Move controller spec to serializer spec

spec/controllers/shop_controller_spec.rb

@@ -111,14 +111,6 @@ describe ShopController do
         response.body.should be_empty
       end
 
-      it "scopes variants for a product to the order cycle and distributor" do
-        controller.stub(:current_order_cycle).and_return order_cycle      
-        controller.stub(:current_distributor).and_return d
-        Spree::Product.any_instance.should_receive(:variants_for).with(order_cycle, d).and_return(m = double())
-        m.stub(:in_stock).and_return []
-        xhr :get, :products
-      end
-
       context "RABL tests" do
         render_views
         before do

spec/serializers/product_serializer_spec.rb

@@ -0,0 +1,14 @@
+describe Api::ProductSerializer do
+  let(:hub) { create(:distributor_enterprise) }
+  let(:oc) { create(:simple_order_cycle, distributors: [hub], variants: [v1]) }
+  let(:p) { create(:simple_product) }
+  let!(:v1) { create(:variant, product: p, unit_value: 3) }
+  let!(:v2) { create(:variant, product: p, unit_value: 5) }
+
+  it "scopes variants to distribution" do
+    s = Api::ProductSerializer.new p, current_distributor: hub, current_order_cycle: oc
+    json = s.to_json
+    json.should     include v1.options_text
+    json.should_not include v2.options_text
+  end
+end