address-book.test chai has no member expect

[sudo-pel]

I was directed to post an issue on the repo after contacting support.

I am trying to run the first test on the address book challenge, following the solution and I am being given the error "No test files found". I tried to fix this using the solution shown here (#1052), which worked somewhat, but now I am running into a different error;

test/address-book.test.ts:19:27 - error TS2339: Property 'name' does not exist on type 'Function'.

19     expect(ab.constructor.name).to.eq("AddressBook");

which is not encountered in the course. I have made no other alterations to any of the files.

Additionally, despite installing chai, in the address-book.test.ts file, I am being told that module "chai" has no member "expect".