public void EmployeeValidator_ShouldHaveRules()
{
var employeeValidator = new EmployeeValidator();
employeeValidator.ShouldHaveValidationErrorFor(v => v.FirstName, null as string);
employeeValidator.ShouldHaveValidationErrorFor(v => v.PersonType, Domain.Enums.PersonType.Dependent);
employeeValidator.ShouldHaveChildValidator(v => v.Dependents, typeof(DependentValidator));
}