notebook/test/models/session_test.rb

require 'test_helper'

class SessionTest < ActiveSupport::TestCase
  test "session not valid without a username" do
    session = sessions(:one)
    session.username = nil
    
    refute session.valid?, "Session username is not being validated for presence"
  end
  
  test "session not valid without a password" do
    session = sessions(:one)
    session.password = nil
    
    refute session.valid?, "Session password is not being validated for presence"
  end
  
  test "session fixture assumptions" do
    assert_not_nil sessions(:one), "Sessions fixture :one is not available"
    assert sessions(:one).valid?, "Sessions fixture :one is not a valid session"
  end
end