public void SimpleDequeues()
{
var queue = ImmutableQueue <int> .Empty
.Enqueue(1)
.Enqueue(2)
.Enqueue(3);
var r1 = Transactional.Dequeue <ImmutableQueue <int>, int>(ref queue);
r1.Should().Be(1);
var r2 = Transactional.Dequeue <ImmutableQueue <int>, int>(ref queue);
r2.Should().Be(2);
var r3 = Transactional.Dequeue <ImmutableQueue <int>, int>(ref queue);
r3.Should().Be(3);
Action r4 = () => Transactional.Dequeue <ImmutableQueue <int>, int>(ref queue);
r4.ShouldThrow <InvalidOperationException>();
}
