Ranges question

spec/golf_spec.rb

@@ -105,6 +105,21 @@
   end
 
 
+  describe ".hole7" do
+    it "should collapse consecutive numbers to a range" do
+      Golf.hole7([1,2,3]).should eql ["1-3"]
+    end
+
+    it "should keep separate ranges distinct" do
+      Golf.hole7([1,2,3,5,6,7,100,101]).should eql ["1-3","5-7","100-101"]
+    end
+
+    it "should show isolated digits on their own" do
+      Golf.hole7([1,2,3,5,10,11,12]).should eql ["1-3","5","10-12"]
+    end
+  end
+
+
   describe ".hole8" do
     it "should give the first N numbers of the fibonacci sequence" do
       Golf.hole8(5).should eql [1,1,2,3,5]