Refactors PostsController and adds unit tests.

app/controllers/posts_controller.rb

@@ -64,7 +64,7 @@ class PostsController < ApplicationController
     post = post.first
     post.image_sizes = params[:image_sizes] if params[:image_sizes].present?
 
-    if !guardian.can_edit?(post) && post.user_id == current_user.id && post.edit_time_limit_expired?
+    if too_late_to(:edit, post)
       render json: {errors: [I18n.t('too_late_to_edit')]}, status: 422
       return
     end
@@ -134,7 +134,7 @@ class PostsController < ApplicationController
   def destroy
     post = find_post_from_params
 
-    if !guardian.can_delete_post?(post) && post.user_id == current_user.id && post.edit_time_limit_expired?
+    if too_late_to(:delete_post, post)
       render json: {errors: [I18n.t('too_late_to_edit')]}, status: 422
       return
     end
@@ -269,4 +269,8 @@ class PostsController < ApplicationController
     end
   end
 
+  def too_late_to(action, post)
+    !guardian.send("can_#{action}?", post) && post.user_id == current_user.id && post.edit_time_limit_expired?
+  end
+
 end

spec/controllers/posts_controller_spec.rb

@@ -79,6 +79,16 @@ describe PostsController do
       let(:user) { log_in(:moderator) }
       let(:post) { Fabricate(:post, user: user, post_number: 2) }
 
+      it 'does not allow to destroy when edit time limit expired' do
+        Guardian.any_instance.stubs(:can_delete_post?).with(post).returns(false)
+        Post.any_instance.stubs(:edit_time_limit_expired?).returns(true)
+
+        xhr :delete, :destroy, id: post.id
+
+        response.status.should == 422
+        JSON.parse(response.body)['errors'].should include(I18n.t('too_late_to_edit'))
+      end
+
       it "raises an error when the user doesn't have permission to see the post" do
         Guardian.any_instance.expects(:can_delete?).with(post).returns(false)
         xhr :delete, :destroy, id: post.id
@@ -195,6 +205,16 @@ describe PostsController do
         }
       end
 
+      it 'does not allow to update when edit time limit expired' do
+        Guardian.any_instance.stubs(:can_edit?).with(post).returns(false)
+        Post.any_instance.stubs(:edit_time_limit_expired?).returns(true)
+
+        xhr :put, :update, update_params
+
+        response.status.should == 422
+        JSON.parse(response.body)['errors'].should include(I18n.t('too_late_to_edit'))
+      end
+
       it 'passes the image sizes through' do
         Post.any_instance.expects(:image_sizes=)
         xhr :put, :update, update_params