JMeter loop controller and CSV data file settings are used together

Catalog

1. Preparation before execution

2. Execution order

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1. Preparation before execution

Demand is ： There is a variable , The variables are 3 Values need to be executed circularly , Look at the results ;

• Add thread group
• add to http request
• Add loop controller
• add to CSV Data file settings
• Add debugger （ You can check whether the value obtained each time is correct ）

2. Execution order

1.CSV file 、 debugging 、 request

What I use is a variable , If there are multiple variables , It can be separated by English commas ;

CSV The file is consistent with the setting of the number of cycles , For example, the data value in the file is 3 individual , Then cycle 3 Time （ Of course, the loop is also related to the number of loops in the thread group , The default thread group is 1）.

It should be noted that CSV It needs to be placed under the cycle controller , Otherwise, the file is not read correctly , Of course, the request interface should also be placed under the loop controller .

2. Correct sorting

 tips: Sort according to the pictures , The execution result is three groups （ The cycle controller is set to cycle 3 Time ）

• The request is not placed under the loop controller , Then the file executes only the first value , The remaining two... Will not be executed ;
• The same is true for debugging the sampler , If placed outside the cycle controller , Then only the data of the last execution will be displayed , The data will not be displayed every time ;

3. Related to thread group

  If you set 3 Time , The final result is 9 Time , That is, the thread group is the largest loop , The circulation controller is on the inner layer .