How to call on_start before each testcase, like setup in unittest?

Feature request

Setup method like unittest

Expected behavior

Method on_start only run once, but my testcase require different parameter recieved from an HTTP response.

If I get this variable with on_start, then only first test can pass; and if I call the get_parameter method in testcase, it will makes testresult inaccurate for the time waiting for response.

Actual behavior

Is there any method like setup with unittest(I didn’t find in document), or any suggests that can solve this scene?

[cyberw]

There’s no built in way to do that, but you can override the run task method, as done here for example https://github.com/SvenskaSpel/locust-plugins/blob/bf4097eb3a04580de886b5b138151a6b0d21660e/locust_plugins/__init__.py#L209

[cgoldberg]

similar feature is already implemented and the code has landed in master. see: https://docs.locust.io/en/latest/writing-a-locustfile.html#setups-teardowns-on-start-and-on-stop