AccountingNext/Schaad.Accounting.Tests/TransactionDatasetTestShould.cs

using Schaad.Accounting.Datasets;
using Schaad.Accounting.Models;
using Shouldly;

namespace Schaad.Accounting.Tests;

public class TransactionDatasetTestShould
{
    private static Account MakeAccount(string id) => new() { Id = id, Name = id, Currency = "CHF" };

    private static TransactionDataset MakeTransaction(Account origin, Account target, decimal value, decimal? fxRate = null) =>
        new(
            new Transaction
            {
                Id = Guid.NewGuid().ToString(),
                OriginAccountId = origin.Id,
                TargetAccountId = target.Id,
                Value = value,
                FxRate = fxRate,
                ValueDate = DateTime.Now,
                BookingDate = DateTime.Now
            },
            origin, target);

    [Fact]
    public void ReturnNegativeValueWhenAccountIsOrigin()
    {
        var checking = MakeAccount("chk");
        var groceries = MakeAccount("groc");
        var transaction = MakeTransaction(checking, groceries, value: 50m);

        transaction.GetValue(withFxRate: false, accountId: "chk").ShouldBe(-50m);
    }

    [Fact]
    public void ReturnPositiveValueWhenAccountIsTarget()
    {
        var checking = MakeAccount("chk");
        var groceries = MakeAccount("groc");
        var transaction = MakeTransaction(groceries, checking, value: 50m);

        transaction.GetValue(withFxRate: false, accountId: "chk").ShouldBe(50m);
    }

    [Fact]
    public void ApplyFxConversionBeforeApplyingSignWhenAccountIsOrigin()
    {
        var checking = MakeAccount("chk");
        var groceries = MakeAccount("groc");
        var transaction = MakeTransaction(checking, groceries, value: 100m, fxRate: 0.5m);

        transaction.GetValue(withFxRate: true, accountId: "chk").ShouldBe(-200m);
    }
}