We need to add unit tests to ix-chips.

Since this is one of the core components, it should be thoroughly tested both to ensure safety, but also to document all weird little behaviours.

Tests should be low level, i.e. check html structure.

Examples of possible cases:

• it shows label when it is provided

• it shows asterisk when required is true

• it sets value when user types it in

• it sets value when user selects it from autocomplete

etc.