Add posibility to clean up dir before tests

[brbrr]

with cleanDir option

var allure = new Allure();
allure.setOptions({ cleanDir: true });

allure results dir would be cleaned up before start

[just-boris]

Hello, thanks for your contribution!

But, unfortunately, I cannot accept your changes.

• It will break wdio-allure-reporter. It creates several Allure class instances for each target browser and runs them in parallel, so with this option threads would erase results of each other
• The same thing, that you have multibrowser run on your own. Imagine the following test command

BROWSER=chrome npm test && BROWSER=firefox npm test

There your solution also wouldn't work.

Also I understand our fault that we haven't provided any official solution to clean up result dir before test start. Actually we have this in example with Mocha. If you run your tests with npm test command, the pretest script also will be automatically executed before main test script, so this is a good place to put cleanup command.

@brbrr will this solution help you?

[just-boris]

Closing due to inactivity