Add library tests

[omnilight]

We need to have tests for the all of the library code.

Also that should be integrated with travisci

[kievo23]

command like tests?

[kstkn]

As in the first place this package is a port of Laravel's Scheduler, may be good point would be to check their tests:

https://github.com/laravel/framework/blob/master/tests/Console/ConsoleEventSchedulerTest.php
https://github.com/laravel/framework/blob/master/tests/Console/Scheduling/EventTest.php
https://github.com/laravel/framework/blob/master/tests/Console/Scheduling/CacheSchedulingMutexTest.php

[kstkn]

@omnilight please, take a look at #31, we can use this approach to port Laravel's tests

[omnilight]

For me - looks good

[kstkn]

Merged #31, will you now integrate travis, @omnilight?

[omnilight]

Let's do it

[kstkn]

@omnilight, I think only you able to do it as owner: https://github.com/marketplace/travis-ci

[kstkn]

@omnilight yup, I can add only my own repos to travis: