Use of JSON extractor originals in JMeter

Catalog

 

jmeter in JSON Extractor usage

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jmeter in JSON Extractor usage

One 、 Basic information

used jmeter edition ：jmeter4.0

Recorded function name ：JSON Extractor

Two 、 Use requirements

The returned result is complex and json Structural HTTP Request to extract a value , For use as other interfaces or assertions, etc .

3、 ... and 、 Usage method

1、 Add step ： Select... In the thread group HTTP request —— Right click “ add to ”—— Post Processors ——JSON Extractor

Here is the following ：

2、 Example is given to illustrate

This process mainly explains how to write JSON Extractor Match expressions and how to verify what you write JSON Extractor Whether it is right

{ For the sake of convenience , see json The directory level of is displayed with the results of packet capturing ,jmeter The returned cannot be shrunk , Inconvenient to view }

√、 We use JSON Extractor Match the first level content message Value （ For the convenience of checking, the unnecessary levels are put away ）. The returned structure of packet capturing view is as follows ：

 

Use jmeter In the view structure tree  json path expression You can test what you write JSON Extractor If there is something wrong . The test results are as follows ：

 √、 We use JSON Extractor Match the second level content total Value （ For the convenience of checking, the unnecessary levels are put away ）. The returned structure of packet capturing view is as follows ：

 

Use jmeter In the view structure tree  json path expression You can test what you write JSON Extractor If there is something wrong . The test results are as follows ：

√、 We use JSON Extractor Match the third level content id Value （ For the convenience of checking, the unnecessary levels are put away ）. The returned structure of packet capturing view is as follows ：

Use jmeter In the view structure tree  json path expression You can test what you write JSON Extractor If there is something wrong . The test results are as follows ：

notes ： About the one used [0] It will be explained later .

√、 About the usage of matching the contents of an array .

About the same , The matching examples at different levels have all been explained , According to the gourd painting ladle, you should be able to learn some . But there are still some things that need to be explained in this process, which will be explained later ~~~.

Four 、 Learn to use

The previous process explains how to write JSON Extractor Match expressions and how to verify what you write JSON Extractor Whether it is right , The next process is mainly to remember how to use the written JSON Extractor Match expression .

Added two HTTP request , Directory as follows ：

example ： Get the list interface of the pending delivery order and the interface to view the details of the pending delivery order , The process to be implemented is ： First get the list of documents to be delivered , And then use JSON Extractor Get one of the list stockOutId The value of is then used in the second interface , And return the content .

Look again. JSON Extractor The content in , In fact, it is directly in json path expression The test verifies that the correct expression is copied here .

Why do you suddenly feel that there is nothing to say , How to write has been described , How to use it is also illustrated .

Mark a few parameters

names of created Variable ： Saved variable name , Use... In the back ${ Variable name } quote , Such as ：${stockOutId}

JSON Path  expressions： The last step is debugging json path expression , If ：$.data.list[0].stockOutId

Match No.(0 for Random)： Match the Numbers （0 For random ,1 On behalf of the first ,-1 On behalf of all ）

Default Values： Default value not found , Generally set as NOT FOUND

Compute concatenation var(suffix_ALL)： Whether to count all , All values to be matched are saved , be known as “ Variable name _ALL”, There are multiple values that need to be obtained to use the scenario , Later, we need to operate on this set of data .

5、 ... and 、 Pay special attention to

1、json strand [] Represents an array of objects ,{} Representing objects

2、 If you need to match multiple values at the same time , It can be set as shown in the figure

3、 In the second step list[0] Instructions for use ：[0] Means to match the first value ,[1] Indicates that the second value is matched ,[*] Indicates that all values are matched , Pictured ：

4、JSON Extractor Mainly used to match the returned data structure is json Parameter extraction of

  For those who need to know the usage of function assistants, please come here ：https://www.cnblogs.com/Zhan-W/p/10197677.html

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