Fail test if conversation is empty

[Naktibalda]

If conversation is empty it isn't testing anything, so it should fail.

This change should help to understand issue caused by using \n on Windows easier.
It is very confusing for new users like me.

[codeforequity-at]

Hi, this is basically a very fine addition.
Would you mind to rewrite your code to use the "readConvoReject(err)"-Callback instead of throwing an exception - just to follow the general coding style.

[codeforequity-at]

Would you mind to rewrite your code to use the "readConvoReject(err)"-Callback instead of throwing an exception - just to follow the general coding style.

[Naktibalda]

That exception is caught 3 lines down.

[codeforequity-at]

Solved with latest commit! Thanks for your input!