public void given_employee_with_long_firstname_and_lastname_when_validating_should_return_error_about_full_name_being_too_long()
{
var employee = new Employee
{
FirstName = "ToddMeinershagenToddMeinershagenToddMeinershagen",
LastName = "ToddMeinershagenToddMeinershagenToddMeinershagen"
};
var results = new List<ValidationResult>();
employee.TryValidate(results)
.Should().BeFalse();
results.Should()
.Contain(x => x.ErrorMessage == "The full name must not be longer than 100 characters.");
}