Rspec, stub method and return a prefined value

I want to test this destroy action:

  def destroy
   @comment = Comment.find(params[:id])
   @comment_id = @comment.id
   if @comment.delete_permission(current_user.id)
     @remove_comment = true
     @comment.destroy
   else
     @remove_comment = false
     head :forbidden
   end
 end

My spec is this:

    describe "DELETE 'destroy'" do
      describe 'via ajx' do
        it "should be successful if permission true" do
          comment = Comment.stub(:find).with(37).and_return @comment
          comment.should_receive(:delete_permission).with(@user.id).and_return true
          comment.should_receive(:destroy)

          delete 'destroy', :id => 37
        end
      end
    end

I always get:

comment.should_receive....
expected: 1 time
received: 0 times

Why :delete_permission is never called? Do you have any suggestion on how t开发者_C百科o test it?

You're telling Comment.find to return @comment, but you never set the delete_permission expectation on that object; you set it on the value returned by the stub call, the comment local variable.

Try this:

# As Jimmy Cuadra notes, we have no idea what you've assigned to @comment
# But if you're not doing anything super weird, this should work
@comment.should_receive(:delete_permission).with(@user.id).and_return(true)
@comment.should_receive(:destroy)

Comment.stub(:find).with(37).and_return(@comment)