public void Should_Fail_To_Send_Email_Because_Email_Is_Invalid()
{
// arrange
const string errorMessage = "message";
var email = new Email();
var validatorRunner = new Mock <IValidatorRunner>();
var errorSummary = new ErrorSummary();
validatorRunner.Setup(v => v.IsValid(It.IsAny <Email>())).Returns(false);
validatorRunner.Setup(v => v.GetErrorSummary(It.IsAny <Email>())).Returns(errorSummary);
errorSummary.RegisterErrorMessage(errorMessage, errorMessage);
// act
var service = new EmailSenderService(validatorRunner.Object);
TestDelegate act = () => service.Send(email);
// assert
Assert.That(act, Throws.InstanceOf <ValidationException>().With.Property("ValidationErrorMessages").EqualTo(new[] { errorMessage }));
}