public void Is_invalid_when_associated_orders_exist()
{
var productID = 1;
var orderDataProxy = new Mock <IOrderDataProxy>();
orderDataProxy.Setup(p => p.GetByProduct(productID)).Returns(Enumerable.OfType <Order>(new[] { new Order() }));
var rule = new CanDeleteProductRule(productID, orderDataProxy.Object);
rule.Validate().IsValid.ShouldBe(false);
rule.ErrorMessage.ShouldNotBe(null);
}
public void Is_valid_when_no_associated_orders_exist()
{
var productID = 1;
var orderDataProxy = new Mock <IOrderDataProxy>();
orderDataProxy.Setup(p => p.GetByProduct(productID)).Returns(Enumerable.Empty <Order>());
var rule = new CanDeleteProductRule(productID, orderDataProxy.Object);
rule.Validate().IsValid.ShouldBe(true);
rule.ErrorMessage.ShouldBe(null);
}