgment is not enough to judge the correctness of the interface , This article will be jmeter As a tool for interface testing to implement the database assertion of the interface

【 The end of the article leaves a lot of benefits for everyone 】

 

One 、 Overview of the general idea

• Use jmeter Initiate interface request
• Use json The extractor obtains the key content in the interface response result
• Use jmeter Initiate database operation , Get the value of the database
• Use BeanShell Assertion , Realize the comparison between interface response content and database content

Two 、jmeter Initiate interface request

Take the search interface for example , Business requirements are ： Search for products through keywords . The interface information is as follows ：

Interface information ：

Input parameters ：

Return results ： 

According to the above interface information, in jmeter Add http request , Here's the picture

3、 ... and 、 Add... For interface request json Extractor

add to json The extractor is to get all the data in the interface response name, Used to compare with... Found in the database name Compare the values one by one

1. add to json Extractor

Check search request -- add to -- Post Processors --json Extractor

2. Set up json Extractor

Explanation of various parameters ：

1. Names of created variables： Express json The variables stored in the content obtained by the extractor from the response , Any definition, as long as there is no conflict , Suggest a meaningful name , Don't write as abc Meaningless names

2. JSON Path Expressions：json Extracted expression , Indicates that you need to match the content from the response according to this rule , The expression in the figure represents all... In the matching response name The value corresponding to the field

3. Match No. (0 for Random)： The strategy of storing the matching results into variables , The default is to write nothing 0

• 0 Represents a random variable stored in , For example, we matched multiple name Value of field , Then one of them will be randomly     The value assigned to Names of created variables The specified variable
• -1 Indicates that a numeric suffix is used to identify each matching result , For example, we matched multiple name Value of field , Then eventually each result will correspond to a variable , The variable name is name_1、name_2、name_3、name_4 ....
• X Indicates that the value of the first few matches is assigned to Names of created variables The specified variable , For example, write a 2, Then it will match the second 2 Of name The value of the field is assigned to name
• Compute concatenation var： Indicates that if multiple values are matched , You can store multiple values in one variable , A variable called Names of created variables The specified variable name plus _ALL, For example, in the current figure is name_ALL, Store multiple values in , Division
• Default Values： Said if json The expression did not match any value , So what is the default value of the variable

Four 、 The configuration database initiates a database request

With mysql Database, for example

1、 Configure database connection components

Required to configure the database jar package , download mysql-connector-java.5.1.46.jar, Can be directly in maven Download from , Download address <a href="https://mvnrepository.com/artifact/mysql/mysql-connector-java/5.1.46" h"="">https://mvnrepository.com/artifact/mysql/mysql-connector-java/5.1.46

After downloading, put jmeter In the catalog lib/ext Under the table of contents , And then restart jmeter

To configure jdbc Components , Select thread group -- add to -- The configuration element --JDBC  Connection  Configuration

The meaning of the core field

• Variable Name for created pool： Indicates the name of the connection configuration , This name will be used later jdbc Use... In request
• Dabase URL： Indicates the connection address of the database instance
• JDBC Driver class： Represents the connection driver class
• Username： Indicates the user name of the database instance
• Password： Indicates the password to connect to the database instance

2、 Database request , Please note that the request needs to be placed before the query interface request

Select thread group -- add to -- Sampler --JDBC Request

The meaning of the core field

• Variable Name of Pool declared in JDBC Connect Configuration： Indicates the name of the database configuration to be connected , Consistent with our configuration above
• Query： Fill in sql sentence , Here we are looking up the commodity table , adopt name Field fuzzy query , And only returned name Field
• Result variable name： Indicates which variable the content found in the database is stored in , Write the variable name here

5、 ... and 、 Script debugging

1. Add debug sampler , Used to check whether the value of each variable is correct

Select thread group -- add to -- Sampler -- Commissioning the samplers

2. Add view result tree , Used to view request results

Select thread group -- add to -- Monitor -- Look at the fruit tree

3. Perform the test , Check whether the value of each variable is correct

6、 ... and 、 Use Beanshell The assertion completes the verification of interface results and database results

Check search request -- add to -- Assertion --BeanShell Assertion

Execute the entire script , Carry out by , The full picture of the script is as follows

 

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