spec/index/categorical_index_spec.rb in daru-0.1.4.1 vs spec/index/categorical_index_spec.rb in daru-0.1.5

@@ -140,15 +140,17 @@
     
     context "single index" do
       subject { idx.add :c }
       
       its(:to_a) { is_expected.to eq [:a, 1, :a, 1, :c] }
+      its(:categories) { is_expected.to eq [:a, 1, :c] }
     end
     
     context "multiple indexes" do
       subject { idx.add :c, :d }
       
       its(:to_a) { is_expected.to eq [:a, 1, :a, 1, :c, :d] }
+      its(:categories) { is_expected.to eq [:a, 1, :c, :d] }
     end
   end
   
   context "#valid?" do
     let(:idx) { described_class.new [:a, 1, :a, 1] }
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