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CorieW wants to merge 2 commits into from
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chore: improve V2 callable typing #266

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chore: improve V2 callable typing
CorieW May 13, 2025
c60dc8c
Merge branch 'master' into @invertase/improve-v2callable-typing
IzaakGough Jun 29, 2026
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2 changes: 1 addition & 1 deletion src/v2.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,7 @@ export type WrappedV2Function<T extends CloudEvent<unknown>> = (
) => any | Promise<any>;

export type WrappedV2CallableFunction<T> = (
data: CallableRequest
data: DeepPartial<CallableRequest>
Comment on lines 37 to +38

Copilot AI May 19, 2025

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Using DeepPartial<CallableRequest> may allow invalid or incomplete payloads at runtime. Consider documenting which fields remain required or introduce a narrower helper type for testing vs. production usage.

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@cabljac cabljac May 19, 2025

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I'm not sure about this either, see for example:

import { wrapV2 } from 'firebase-functions-test/lib/v2';
import { onCall } from 'firebase-functions/v2/https';

interface HelloResult { greeting: string; }

const stub = onCall<{}, HelloResult>((req) => {

  console.log('HTTP method:', req.rawRequest.method);

  return { greeting: `Hello!` };
});

// 2) Wrap it
const invoke = wrapV2(stub);

// 3) This should be a compile‐time error, but compiles fine under the PR:
invoke({
  data: {},   // TS should complain: “Property 'rawRequest' is missing” etc
});

The change makes this fine according to the typescript compilation, but at runtime of the test we'll get an error.

I feel like the library should build some defaults?

like here in v1 for event context:

https://github.com/firebase/firebase-functions-test/blob/master/src/v1.ts#L141

@taeold taeold May 19, 2025

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This is a great call. Instead of loosening the type, maybe we just need to provide sensible default so that user doesn't have to manually construct and pass callable context when invoking their v2 callable fn.

) => T | Promise<T>;

function isCallableV2Function<T extends CloudEvent<unknown>>(
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