public void Given_valid_payment_when_validates_should_return_empty_collection()
{
var paymentEntity = PaymentEntityBuilder.CreateValidPayment();
var result = paymentValidationService.Validate(paymentEntity);
Assert.IsNotNull(result);
CollectionAssert.IsEmpty(result);
}
public void Given_payment_with_negative_amount_when_validates_should_return_error_message()
{
var paymentEntity = PaymentEntityBuilder.CreateValidPayment();
paymentEntity.Amount = -1;
var result = paymentValidationService.Validate(paymentEntity);
Assert.IsNotNull(result);
Assert.That(result.Count(), Is.EqualTo(1));
Assert.That(result.First(), Does.Contain("negative"));
}
