如何在xunit中测试事件被引发？

using System;
using Xunit;

public class EventPublisher
{
    public event EventHandler EventRaised;

    public void PublishEvent()
    {
        EventRaised?.Invoke(this, EventArgs.Empty);
    }
}

public class EventTests
{
    [Fact]
    public void EventRaisedTest()
    {
        // Arrange
        var publisher = new EventPublisher();
        bool eventRaised = false;

        publisher.EventRaised += (sender, args) =>
        {
            eventRaised = true;
        };

        // Act
        publisher.PublishEvent();

        // Assert
        Assert.True(eventRaised);
    }
}