Screenshot reporter doesn't wait for last screenshot before quitting

[fenduru]

Using this reporter, sometimes Protractor exits before the takeScreenshot() promise is resolved. This causes the last test to occasionally not have a screenshot generated.

My guess would be that _teardownEnv() or the driver's quit() are not chaining onto the last browser action's promise, but I'm unsure. Do you have any ideas why this would happen?

It seems to be a race condition. It only happens sometimes and I've only seen it happen with Firefox (I've tried with Firefox and Chrome)