Unit Testing with new features from 6.2.0

[SethDavenport]

Work in progress.

[SethDavenport]

@e-schultz @Bronzovik related to our discussion from the other day about making it easier to mock NgRedux/store for unit testing.

The idea would be to move the NgReduxTestingModule currently in the testing folder into @angular-redux/store itself; I'm just proving it out in the example app currently.

This way, you just add NgReduxTestingModule to your TestBed imports, and it gives you properly set-up mocks for NgRedux and DevToolsExtension, which work for @select components as well.

Then you can either

• spy on select/@select and dispatch using MockNgRedux.spyOnSelect/MockNgRedux.spyOnDispatch(which return Jasmine Spies)
• or set up stubs for specific select calls using MockNgRedux.registerSelection('foo', ['mock', 'foo', 'value', 'stream'])

[DroneKid]

Looks great!