public void TestSink_Probe_ToStrict_when_subscription_was_already_obtained()
{
var p = Source.From(Enumerable.Range(1, 4)).RunWith(this.SinkProbe<int>(), _materializer);
p.ExpectSubscription();
p.ToStrict(TimeSpan.FromMilliseconds(300)).Should().Equal(1, 2, 3, 4);
}