@firebase/testing does not handle FieldValue.increment

[damonmaria]

Describe your environment

• Operating System version: MacOS 10.14.5
• firebase-admin version: 7.3.0
• @firebase/testing version: 0.9.4
• Firebase Product: firestore, emulator, testing

Describe the problem

When I try and use FieldValue.increment in an update or set when using @firebase/testing (with the Firestore emulator) I get:
FIRESTORE (6.0.2) INTERNAL ASSERTION FAILED: AsyncQueue is already failed: Error: FIRESTORE (6.0.2) INTERNAL ASSERTION FAILED: Transform results missing for TransformMutation.

Relevant Code:

This produces the error:

await siteDoc.ref.update({ field: firebase.firestore.FieldValue.increment(1) })

If I don't use increment then it works:

await siteDoc.ref.update({ field: 1 })

I understand this could be the emulator not being up to date but thought I'd post here first.

[wilhuff]

This is a limitation of the emulator. Support for transformations (increments and array union/remove) is coming.

What you’re seeing here is that unfortunately, the emulator currently only partially implements the protocol for these operations and it's causing the SDK to panic.

@ryanpbrewster

[ryanpbrewster]

Just confirmed that this is fixed by firebase/firebase-tools#1318, which will go out with the next CLI release.