upload tags report: add controller test (#3975).

test/functional/reports_controller_test.rb

@@ -6,9 +6,7 @@ class ReportsControllerTest < ActionDispatch::IntegrationTest
       @mod = create(:mod_user)
       @users = FactoryBot.create_list(:contributor_user, 2)
       @posts = @users.map do |u|
-        as(u) do
+        create(:post, uploader: u)
-          create(:post)
-        end
       end
     end
 
@@ -25,5 +23,12 @@ class ReportsControllerTest < ActionDispatch::IntegrationTest
         assert_response :success
       end
     end
+
+    context "upload_tags action" do
+      should "render" do
+        get reports_upload_tags_path(user_id: @users.first)
+        assert_response :success
+      end
+    end
   end
 end