spec/lib/moments_spec.rb in moments-0.0.1.alpha vs spec/lib/moments_spec.rb in moments-0.0.2.alpha

@@ -1,5 +1,6 @@
+require 'spec_helper'
 require_relative '../../lib/moments.rb'
 
 describe Moments do
   context 'calculates the distance between two given times' do
     let(:from) do
@@ -14,8 +15,14 @@
       expect do
         Moments.difference(from, to)
       end.to_not raise_error
 
       Moments.difference(from, to).should be_a Moments::Difference
+    end
+
+    it '#difference should raise an error if :from is greater than :to' do
+      expect do
+        Moments.difference(to, from)
+      end.to raise_error
     end
   end
 end