Warn the user when testing configuration is not complete

On behalf of @qubitron

Repo: github.com/qubitron/hello-stackoverflow

Scenario 1

• Enable unit tests (do not configure the args)
• Running and discovering tests fail

Suggestion: Check if args are empty, if they are, then display a prompt to configure test framework

~Other errors~

• ~Testing with PyTest failed~
• ~Debug adapter failed regularly leaving extension in a bad state (requiring restart of VS Code)~
  • ~Status bar had a message running tests (this never went away)~
  • ~Debugger bar appeared on the top (clicking stop did nothing)~
  • ~Debug adapter failed with usual message Debug adapter failed unexpectedly~
• ~Deleting Experimental Debugger configuration settings from launch.json fixed a lot of the issues~

Todo:

• Improve error handling and logging (diagnosing)
• User should never have to reload VS Code ~* Recover from a state where debugger has a message running tests~

[brettcannon]

@DonJayamanne I tweaked the title to try and reflect what I think the issue is. Basically this is if "python.unitTest.unittestEnabled": true but "python.unitTest.unittestArgs" is unset?

[paulacamargo25]

I’m going to close the issue, because even if the configuration is done manually, and only the value of “unittestEnabled” is updated, when trying to run the tests, it shows this: In other words, it shows you that the configuration is wrong or incomplete and suggests you do it again.