Remove non-Rails-5 features from controller spec scaffold

lib/generators/rspec/scaffold/templates/controller_spec.rb

@@ -17,6 +17,11 @@
 # is no simpler way to get a handle on the object needed for the example.
 # Message expectations are only used when there is no simpler way to specify
 # that an instance is receiving a specific message.
+#
+# Also compared to earlier versions of this generator, there are no longer any
+# expectations of assigns and templates rendered. These features have been
+# removed from Rails core in Rails 5, but can be added back in via the
+# `rails-controller-testing` gem.
 
 <% module_namespacing do -%>
 RSpec.describe <%= controller_class_name %>Controller, <%= type_metatag(:controller) %> do
@@ -39,50 +44,50 @@
 
 <% unless options[:singleton] -%>
   describe "GET #index" do
-    it "assigns all <%= table_name.pluralize %> as @<%= table_name.pluralize %>" do
+    it "returns a success response" do
       <%= file_name %> = <%= class_name %>.create! valid_attributes
 <% if RUBY_VERSION < '1.9.3' -%>
       get :index, {}, valid_session
 <% else -%>
       get :index, params: {}, session: valid_session
 <% end -%>
-      expect(assigns(:<%= table_name %>)).to eq([<%= file_name %>])
+      expect(response).to be_success
     end
   end
 
 <% end -%>
   describe "GET #show" do
-    it "assigns the requested <%= ns_file_name %> as @<%= ns_file_name %>" do
+    it "returns a success response" do
       <%= file_name %> = <%= class_name %>.create! valid_attributes
 <% if RUBY_VERSION < '1.9.3' -%>
       get :show, {:id => <%= file_name %>.to_param}, valid_session
 <% else -%>
       get :show, params: {id: <%= file_name %>.to_param}, session: valid_session
 <% end -%>
-      expect(assigns(:<%= ns_file_name %>)).to eq(<%= file_name %>)
+      expect(response).to be_success
     end
   end
 
   describe "GET #new" do
-    it "assigns a new <%= ns_file_name %> as @<%= ns_file_name %>" do
+    it "returns a success response" do
 <% if RUBY_VERSION < '1.9.3' -%>
       get :new, {}, valid_session
 <% else -%>
       get :new, params: {}, session: valid_session
 <% end -%>
-      expect(assigns(:<%= ns_file_name %>)).to be_a_new(<%= class_name %>)
+      expect(response).to be_success
     end
   end
 
   describe "GET #edit" do
-    it "assigns the requested <%= ns_file_name %> as @<%= ns_file_name %>" do
+    it "returns a success response" do
       <%= file_name %> = <%= class_name %>.create! valid_attributes
 <% if RUBY_VERSION < '1.9.3' -%>
       get :edit, {:id => <%= file_name %>.to_param}, valid_session
 <% else -%>
       get :edit, params: {id: <%= file_name %>.to_param}, session: valid_session
 <% end -%>
-      expect(assigns(:<%= ns_file_name %>)).to eq(<%= file_name %>)
+      expect(response).to be_success
     end
   end
 
@@ -98,16 +103,6 @@
         }.to change(<%= class_name %>, :count).by(1)
       end
 
-      it "assigns a newly created <%= ns_file_name %> as @<%= ns_file_name %>" do
-<% if RUBY_VERSION < '1.9.3' -%>
-        post :create, {:<%= ns_file_name %> => valid_attributes}, valid_session
-<% else -%>
-        post :create, params: {<%= ns_file_name %>: valid_attributes}, session: valid_session
-<% end -%>
-        expect(assigns(:<%= ns_file_name %>)).to be_a(<%= class_name %>)
-        expect(assigns(:<%= ns_file_name %>)).to be_persisted
-      end
-
       it "redirects to the created <%= ns_file_name %>" do
 <% if RUBY_VERSION < '1.9.3' -%>
         post :create, {:<%= ns_file_name %> => valid_attributes}, valid_session
@@ -119,22 +114,13 @@
     end
 
     context "with invalid params" do
-      it "assigns a newly created but unsaved <%= ns_file_name %> as @<%= ns_file_name %>" do
+      it "returns a success response (i.e. to display the 'new' template)" do
 <% if RUBY_VERSION < '1.9.3' -%>
         post :create, {:<%= ns_file_name %> => invalid_attributes}, valid_session
 <% else -%>
         post :create, params: {<%= ns_file_name %>: invalid_attributes}, session: valid_session
 <% end -%>
-        expect(assigns(:<%= ns_file_name %>)).to be_a_new(<%= class_name %>)
-      end
-
-      it "re-renders the 'new' template" do
-<% if RUBY_VERSION < '1.9.3' -%>
-        post :create, {:<%= ns_file_name %> => invalid_attributes}, valid_session
-<% else -%>
-        post :create, params: {<%= ns_file_name %>: invalid_attributes}, session: valid_session
-<% end -%>
-        expect(response).to render_template("new")
+        expect(response).to be_success
       end
     end
   end
@@ -156,16 +142,6 @@
         skip("Add assertions for updated state")
       end
 
-      it "assigns the requested <%= ns_file_name %> as @<%= ns_file_name %>" do
-        <%= file_name %> = <%= class_name %>.create! valid_attributes
-<% if RUBY_VERSION < '1.9.3' -%>
-        put :update, {:id => <%= file_name %>.to_param, :<%= ns_file_name %> => valid_attributes}, valid_session
-<% else -%>
-        put :update, params: {id: <%= file_name %>.to_param, <%= ns_file_name %>: valid_attributes}, session: valid_session
-<% end -%>
-        expect(assigns(:<%= ns_file_name %>)).to eq(<%= file_name %>)
-      end
-
       it "redirects to the <%= ns_file_name %>" do
         <%= file_name %> = <%= class_name %>.create! valid_attributes
 <% if RUBY_VERSION < '1.9.3' -%>
@@ -178,24 +154,14 @@
     end
 
     context "with invalid params" do
-      it "assigns the <%= ns_file_name %> as @<%= ns_file_name %>" do
-        <%= file_name %> = <%= class_name %>.create! valid_attributes
-<% if RUBY_VERSION < '1.9.3' -%>
-        put :update, {:id => <%= file_name %>.to_param, :<%= ns_file_name %> => invalid_attributes}, valid_session
-<% else -%>
-        put :update, params: {id: <%= file_name %>.to_param, <%= ns_file_name %>: invalid_attributes}, session: valid_session
-<% end -%>
-        expect(assigns(:<%= ns_file_name %>)).to eq(<%= file_name %>)
-      end
-
-      it "re-renders the 'edit' template" do
+      it "returns a success response (i.e. to display the 'edit' template)" do
         <%= file_name %> = <%= class_name %>.create! valid_attributes
 <% if RUBY_VERSION < '1.9.3' -%>
         put :update, {:id => <%= file_name %>.to_param, :<%= ns_file_name %> => invalid_attributes}, valid_session
 <% else -%>
         put :update, params: {id: <%= file_name %>.to_param, <%= ns_file_name %>: invalid_attributes}, session: valid_session
 <% end -%>
-        expect(response).to render_template("edit")
+        expect(response).to be_success
       end
     end
   end