added a failing spec for [ice-cube-ruby#241] occurrence_between with an alternating weekly schedule

Author: hughkelsey

spec/examples/regression_spec.rb

@@ -226,6 +226,21 @@ module IceCube
           time.usec.should == 0
         end
 
+        describe 'weekly schedule with interval' do
+          let(:schedule) {Schedule.new('2014-01-08'.to_date)}
+          let(:expected_occurrence) {'2014-07-24'.to_date.to_time}
+          before :each do
+            schedule.add_recurrence_rule Rule.weekly(2).day([4,5,6])
+          end
+          it "should include the expected date" do
+            expect(schedule.occurs_on?(expected_occurrence)).to be_true
+            expect(schedule.occurrences_between(expected_occurrence - 7.days, expected_occurrence + 7.days)).to include(expected_occurrence)
+            expect(schedule.occurrences_between(expected_occurrence - 1.day, expected_occurrence + 1.day)).to include(expected_occurrence)
+            expect(schedule.occurrences_between(expected_occurrence - 6.days, expected_occurrence + 6.days)).to include(expected_occurrence)
+            expect(schedule.occurrences_between(expected_occurrence - 5.days, expected_occurrence + 5.days)).to include(expected_occurrence)
+          end
+        end
+
       end
     end