FireStore Emulator #62
Description
One type of test is called integration testing, which observes how separate systems interact. Specifically, how ServiceA may interact with ServiceB, like an API calling a DB to update an entry.
For databases, we use 'mocking' which starts an instance of the db locally and gives it fake data. The tests will start a server and run operations between server and DB, and verify that the results are what was expected.
FireStore doesn't have a way to start a local instance. Instead, it provides an emulator to use. Figure out a way to use the FireStore emulator for integration tests. Assume the FireStore wrapper (which should reference the emulated DB) and the backend application are in a docker container, and the tests call endpoints on the server which interact with FireStore.
Your task is to do research on the FireStore emulator and propose a plan for how to mock FireStore data to be used in an integration test.