gistfile1.rb

# activity.rb

  def full_duration
    return (duration_in_minutes.to_f / 60).round(1)
  end

# activity_spec.rb

  describe "full_duration()" do
    context "when duration_in_minutes is saved in the database" do
      let(:duration_in_minutes) { mock "duration in minutes" }

      before :each do
        activity.stub :duration_in_minutes => duration_in_minutes
      end

      it "gets the duration_in_minutes from the database" do
        activity.should_receive :duration_in_minutes
        activity.full_duration
      end

      it "converts the minutes into fractional hours" do
        activity.duration_in_minutes.should_receive(:to_f).should_receive('/').should_receive(:round).with(1)
        activity.full_duration
      end

      it "returns the duration in fractional hours" do
        activity.full_duration.should equal (duration_in_minutes.to_f / 60).round(1)
      end
    end

    context "started_on and ended_on refer to days only" do
    end

    context "started_on and ended_on refer to times" do
    end
  end