testing application model

test/models/application_test.rb

 require 'test_helper'
 
 class ApplicationTest < ActiveSupport::TestCase
-  # test "the truth" do
-  #   assert true
-  # end
+  should belong_to :user
+  should validate_presence_of(:domain)
+  should validate_presence_of(:application_id)
 end

test/models/user_test.rb

@@ -51,6 +51,7 @@ class UserTest < ActiveSupport::TestCase
   should have_many :shares
   should have_many :follows
   should have_many :reviews
+  should have_many :applications
 
   test 'an user can follow another user' do
     john = users(:john)