* adding more tests
- covers article.jsx and elements created from its props and state
- added png as static file that needs stubbing
* video + channelDetails test coverage
* chat + channels tests
* channels cc refactor
* yarn install
* update snapshot and string spacing
* chat.jsx test
mostly tests rendering elements
- does not test imported components, as those are already tested separately
- does not imported functions from actions or utils as those will be tested separately as well
* cleaning up
- mocked response with flush promises for state/component to reflect appropriate changes
* snapshot updates
