[Console] terminals are not interactive on Travis

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| License       | MIT
| Doc PR        | 

You cannot assume that the input is always interactive when the tests
for the `Application` class are executed. The expected value depends
on the terminal being interactive.
The expected value depending on the terminal type is actually already checked four lines below (taking `posix_isatty()` into account).