using ZB.MOM.WW.ScadaBridge.SiteRuntime.Scripts;

namespace ZB.MOM.WW.ScadaBridge.SiteRuntime.Tests.Scripts;

public class TriggerEvalGateLifecycleTests
{
    /// <summary>Verifies that the shared gate is process-owned and remains usable after a caller disposes it.</summary>
    /// <returns>A task that represents the asynchronous operation.</returns>
    [Fact]
    public async Task SharedGate_IsProcessOwnedAndRemainsUsableAfterCallerDisposes()
    {
        var gate = TriggerEvalGate.Shared(new SiteRuntimeOptions());
        gate.Dispose();
        Assert.Same(gate, TriggerEvalGate.Shared(new SiteRuntimeOptions()));
        using var deadline = new CancellationTokenSource(TimeSpan.FromSeconds(5));
        await gate.WaitAsync(deadline.Token);
        gate.Release();
    }

    /// <summary>Verifies that an owned gate is disposed by its caller.</summary>
    [Fact]
    public void OwnedGate_IsDisposedByCaller()
    {
        var gate = new TriggerEvalGate(1);
        gate.Dispose();
        Assert.Throws<ObjectDisposedException>(() => { _ = gate.WaitAsync(CancellationToken.None); });
    }
}