require 'spec_helper.rb' describe Rack::OAuth2::Client::Grant::RefreshToken do let(:grant) { Rack::OAuth2::Client::Grant::RefreshToken } context 'when refresh_token is given' do let :attributes do {:refresh_token => 'refresh_token'} end subject { grant.new attributes } its(:to_hash) do should == {:grant_type => :refresh_token, :refresh_token => 'refresh_token'} end end context 'otherwise' do it do expect { grant.new }.should raise_error AttrRequired::AttrMissing end end end