WildPlumProject/WildPlumTests/DataModelTests/OrderProductDataModelTests.cs

using WildPlumContracts.DataModels;
using WildPlumContracts.Exceptions;

namespace WildPlumTests.DataModelTests;

[TestFixture]
public class OrderProductDataModelTests
{
    [Test]
    public void Validate_ThrowsException_WhenProductIdIsNullOrEmpty()
    {
        Assert.Multiple(() =>
        {
            Assert.That(() => CreateDataModel(null, Guid.NewGuid().ToString(), 1).Validate(),
                Throws.TypeOf<ValidationException>());

            Assert.That(() => CreateDataModel(string.Empty, Guid.NewGuid().ToString(), 1).Validate(),
                Throws.TypeOf<ValidationException>());
        });
    }

    [Test]
    public void Validate_ThrowsException_WhenProductIdIsNotGuid()
    {
        Assert.That(() => CreateDataModel("invalid-guid", Guid.NewGuid().ToString(), 1).Validate(),
            Throws.TypeOf<ValidationException>());
    }

    [Test]
    public void Validate_ThrowsException_WhenOrderIdIsNullOrEmpty()
    {
        Assert.Multiple(() =>
        {
            Assert.That(() => CreateDataModel(Guid.NewGuid().ToString(), null, 1).Validate(),
                Throws.TypeOf<ValidationException>());

            Assert.That(() => CreateDataModel(Guid.NewGuid().ToString(), string.Empty, 1).Validate(),
                Throws.TypeOf<ValidationException>());
        });
    }

    [Test]
    public void Validate_ThrowsException_WhenOrderIdIsNotGuid()
    {
        Assert.That(() => CreateDataModel(Guid.NewGuid().ToString(), "invalid-guid", 1).Validate(),
            Throws.TypeOf<ValidationException>());
    }

    [Test]
    public void Validate_ThrowsException_WhenCountIsLessThanOrEqualToZero()
    {
        Assert.Multiple(() =>
        {
            Assert.That(() => CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), 0).Validate(),
                Throws.TypeOf<ValidationException>());

            Assert.That(() => CreateDataModel(Guid.NewGuid().ToString(), Guid.NewGuid().ToString(), -1).Validate(),
                Throws.TypeOf<ValidationException>());
        });
    }

    [Test]
    public void AllFieldsAreCorrectTest()
    {
        var productId = Guid.NewGuid().ToString();
        var orderId = Guid.NewGuid().ToString();
        var count = 5;

        var orderProduct = CreateDataModel(productId, orderId, count);

        Assert.That(() => orderProduct.Validate(), Throws.Nothing);
        Assert.Multiple(() =>
        {
            Assert.That(orderProduct.ProductId, Is.EqualTo(productId));
            Assert.That(orderProduct.OrderId, Is.EqualTo(orderId));
            Assert.That(orderProduct.Count, Is.EqualTo(count));
        });
    }

    private static OrderProductDataModel CreateDataModel(string? productId, string? orderId, int count) =>
        new(productId!, orderId!, count);
}