Chai expect to be one of array elements

Question

Is there any way to assert that string is one of array elements with chai bdd? I couldn't find that in Chai API

expect("bar").to.be.one.of(["bar", "key"]);

Answer 1

Updated for 2021

The answer below prints out a better error message

expect(res.status).to.be.oneOf([400, 401]);

The error message clearly defines what the expected value is and the returned value.

E.g.

expect(200).to.be.oneOf([400, 401]);

Returns

AssertionError: expected 200 to be one of [ 400, 401 ]

Answer 2

Flip the check around:

expect(["bar", "key"]).to.include("bar");