title: Mocking Bigquery for integration tests
body: <p>While other interfaces are relatively easy to mock in my Java integration tests, I couldn't find a proper way of mocking Bigquery.</p>
  
  <p>One possibility is to mock the layer I wrote on top of Bigquery itself, but I prefer mocking Bigquery in a more natural way. I'm looking for a limited, lightweight implementation, which allows defining the table contents, and supports queries using the standard API.
  Is there such a library? If not, what alternative approaches are recommended?</p>