Add HTML and FormField to the builtin interactor list.

[cowboyd]

With the advent of the the builder syntax, we have extracted the HTML interactor which is the parent of almost all of our interactors. Not only is this handy for defining new interactors, but it is useful in its own right for making abstract assertions.

This is an example from a FOLIO test suite using RTL matchers to make a very broad assertion that the text "Not Authorized" is somewhere in the document. There was no clear way on how to do this with interactors, so the fallback was to go back to using a known method from RTL.

import { expect, getByText } from './test/helpers';

expect(getByText('Not Authorized')).toBeInTheDocument();

However, by using the generic HTML interactor combined with the containing() matcher we can achieve this elegantly:

import { HTML, including } from '@bigtest/interactor';

HTML(including('Not Authorized')).exists()