'Test the retrieval of a specific transaction'

@blocking_call_on_reactor_thread
def test_get_specific_transaction(self):

    transaction_id = TransactionId(TraderId('0'), TransactionNumber(4))
    self.assertIsNone(self.database.get_transaction(transaction_id))
    self.database.add_transaction(self.transaction1)
    self.assertIsNotNone(self.database.get_transaction(transaction_id))
