Dockerize Jason's browser unit testing

[evdokimovs]

Part of #27

Required for #33

Synopsis

Because rustwasm/wasm-bindgen#1744 done we may use remote webdriver for Jason unit tests.

For Chrome we will use selenoid/chrome Docker image.

For Firefox was decided to wrote own Dockerfile and use it. This image will be available as instrumentisto/geckodriver on Docker Hub. Source codes for this image you can find in instrumentisto/geckodriver-docker-image repo. Due to this Dockerfile we can use any version of Firefox (just build it with needed build-arg and publish to Docker Hub).

Solution

• 1. Write Dockerfile for instrumentisto/geckodriver
• 2. Create webdriver.conf with needed prefs
  • 2.2. for Chrome
  • 2.1. for Firefox
• 3. Write Makefile rules for boot up dockerized WebDriver and run tests
  • 3.1. in instrumentisto/geckodriver
  • 3.2. in selenoid/chrome
• 4. Delete outdated CHROMEDRIVER_CLIENT_ARGS from .env
• 5. Publish instrumentisto/geckodriver to Docker Hub

Checklist

• Created PR:
  • In draft mode
  • Name contains WIP: prefix
  • Name contains issue reference
  • Has k:: labels applied
  • Has assignee
• Documentation is updated (if required)
• Tests are updated (if required)
• Changes conform code style
• CHANGELOG entry is added (if required)
• FCM (final commit message) is posted
  • and approved
• Review is completed and changes are approved
• Before merge:
  • Milestone is set
  • PR's name and description are correct and up-to-date
  • WIP: prefix is removed
  • All temporary labels are removed

[evdokimovs]

FCM

Dockerize Jason unit testing and add Firefox support (#56)

- create webdriver.json with Chrome and Firefox WebDriver preferences
- delete outdated CHROMEDRIVER_CLIENT_ARGS env var from .env file
- add Makefile commands to boot up dockerized WebDriver and run tests
- update Travis CI spec to run Jason unit tests in dockerized Chrome and Firefox

Additionally:
- use stable Rust for Jason tests in Travis CI

[evdokimovs]

@tyranron , @alexlapa ,

Для этого PR нужно будет опубликовать instrumentisto/geckodriver-docker-image на Docker Hub под именем instrumentisto/geckodriver. На данный момент в Makefile используется образ с instrumentisto/geckodriver, поэтому тесты не будут проходить. Если захотите прогнать их до публикации от имени instrumentisto, то можете заменить instrumentisto/geckodriver на alexlapa/geckodriver.

Также желательно все же прогнать CI после публикации instrumentisto/geckodriver, чтобы убедиться, что все работает.

[tyranron]

Docker image is released: https://hub.docker.com/r/instrumentisto/geckodriver