require 'rails_helper' RSpec.describe UserAssignment, type: :model do it 'should be of class UserAssignment' do expect(subject.class).to eq UserAssignment end describe 'Database table' do it { should have_db_column :assignable_type } it { should have_db_column :assignable_id } it { should have_db_column :user_id } it { should have_db_column :user_role_id } it { should have_db_column :assigned_by_id } it { should have_db_column :created_at } it { should have_db_column :updated_at } end describe 'Relations' do it { should belong_to :assignable } it { should belong_to :user } it { should belong_to :user_role } it { should belong_to(:assigned_by).class_name('User').optional } end end