[#9] Added create reply test case.

spec/controllers/comments_controller_spec.rb

@@ -3,7 +3,9 @@
 RSpec.describe CommentsController, type: :controller do
   let(:user) { create(:user) }
   let(:article) { create(:article, user: user) }
+  let(:parent_comment) { create(:comment, article: article, user: user) }
   let(:comment_params) { {text: "This is a test comment"} }
+  let(:reply_params) { {text: "This is a test reply", parent_id: parent_comment.id} }
 
   it "should not create comment when not logged in" do
     expect {
@@ -30,6 +32,14 @@
       }.by(1)
     end
 
+    it "should create a reply to a comment" do
+      parent_comment
+      expect {
+        post :create, params: {article_id: article.id, comment: reply_params}
+      }.to change { Comment.count }.by(1)
+      expect(Comment.last.parent_id).to eq(parent_comment.id)
+    end
+
     it "should redirect to article after comment creation" do
       expect(post(:create, params: {article_id: article.id, comment: comment_params})).to redirect_to article_path(article)
     end