Mocking Bigquery for integration test

Question

I'm using https://github.com/googleapis/google-cloud-go to interact with GCP Bigquery to fetch some data.

I want to write some tests for my code. for the unit testing, it's easy because I can mock my repository ( data layer) and return what I expected for.

I'm looking for writing an integration test, if it was just basic HTTP I could write a httptest server and return some dummy ( fake) data. but this library is using gRPC to communicate with GCP Bigquery.

I'm wondering how I can write an integration test for GCP Bigquery in Golang.

let's keep it in the simplest way and just provide the integration part for Query a table in a dataset and read data.

Answer 1

You can run dependency locally. Read : Docker container for Google BigQuery

You can write script for running tests and dependencies(BigQuery) in docker container

If you dont want to run test using docker you can use bigquery-emulator

Or just mock it Send your repository(data layer) as interface to your http server And then you run test use mock