skill-assessment-app/test/models/candidate_test.rb

require 'test_helper'

class CandidateTest < ActiveSupport::TestCase
  test "test_hash is auto generated" do
    candidate = Candidate.create(name: 'new name',
                                 email: 'test@mailinator.com',
                                 experience: '0-3',
                                 quiz_id: quizzes(:fed).id)

    assert candidate.test_hash.present?
  end
end