przygody-pana-cegly/progression.tests/AttemptTests.cs

namespace Mr.BrickAdventures.Progression.Tests;

public class AttemptTests
{
    [Fact]
    public void An_attempt_cannot_die_twice()
    {
        // Overlapping hazards in a kill zone, or a hazard re-firing during the two seconds before
        // DeathScreen reloads the scene, must not cost two lives. The Attempt refuses the second
        // death, so no caller has to remember to guard against it.
        var attempt = new Attempt(LevelId.Of("village_1"));

        Assert.True(attempt.TryEndInDeath());
        Assert.False(attempt.TryEndInDeath());
        Assert.Equal(AttemptOutcome.Died, attempt.Outcome);
    }

    [Fact]
    public void An_attempt_that_died_cannot_then_be_cleared()
    {
        var attempt = new Attempt(LevelId.Of("village_1"));
        attempt.TryEndInDeath();

        Assert.False(attempt.TryEndInCompletion());
        Assert.Equal(AttemptOutcome.Died, attempt.Outcome);
    }

    [Fact]
    public void An_attempt_that_was_cleared_cannot_then_die()
    {
        // The reverse of the above. Together these say a terminal outcome is final, which is what
        // lets both ExitDoorComponent and the console request completion without banking twice.
        var attempt = new Attempt(LevelId.Of("village_1"));
        attempt.TryEndInCompletion();

        Assert.False(attempt.TryEndInDeath());
        Assert.Equal(AttemptOutcome.Cleared, attempt.Outcome);
    }

    [Fact]
    public void Coins_found_after_the_attempt_ended_do_not_count()
    {
        // The player node survives for two seconds after death while DeathScreen counts down, so a
        // coin's Area2D can still fire. That is a real event rather than an error, and it must not
        // enlarge a ledger that is already settled.
        var attempt = new Attempt(LevelId.Of("village_1"));
        attempt.RecordCoinsFound(Coins.Of(3));
        attempt.RecordCoinsFound(Coins.Of(2));
        attempt.TryEndInDeath();

        attempt.RecordCoinsFound(Coins.Of(100));

        Assert.Equal(Coins.Of(5), attempt.CoinsFound);
    }

    [Fact]
    public void A_purchase_after_the_attempt_ended_is_refused()
    {
        var attempt = new Attempt(LevelId.Of("village_1"));
        attempt.TryEndInDeath();

        var recorded = attempt.TryRecordPurchase(SkillId.Of("brick_throw"), SkillLevel.Of(1), Coins.Of(10));

        Assert.False(recorded);
        Assert.Equal(Coins.Zero, attempt.CoinsSpent);
        Assert.Empty(attempt.SkillsBought);
    }

    [Fact]
    public void Spending_more_than_was_found_this_attempt_is_recorded_not_rejected()
    {
        // The shortfall is drawn from the Bank when the Attempt is committed. Rejecting it here
        // would make the ledger enforce a rule it cannot see — affordability spans both scopes.
        var attempt = new Attempt(LevelId.Of("village_1"));
        attempt.RecordCoinsFound(Coins.Of(10));

        var recorded = attempt.TryRecordPurchase(SkillId.Of("magnetic"), SkillLevel.Of(1), Coins.Of(30));

        Assert.True(recorded);
        Assert.Equal(Coins.Of(10), attempt.CoinsFound);
        Assert.Equal(Coins.Of(30), attempt.CoinsSpent);
    }

    [Fact]
    public void Unlocking_then_upgrading_one_skill_records_the_level_it_ended_at()
    {
        // Both happen in the marketplace mid-Attempt. Commit applies one level per skill, so the
        // ledger keeps where it ended up, while the costs accumulate.
        var brickThrow = SkillId.Of("brick_throw");
        var attempt = new Attempt(LevelId.Of("village_1"));

        attempt.TryRecordPurchase(brickThrow, SkillLevel.Of(1), Coins.Of(10));
        attempt.TryRecordPurchase(brickThrow, SkillLevel.Of(2), Coins.Of(25));

        Assert.Equal(SkillLevel.Of(2), attempt.SkillsBought[brickThrow]);
        Assert.Equal(Coins.Of(35), attempt.CoinsSpent);
    }
}