Added extra index test for clusterable_presenter

spec/presenters/clusterable_presenter_spec.rb

@@ -87,4 +87,20 @@ describe ClusterablePresenter do
 
     it { is_expected.to be_nil }
   end
+
+  describe '#index_path' do
+    let(:clusterable) { create(:group) }
+
+    context 'without options' do
+      subject { described_class.new(clusterable).index_path }
+
+      it { is_expected.to eq(group_clusters_path(clusterable)) }
+    end
+
+    context 'with options' do
+      subject { described_class.new(clusterable).index_path(format: :json) }
+
+      it { is_expected.to eq(group_clusters_path(clusterable, format: :json)) }
+    end
+  end
 end