require 'rails_helper' describe PostReply do let(:topic) { Fabricate(:topic) } let(:post) { Fabricate(:post, topic: topic) } let(:other_post) { Fabricate(:post, topic: topic) } it { is_expected.to belong_to :post } it { is_expected.to belong_to :reply } context "validation" do it "should ensure that the posts belong in the same topic" do expect(PostReply.new(post: post, reply: other_post)).to be_valid other_topic = Fabricate(:topic) other_post.update_attributes!(topic_id: other_topic.id) other_post.reload post_reply = PostReply.new(post: post, reply: other_post) expect(post_reply).to_not be_valid expect(post_reply.errors[:base]).to include( I18n.t("activerecord.errors.models.post_reply.base.different_topic") ) end end end