namespace Domain.Tests;

/// <summary>Unit tests for the <see cref="OrderMoney"/> value object.</summary>
public class OrderMoneyTests
{
    [Fact]
    public void From_keeps_the_cents()
    {
        Assert.Equal(150_00, OrderMoney.From(150_00).Cents);
    }

    [Fact]
    public void Zero_is_valid()
    {
        Assert.Equal(0, OrderMoney.From(0).Cents);
    }

    [Fact]
    public void Negative_cents_are_rejected()
    {
        Assert.Throws<ArgumentOutOfRangeException>(() => OrderMoney.From(-1));
        Assert.Throws<ArgumentOutOfRangeException>(() => _ = (OrderMoney)(-1));   // conversion validates too
    }

    [Fact]
    public void Money_compares_by_value_not_reference()
    {
        Assert.Equal(OrderMoney.From(150_00), OrderMoney.From(150_00));
        Assert.NotEqual(OrderMoney.From(150_00), OrderMoney.From(151_00));
    }

    [Fact]
    public void Converting_back_to_cents_is_explicit()
    {
        var money = OrderMoney.From(150_00);

        Assert.Equal(150_00, (int)money);
        Assert.Equal(150_00, money.Cents);
    }

    [Fact]
    public void ToString_shows_the_cents()
    {
        Assert.Equal("15000", OrderMoney.From(150_00).ToString());
    }
}