Scenario to test Onfailure() method of ApiFutures callback.

[SaikumarM]

Hi Team,
We are new to Gcp bigquery and started implementing storage API stream writer to ingest data to BQ in our project, we want to test API before pushing to production. we need a scenario to test onfailure() method of 
when we are calling Apifuture.callback() method when appending the data to stream.
please let us know how we can achieve this.