VanillaCSharpUnitTests.cs

public class VanillaCSharpUnitTests
{
    [Test]
    public void Inverter_ReturnSuccess_WhenChildFails()
    {
        var spy = new BehaviorSpy(() => Behavior.Status.Failure);
        var sut = new Inverter(spy);

        BehaviorTestHarness.RunToComplete(sut);

        Assert.AreEqual(Behavior.Status.Success, sut.CurrentStatus);
    }
}