[Python] Is it possible to test concurrent HTTP calls and Firestore side effects in Firebase...

My goal is to write tests that:

1. Simulate multiple concurrent HTTP POST requests to a cloud function endpoint (e.g., 2-3 identical webhooks arriving almost simultaneously).
2. Verify database side effects in Firestore (e.g., database write and updates).

What I have tried so far

1. 
   I have found testing documentation for js : https://firebase.google.com/docs/functions/unit-testing
   
   
2. 
   Tried testing on firebase emulator with little success since concurrency behaviour greatly differs from production:https://cloud.google.com/firestore/native/docs/emulator#transactions
   
   
3. 
   Unit test samples only involve js : https://github.com/firebase/functions-samples/tree/main?tab=readme-ov-file
   

Current Roadblock

Most documentation and examples are JavaScript-only, while my functions are in Python. I’m convinced that to properly test concurrency, I’ll need to:

1. Use a real GCP project (not just the emulator) to run integration tests that fire multiple simultaneous requests.

What I’m looking for

A Python testing approach or library that can help for generation 2 functions firebase:

• Mock/simulate multiple concurrent POST requests.
• Assert Firestore database state after execution.

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