public void subscription_can_be_added_ok() { var channel = Substitute.For <ITcpChannel>(); var transactionManager = Substitute.For <ITransactionManager>(); var client = Substitute.For <IStompClient>(); var subscription = new Subscription(client, "abc"); var sut = new StompClient(channel, transactionManager); sut.AddSubscription(subscription); var actual = sut.SubscriptionExists("abc"); actual.Should().BeTrue(); }