using Xunit.Abstractions;

namespace UnitTests_Parallelizable.ApplicationTests.RunnableTests;

/// <summary>
///     Tests for RunnableSessionToken class.
/// </summary>
public class RunnableSessionTokenTests (ITestOutputHelper output)
{
    private readonly ITestOutputHelper _output = output;

    [Fact]
    public void RunnableSessionToken_Constructor_SetsRunnable ()
    {
        // Arrange
        Runnable<int> runnable = new ();

        // Act
        RunnableSessionToken token = new (runnable);

        // Assert
        Assert.NotNull (token.Runnable);
        Assert.Same (runnable, token.Runnable);
    }

    [Fact]
    public void RunnableSessionToken_Runnable_CanBeSetToNull ()
    {
        // Arrange
        Runnable<int> runnable = new ();
        RunnableSessionToken token = new (runnable);

        // Act
        token.Runnable = null;

        // Assert
        Assert.Null (token.Runnable);
    }

    [Fact]
    public void RunnableSessionToken_Dispose_ThrowsIfRunnableNotNull ()
    {
        // Arrange
        Runnable<int> runnable = new ();
        RunnableSessionToken token = new (runnable);

        // Act & Assert
        Assert.Throws<InvalidOperationException> (() => token.Dispose ());
    }

    [Fact]
    public void RunnableSessionToken_Dispose_SucceedsIfRunnableIsNull ()
    {
        // Arrange
        Runnable<int> runnable = new ();
        RunnableSessionToken token = new (runnable);
        token.Runnable = null;

        // Act & Assert - should not throw
        token.Dispose ();
    }
}