make specs green

spec/controllers/suppliers/product_categories_controller_spec.rb

@@ -19,7 +19,7 @@ describe Suppliers::ProductCategoriesController, type: :controller do
     it "does not include product_categories from another supplier" do
       product_category1 = create :product_category, supplier: @supplier
       product_category2 = create :product_category
-      get :index
+      get :index, format: :json
       assigns(:product_categories).should eq([product_category1])
     end
 
@@ -28,29 +28,22 @@ describe Suppliers::ProductCategoriesController, type: :controller do
   describe "GET #show" do
     it "assigns the requested product_category to @product_category" do
       product_category = create :product_category, supplier: @supplier
-      get :show, id: product_category
+      get :show, id: product_category, format: :json
       assigns(:product_category).should eq(product_category)
     end
 
     it "should not display a product_category of another supplier" do
       product_category = create :product_category
-      get :show, id: product_category
+      get :show, id: product_category, format: :json
       response.status.should == 404
     end
   end
 
-  describe "GET #new" do
-    it "assigns a new product_category to @product_category" do
-      get :new
-      assigns(:product_category).should be_a ProductCategory
-    end
-  end
-
   describe "POST #create" do
     context "with valid attributes" do
       it "creates a new product_category" do
         expect{
-          post :create, product_category: valid_attributes
+          post :create, product_category: valid_attributes, format: :json
         }.to change(ProductCategory, :count).by(1)
       end
 
@@ -69,12 +62,12 @@ describe Suppliers::ProductCategoriesController, type: :controller do
     context "with invalid attributes" do
       it "does not save the new product_category" do
         expect{
-          post :create, product_category: invalid_attributes
+          post :create, product_category: invalid_attributes, format: :json
         }.not_to change{ ProductCategory.count }
       end
 
       it 'returns an error object' do
-        post :create, format: :json, product_category: invalid_attributes
+        post :create, format: :json, product_category: invalid_attributes, format: :json
         expect( JSON.parse(response.body)['errors'] ).to be_present
       end
     end