maraphon-app/tests/Marathon.Domain.Tests/Entities/BetTests.cs

using FluentAssertions;
using Marathon.Domain.Entities;
using Marathon.Domain.Enums;
using Marathon.Domain.ValueObjects;

namespace Marathon.Domain.Tests.Entities;

public sealed class BetTests
{
    private static readonly BetScope MatchScope = Marathon.Domain.ValueObjects.MatchScope.Instance;
    private static readonly OddsRate SampleRate = new(1.85m);
    private static readonly OddsValue SampleValue = new(3.5m);

    // ── Win bets ──────────────────────────────────────────────────────────────

    [Theory]
    [InlineData(Side.Side1)]
    [InlineData(Side.Side2)]
    public void Constructor_CreatesWinBet_WhenSideIs1Or2AndValueIsNull(Side side)
    {
        var bet = new Bet(MatchScope, BetType.Win, side, null, SampleRate);
        bet.Type.Should().Be(BetType.Win);
        bet.Side.Should().Be(side);
        bet.Value.Should().BeNull();
    }

    [Theory]
    [InlineData(Side.Draw)]
    [InlineData(Side.Less)]
    [InlineData(Side.More)]
    public void Constructor_ThrowsArgumentException_WhenWinBetHasInvalidSide(Side side)
    {
        var act = () => new Bet(MatchScope, BetType.Win, side, null, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("side");
    }

    [Fact]
    public void Constructor_ThrowsArgumentException_WhenWinBetHasNonNullValue()
    {
        var act = () => new Bet(MatchScope, BetType.Win, Side.Side1, SampleValue, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("value");
    }

    // ── Draw bets ─────────────────────────────────────────────────────────────

    [Fact]
    public void Constructor_CreatesDrawBet_WhenSideIsDrawAndValueIsNull()
    {
        var bet = new Bet(MatchScope, BetType.Draw, Side.Draw, null, SampleRate);
        bet.Type.Should().Be(BetType.Draw);
        bet.Side.Should().Be(Side.Draw);
        bet.Value.Should().BeNull();
    }

    [Theory]
    [InlineData(Side.Side1)]
    [InlineData(Side.Side2)]
    [InlineData(Side.Less)]
    [InlineData(Side.More)]
    public void Constructor_ThrowsArgumentException_WhenDrawBetHasInvalidSide(Side side)
    {
        var act = () => new Bet(MatchScope, BetType.Draw, side, null, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("side");
    }

    [Fact]
    public void Constructor_ThrowsArgumentException_WhenDrawBetHasNonNullValue()
    {
        var act = () => new Bet(MatchScope, BetType.Draw, Side.Draw, SampleValue, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("value");
    }

    // ── WinFora bets ──────────────────────────────────────────────────────────

    [Theory]
    [InlineData(Side.Side1)]
    [InlineData(Side.Side2)]
    public void Constructor_CreatesWinForaBet_WhenSideIs1Or2AndValueIsNonNull(Side side)
    {
        var bet = new Bet(MatchScope, BetType.WinFora, side, SampleValue, SampleRate);
        bet.Type.Should().Be(BetType.WinFora);
        bet.Value.Should().NotBeNull();
    }

    [Fact]
    public void Constructor_ThrowsArgumentException_WhenWinForaBetHasNullValue()
    {
        var act = () => new Bet(MatchScope, BetType.WinFora, Side.Side1, null, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("value");
    }

    [Theory]
    [InlineData(Side.Draw)]
    [InlineData(Side.Less)]
    [InlineData(Side.More)]
    public void Constructor_ThrowsArgumentException_WhenWinForaBetHasInvalidSide(Side side)
    {
        var act = () => new Bet(MatchScope, BetType.WinFora, side, SampleValue, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("side");
    }

    // ── Total bets ────────────────────────────────────────────────────────────

    [Theory]
    [InlineData(Side.Less)]
    [InlineData(Side.More)]
    public void Constructor_CreatesTotalBet_WhenSideIsLessOrMoreAndValueIsNonNull(Side side)
    {
        var bet = new Bet(MatchScope, BetType.Total, side, SampleValue, SampleRate);
        bet.Type.Should().Be(BetType.Total);
        bet.Value.Should().NotBeNull();
    }

    [Fact]
    public void Constructor_ThrowsArgumentException_WhenTotalBetHasNullValue()
    {
        var act = () => new Bet(MatchScope, BetType.Total, Side.Less, null, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("value");
    }

    [Theory]
    [InlineData(Side.Side1)]
    [InlineData(Side.Side2)]
    [InlineData(Side.Draw)]
    public void Constructor_ThrowsArgumentException_WhenTotalBetHasInvalidSide(Side side)
    {
        var act = () => new Bet(MatchScope, BetType.Total, side, SampleValue, SampleRate);
        act.Should().Throw<ArgumentException>()
            .WithParameterName("side");
    }

    // ── Null guards ───────────────────────────────────────────────────────────

    [Fact]
    public void Constructor_ThrowsArgumentNullException_WhenScopeIsNull()
    {
        var act = () => new Bet(null!, BetType.Win, Side.Side1, null, SampleRate);
        act.Should().Throw<ArgumentNullException>()
            .WithParameterName("scope");
    }

    [Fact]
    public void Constructor_ThrowsArgumentNullException_WhenRateIsNull()
    {
        var act = () => new Bet(MatchScope, BetType.Win, Side.Side1, null, null!);
        act.Should().Throw<ArgumentNullException>()
            .WithParameterName("rate");
    }

    // ── Immutability ──────────────────────────────────────────────────────────

    [Fact]
    public void Bet_IsImmutable_NoSettablePublicProperties()
    {
        var betType = typeof(Bet);
        var settableProperties = betType.GetProperties()
            .Where(p => p.CanWrite && p.GetSetMethod(nonPublic: false) is not null)
            .ToList();

        settableProperties.Should().BeEmpty(
            "Bet is a sealed record with only get-only properties — immutability is required.");
    }
}