tests: add missing controller tests.

test/functional/explore/posts_controller_test.rb

@@ -4,10 +4,7 @@ module Explore
   class PostsControllerTest < ActionDispatch::IntegrationTest
     context "in all cases" do
       setup do
-        @user = create(:user)
-        as_user do
-          create(:post)
-        end
+        @post = create(:post)
       end
 
       context "#popular" do
@@ -17,6 +14,15 @@ module Explore
         end
       end
 
+      context "#curated" do
+        should "render" do
+          @builder = create(:builder_user)
+          @post.add_favorite!(@builder)
+          get curated_explore_posts_path
+          assert_response :success
+        end
+      end
+
       context "#searches" do
         should "render" do
           get searches_explore_posts_path