example_7.rb

describe UserSearch do
  describe "#results" do
    let(:user_scope) { double }

    before do
      User.stub(scoped: user_scope)
    end

    def results(options = {})
      described_class.new(options).results
    end

    it "returns Users" do
      expect(results).to eq(user_scope)
    end

    it "scopes by name" do
      scoped_by_name = double
      user_scope.stub(:name_matching).with("Lee")
        .and_return(scoped_by_name)
        
      # Note that 'results' is a method defined above
      expect(results(name: "Lee")).to eq(scoped_by_name)
    end

    it "scopes by email" do
      scoped_by_email = double
      user_scope.stub(:email_matching)
        .with("lee@gmail.com")
        .and_return(scoped_by_email)
        
      expect(results(email: "lee@gmail.com")).to eq(scoped_by_email)
    end

    it "combines options" do
      scoped_by_name_and_email = double
      scoped_by_name           = double

      user_scope.stub(:name_matching)
        .with("Lee")
        .and_return(scoped_by_name)

      scoped_by_name.stub(:email_matching)
        .with("lee@gmail.com")
        .and_return(scoped_by_name_and_email)

      expect(results(name: "Lee", email: "lee@gmail.com"))
        .to eq(scoped_by_name_and_email)
    end
  end
end