Upgrade Nightwatch to v1.2 and update bundled config and generated tests

[beatfactor]

What kind of change does this PR introduce? (check at least one)

• Bugfix
• Feature
• Code style update
• Refactor
• Docs
• Underlying tools
• Other, please describe:

Does this PR introduce a breaking change? (check one)

• Yes
• No

Overview

This PR upgrades the Nightwatch version bundled with the cli-e2e-nightwatch plugin to latest v1.2 version. In addition, it adds several new features for running end-to-end tests with Nightwatch in a Vue application a bit more pleasant of an experience.

Improvements

• switched to using standalone Webdriver (default with Chromedriver) instead of with Selenium server
• added support for running tests in Firefox (via Geckodriver)
• added built-in support for running tests in headless mode (via --headless) with Chrome and Firefox
• updated generated tests and also updated template with example custom commands, page objects, and external globals file

New CLI flags

• --use-selenium: allows using the Selenium standalone server instead of running Webdriver standalone
• --parallel: enable parallel mode via test workers (only available when using chromedriver)
• --headless: run tests with the browser (chrome/firefox) in headless mode

Other

• added more unit tests
• to run unit tests independently than the other packages, in the root folder do:

$ node scripts/test.js -p cli-plugin-e2e-nightwatch

[beatfactor]

Is it possible to upgrade Chrome in AppVeyour?

[haoqunjiang]

I've added a patchChromedriver script for AppVeyor setup in the dev branch.

[haoqunjiang]

The rest of this PR looks pretty cool to me. I'll merge it after the dependency issues get fixed.
Thanks for your help to make Nightwatch a breeze to use in Vue CLI!

[beatfactor]

The rest of this PR looks pretty cool to me. I'll merge it after the dependency issues get fixed.

Great, so to summarise, changes required:

• move selenium-server to optional peerDependencies and add a note in the Readme regarding the installation
• add geckodriver inside generator/index.js as a devDependency

Anything else I might have missed?

Thanks for your help to make Nightwatch a breeze to use in Vue CLI!

My pleasure. Feel free to reach out regarding Nightwatch related bugs and/or enhancements, we'd be happy to assist.

[haoqunjiang]

Yeah, I think that's all.

[haoqunjiang]

Tests are failing.
So selenium-server still needs to be added to devDependencies…

[haoqunjiang]

Now that the tests are run in parallel, the order of results.modules is nondeterministic, which could cause test failures.

Suggested change

	expect(Object.keys(results.modules)).toEqual([
	expect(Object.keys(results.modules.sort())).toEqual([

[vue-bot]

Hey @beatfactor, thank you for your time and effort spent on this PR, contributions like yours help make Vue better for everyone. Cheers! 💚