public void ThenInMessageExistsSucceeded(string sharedId)
            {
                // Arrange
                InsertInMessageWithOperation(sharedId);

                using (DatastoreContext context = GetDataStoreContext())
                {
                    var repository = new DatastoreRepository(context);

                    // Act
                    bool result = repository.InMessageExists(m => m.EbmsMessageId == sharedId);

                    // Assert
                    Assert.True(result);
                }
            }