public void Test_disconnect_all(bool retry)
        {
            // Arrange
            var mockProxy = new Mock <ITopicBrokerClientProxy>();

            _mockClientManager.SetupGet(c => c.All).Returns(mockProxy.Object);
            // Act
            _messageHub.DisconnectAll(retry);

            // Assert
            mockProxy.Verify(m => m.serverOrderedDisconnect(retry));
        }