Understanding and Using Test Fragments in JMeter

What Is a Test Fragment?

A special thread group applied to a controller that sits at the same level as thread groups and must be used together with an Include Controller or Module Controller to be executed. Referenced logical controllers or test fragments can be disabled, yet they will still run when referenced.

Application Scenarios

When a JMeter script becomes very complex, test fragments can be used to modularly manage test cases.

When multiple testers collaborate on a JMeter script, test fragments allow division of work and modular management of test cases.

Creating a Test Fragment

Test Plan → Add → Test Fragment

Adding Scripts Under a Test Fragment

Encapsulate pre‑scripts such as login, real‑name authentication, and bank‑card binding within the test fragment.

Using a Module Controller to Call a Test Fragment

The Module Controller provides a runtime mechanism to replace a test fragment with the current test plan. Test fragments can reside in any thread group. Add a Module Controller via Thread Group → Add → Logic Controller → Module Controller.

Selecting the Test Fragment in the Module Controller

Use the quick‑search and jump feature; clicking will immediately navigate to the selected logical controller’s details.

Run and View Results

After execution, you can see that the login, real‑name authentication, and bank‑card binding scripts under the test fragment have been called and executed.

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