Start on Item and ItemSet

spec/imbecile/parser/item_spec.rb

@@ -0,0 +1,19 @@
+class Imbecile
+  class Parser
+
+    describe Item do
+
+      it "operates properly with a set" do
+        rule = Object.new
+        item1 = Item.new(rule, 2)
+        item2 = Item.new(rule, 2)
+        expect(item1).to eq item2
+        expect(item1.eql?(item2)).to be_truthy
+        set = Set.new([item1, item2])
+        expect(set.size).to eq 1
+      end
+
+    end
+
+  end
+end