launcher-next/tests/Launcher.Next.Tests/LocalParityEvidenceTests.cs

using System.Text.Json;
using Launcher.Next.App;
using Xunit;

namespace Launcher.Next.Tests;

public sealed class LocalParityEvidenceTests
{
    [Fact]
    public async Task EvidenceWriter_AtomicallyPublishesValidatedSchema()
    {
        var root = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N"));
        try
        {
            Directory.CreateDirectory(root);
            var path = await LocalParityLaunchService.WriteEvidenceAsync(root, new { schemaVersion = 4, state = "PACKAGE_LOAD_VERIFIED" }, CancellationToken.None);
            Assert.True(File.Exists(path));
            using var document = JsonDocument.Parse(await File.ReadAllTextAsync(path));
            Assert.Equal(4, document.RootElement.GetProperty("schemaVersion").GetInt32());
            Assert.False(File.Exists(path + ".tmp"));
        }
        finally { if (Directory.Exists(root)) Directory.Delete(root, recursive: true); }
    }

    [Fact]
    public async Task EvidenceWriter_ReplacesStaleTemporaryArtifact()
    {
        var root = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString("N"));
        try
        {
            Directory.CreateDirectory(root);
            await File.WriteAllTextAsync(Path.Combine(root, "controlled-local-parity-launch.json.tmp"), "stale");
            var path = await LocalParityLaunchService.WriteEvidenceAsync(root, new { schemaVersion = 4, terminalResult = "PACKAGE_LOAD_VERIFIED" }, CancellationToken.None);
            Assert.Contains("PACKAGE_LOAD_VERIFIED", await File.ReadAllTextAsync(path));
            Assert.False(File.Exists(path + ".tmp"));
        }
        finally { if (Directory.Exists(root)) Directory.Delete(root, recursive: true); }
    }
}