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From Firebase DOCS:
Run functions locally
The Firebase CLI includes a Cloud Functions emulator which can emulate the following function types:
- HTTPS functions
- Callable functions
- Cloud Firestore functions
You can run functions locally to test them before deploying to production.
QUESTION
Is there a way to run cloud functions for Firebase Storage (ex: triggered by file upload) locally or do I need to actually deploy them for testing?
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You can run functions locally using either Function Frameworks or Cloud Native buildpacks. Function Frameworks are open-source libraries used within Cloud Functions to unmarshal incoming HTTP requests into language-specific function invocations.
The Firebase Local Emulator Suite is a set of advanced tools for developers looking to build and test apps locally using Cloud Firestore, Realtime Database, Cloud Storage for Firebase, Authentication, Firebase Hosting, Cloud Functions (beta), Pub/Sub (beta), and Firebase Extensions (beta).
firebaser here
Update: the Firebase Emulator Suite now also supports Cloud Storage. This includes uploads to emulated Cloud Storage triggering emulated Cloud Functions.
See the documentation for full details.
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Storage has been implemented in firebase tools 9.11.0. I just took it for a test run, and I found that functions running in the emulator are, indeed, triggered by uploads to the emulated storage.
https://github.com/firebase/firebase-tools/issues/1738#issuecomment-843256335
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