public void TestEventTypeCreate()
        {
            // Arrange.
            var eventTypeInfo = new NameCommentStruct {
                Id = "123", Name = "TestEventType", Comment = "ForTest"
            };
            var dataServiceMock = new Mock <IDataService>();
            var service         = new DefaultSubscriptionsManager(dataServiceMock.Object, GetMockStatisticsService());

            // Act.
            service.CreateEventType(eventTypeInfo);

            // Assert.
            dataServiceMock.Verify(f => f.UpdateObject(It.Is <MessageType>(t => t.ID == eventTypeInfo.Id && t.Name == eventTypeInfo.Name && t.Description == eventTypeInfo.Comment)), Times.Once);
        }