Rspec: Should be (this or that)

Question

What would be the best way to write the rspec in a situation where either of two (or more) outcomes are acceptable?

Here\'s an example of what I want to do. This is

Answer 1

I know this is old but in I ran into this on RSpec 3.4, there is an or keyword now. So this is valid:

expect(flip_coin).to eq('heads').or(eq('tails'))