Resolves: #5689
Impact: minor
Type: test

This PR adds: an integration test file for orderByReferenceId query.

We test whether an order is successfully returned, given an orderReferenceId and a shopId. Here is the schema for this query. We test for logged-in and anonymous users (setLoggedInUser will fake as if your auth token is for that user).

Testing Instructions:

npm install --save-dev jest-cli
npm run lint
npm run test