Add cli with node and browser support

[SemenchenkoVitaliy]

Closes: https://github.com/metarhia/metatests/issues/74

[SemenchenkoVitaliy]

Some data about run can be defined in config file 'test/config.metatests'. Example:

{
    "logLevel": "disable",
    "browsers": [
      "Chrome",
      "Firefox"
    ],
    "port": 9876,
    "simultaniousBrowserNumber": 0
}

were:

• logLevel: "disable" | "error" | "warn" | "info" | "debug"
• browsers: "Chrome" | "Firefox" | "IE" | "Opera" | "PhantomJS" | "Safari"
• simultaniousBrowserNumber - number of browsers doing tests simultaniosly. 0 removes limit. I suggest removing it from config and always set to 1, because in other case messages from different browsers will be mixed.

To make browser tests work common.js should be changed.

.map(path => './lib/' + path).map(require);

should be replaced with

.map(path => require('./lib/' + path));

because karma-webpack handles dynamic 'require' by parsing files and preloading packages;

Also, @lundibundi, while you are refactoring metatests, can you, please specify explicitly process.exit whenever you finish testing? Something like

process.exit(!successed);

instead of

if (!successed) process.exit(1);

[lundibundi]

Blocking before https://github.com/metarhia/metatests/pull/79.

[lundibundi]

ping @SemenchenkoVitaliy.

[SemenchenkoVitaliy]

I think lib/walk.js should be deleted because cli don't use it anymore. Also, if tests for metatests will run in browser, a separate folder or file with tests should be created which will exclude tests/exit-code.js since child_process can't be required in browser. @nechaido @lundibundi WDYT?

[nechaido]

@SemenchenkoVitaliy it may be a good idea to add an ability ignore files based on a path or regexp.

[lundibundi]

I think lib/walk.js can be removed, your functionality completely covers what it was doing. I think it was supposed to be used for cli but even if we do need it, it should be placed in metarhia-common, not here.

[SemenchenkoVitaliy]

Blocking before common v0.0.33.

[tshemsedinov]

Common v 0.0.33 released

[lundibundi]

@SemenchenkoVitaliy is this finished and can be landed?

[belochub]

Landed in https://github.com/metarhia/metatests/commit/ec532d6ca5fe0c65a09f4b1fb3910bb79a6d17de.