Hmm, this question pops up regularly.

A databricks docker image (single node) for the different runtimes which can be deployed for test purposes/dev work.

I would like that... I agree Databricks is cloud based and tests should be ran on the cloud platform. But there is also a case for running unit tests etc on a local container.

I think you are stuck running tests on databricks itself for the moment.

I am sure there will be a lot of improvements on the whole dev workflow.