Switch Controller - JMeter.

Description

• 
  
• By using a switch controller, one can move any child element under that Switch controller with switch value.
• Switch value can be an integer value or a string value.
• Elements under the switch controller are numbered from switch value 0.
• The only element with switch value is executed under the switch controller, rest all other elements are skipped for the execution.

Parameters

Attribute	Description
Name	Descriptive name of the switch controller to show in Test Plan.
Switch Value	Integer or string value. -               If switch value is out of range or empty it will run zeroth element. -               If Switch Value is a String value then it searches for element with same string value. These are case-sensitive. -               If string value is not match then element with name ‘default’ is executed (default is Case-Insensitive). -               If default is not present, then controller will not run anything.

Use Case 1

Using integer value in switch controller.

Test Plan Structure -

The test plan contains 1 simple thread group, 1 counter element, 1 switch controller. Inside the switch controller, there is one Transaction Controller with two Dummy Samplers, and 3 Dummy samplers.

Setting in the Thread Group:

1 thread with 4 iterations-

Counter element has a variable called SWITCH_VALUE and its value starts from 0 and incremented by 1 in each iteration. There are total 4 iterations in the thread group. So, value of SWITCH_VALUE is 0 in 1^st iteration, 1 in 2^nd iteration, 2 in 3^rd iteration and 3 in 4^th iteration.

 The value of SWITCH_VALUE is provided in the Switch controller.

Setting in Switch Controller:

Output:

Explanation:

• In First iteration, value of SWITCH_VALUE is 0, so Transaction Controller is executed in first iteration. Therefore Dummy Sampler 1 and Dummy Sampler 2 will be executed. 
• In Second Iteration, value of SWITCH_VALUE is becomes 1, so Dummy Sampler 3 will be executed. 
• In third Iteration, value of SWITCH_VALUE is becomes 2, so Dummy Sampler 4 will be executed.
• In fourth Iteration, value of SWITCH_VALUE is becomes 3, so Dummy Sampler 5 will be executed.

Limitations of Switch Controller

• Only support integer and String value in the Switch value, if we give floating numbers like 1.0, 2.5 etc. then Switch Controller will not be executed.