Add assertions on input value

[allansson]

What?

Sometimes you need to assert that an input has a certain value, e.g. after auto-filling a form. Users should be able to add an assertion that checks the value of an input against a value specified by them.

There should be a tool that allows a user to pick an element and add an input value assertion.

Criteria for considering it done

The user should be able to pick an input or textarea and add an assertion on its value. The event should be visible in the browser event log and a call to expect().toHaveValue() should be emitted in the script.