Testing terminal frontend.

[ethercrow]

I've just read http://www.drmaciver.com/2015/05/using-tmux-to-test-your-console-applications/ and can think of three kinds of tests that can be written in this manner.

1. Tests for frontend display. These feed the frontend Editor values and check that resulting "screenshots" are equal to expected ones.
2. Tests for frontend handling user input. These call tmux send-key blah and check that correct Event values come in from the frontend.
3. Tests for the whole editor as an interactive application, keys come in, screenshots come out. Timing things here will probably be interesting too.

I don't know if travis jobs would handle tmux sessions though.

[Fuuzetsu]

As the linked post says, probably want a library that does this in the background and then we can use that.

I don't see any reason why we couldn't do tmux sessions on travis.