require File.expand_path('../abstract_unit', __FILE__) class EmployeesGroup < ActiveRecord::Base end class TestValidations < ActiveSupport::TestCase fixtures :employees def test_delete_for_model_without_primary_key EmployeesGroup.create(employee_id: 1, group_id: 100) EmployeesGroup.create(employee_id: 2, group_id: 102) EmployeesGroup.create(employee_id: 3, group_id: 103) assert_equal(EmployeesGroup.all.size, 3) assert_raises(ActiveRecord::StatementInvalid) { EmployeesGroup.where(employee_id: 1).first.destroy } assert(EmployeesGroup.all.size == 3) end end