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using System;
using AutoFixture;
using Shouldly;
using Xunit;
namespace EventSourcing.Demo
{
public class WarehouseProductAggregateRootTests : AggregateTests<WarehouseProduct>
{
private readonly Fixture _fixture;
private readonly string _sku = "abc123";
private readonly int _initialQuantity;
public WarehouseProductAggregateRootTests() : base(new WarehouseProduct("abc123"))
{
_fixture = new Fixture();
_fixture.Customizations.Add(new Int32SequenceGenerator());
_initialQuantity = (int)_fixture.Create<uint>();
}
[Fact]
public void ShipProductShouldRaiseProductShipped()
{
Given(new ProductReceived(_sku, _initialQuantity, DateTime.UtcNow));
var quantityToShip = _fixture.Create<int>();
When(x => x.ShipProduct(quantityToShip));
Then<ProductShipped>(
x => x.Quantity.ShouldBe(quantityToShip),
x => x.Sku.ShouldBe(_sku),
x => x.EventType.ShouldBe("ProductShipped"));
}
[Fact]
public void ShipProductShouldThrowIfNoQuantityOnHand()
{
Given();
Throws<InvalidDomainException>(
x => x.ShipProduct(1),
x => x.Message.ShouldBe("Cannot Ship to a negative Quantity on Hand."));
}
[Fact]
public void ReceiveProductShouldRaiseProductReceived()
{
Given(new ProductReceived(_sku, _initialQuantity, DateTime.UtcNow));
var quantityToReceive = _fixture.Create<int>();
When(x => x.ReceiveProduct(quantityToReceive));
Then<ProductReceived>(
x => x.Quantity.ShouldBe(quantityToReceive),
x => x.Sku.ShouldBe(_sku),
x => x.EventType.ShouldBe("ProductReceived"));
}
[Fact]
public void AdjustInventoryShouldRaiseProductAdjusted()
{
Given(new ProductReceived(_sku, _initialQuantity, DateTime.UtcNow));
var quantityToAdjust = _fixture.Create<int>();
var reason = _fixture.Create<string>();
When(x => x.AdjustInventory(quantityToAdjust, reason));
Then<InventoryAdjusted>(
x => x.Quantity.ShouldBe(quantityToAdjust),
x => x.Sku.ShouldBe(_sku),
x => x.Reason.ShouldBe(reason),
x => x.EventType.ShouldBe("InventoryAdjusted"));
}
[Fact]
public void AdjustInventoryShouldThrowIfNoQuantityOnHand()
{
Given();
var reason = _fixture.Create<string>();
Throws<InvalidDomainException>(
x => x.AdjustInventory(-1, reason),
x => x.Message.ShouldBe("Cannot adjust to a negative Quantity on Hand."));
}
}
}
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