Circle ci: dockerized tests

[jploskonka]

Why?

#747 introduced dockerized test environment for easier usage in development. However TravisCI still use non-dockerized way of running it. Also Docker is fun and I really want to have Appium tests working in emulator :D

Differences with TravisCI

• builds against 3 node versions instead of 2 (6.9.5, 8.9.1 and 9.2.0)
• Running acceptance tests (we skip them on travis)
• Because of building docker containers and my lack of experience with optimizing it build takes a bit longer than TravisCI (~14min vs ~10min). However for one more node version and additional acceptance specs I'd say it's not bad for first version :)

TODO

• - move shell scripts to well... shell scripts instead of keeping them in yml :P
• - simplify config.yml
• - Fix 2 examples failing on CircleCI

@DavertMik I have two WebDriverIO exmaples failing on CircleCI unfortunately, I wasn't able to reproduce it locally and it also used to work OK there - I have no idea yet what is going on here :D If you have any suggestion what may be wrong please let me know, maybe you saw something like this before :)

[DavertMik]

Looks good to me! We can keep Travis CI for fast feedback and use Circle for heavy tests.
And what about Appium? You see the way to make it work in emulator? ;)

[jploskonka]

I will have one more shot at those failing scenarios before merging this week - it's for sure some small mistake ;) Also I cleaned up config, removed my "optimizations" (I way overdid it with circle workflows and custom caching :D) and went down to little bit over 10min build :)

As for Appium I haven't look into that yet but for sure will follow one day, I have pretty limited time for codecept unfortunately right now.

[DavertMik]

I have pretty limited time for codecept unfortunately right now.

Wow. your limited time looks like greater than mine )
Ok, will be waiting for final update then!
Btw, looks like we are going to remove Node 6 support so it can be dropped from versions

[jploskonka]

@DavertMik looks ready to merge :D

I'm not sure why travis build wasn't triggered for this one, it passed for my fork: https://travis-ci.org/jploskonka/CodeceptJS/builds/309036420

Also I had problems with expectError utility, for some unknown to me reason examples with it started failing because expectations were applied against error thrown by it instead of expected. Always good to remove some code ;-)