Custom RSpec matcher for HTTP status codes

http_status_matcher.rb

# Usage: expect(response).to have_status(:unauthorized)

RSpec::Matchers.define(:have_status) do |expected|
  status_code = case expected
                when Symbol
                  Rack::Utils.status_code(expected)
                else
                  expected
                end

  match do |actual|
    actual.status == status_code
  end

  failure_message_for_should do |actual|
    "expected response status of #{status_code} but got #{actual.status}"
  end
end