@Marvin I have a function that calls some tasks, and result persistence activated by default. How can I test that function with pytest without having the inner tasks persisting their result?

To test your function with pytest without having the inner tasks persist their results, you can explicitly disable result persistence for the tasks within your test setup. Here's how you can do it: 1. Use the

persist_result

parameter: You can set

persist_result=False

on each task decorator within your test setup to ensure that results are not persisted. 2. Environment Variable Override: If you have result persistence enabled globally, you can temporarily override this setting in your test environment by setting the

PREFECT_TASKS_DEFAULT_PERSIST_RESULT

environment variable to

false

. Here's an example of how you might configure this in a Python test using pytest:

python
from prefect import flow, task

# Example task with persistence disabled for testing
@task(persist_result=False)
def my_task(x):
    return x * 2

@flow
def my_flow(x):
    return my_task(x)

def test_my_flow():
    result = my_flow(10)
    assert result == 20

In this example,

persist_result=False

ensures that the task's result is not persisted during the test run. Adjust your environment or task decorators accordingly based on your setup. For more details, you can refer to the Prefect documentation on result persistence and settings reference.