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BB feat(eslint-plugin): [await-thenable] report invalid (non-promise) values passed to promise aggregator methods by ronami · Pull Request #11267 · typescript-eslint/typescript-eslint · GitHub
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feat(eslint-plugin): [await-thenable] report invalid (non-promise) values passed to promise aggregator methods #11267

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feat(eslint-plugin): [await-thenable] report invalid (non-promise) values passed to promise aggregator methods #11267

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@ronami ronami commented Jun 1, 2025

PR Checklist

Overview

This PR tackles #1804 and adjusts the rule to report on invalid (non-promise) input passed to promise aggregator methods (Promise.all, Promise.race, Promise.allSettled, and Promise.any):

declare const x: number[];

// Unexpected iterator of non-Promise (non-"Thenable") values passed to promise aggregator.
Promise.all(x);

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Thanks for the PR, @ronami!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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@ronami ronami changed the title feat(await-thenable): report invalid (non-promise) values passed to promise aggregator methods feat(eslint-plugin): [await-thenable] report invalid (non-promise) values passed to promise aggregator methods Jun 1, 2025
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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.85%. Comparing base (d19c9f3) to head (bcf18dc).

Additional details and impacted files 
@@            Coverage Diff             @@
##             main   #11267      +/-   ##
==========================================
+ Coverage   90.84%   90.85%   +0.01%     
==========================================
  Files         501      502       +1     
  Lines       50919    51013      +94     
  Branches     8386     8405      +19     
==========================================
+ Hits        46256    46350      +94     
  Misses       4648     4648              
  Partials       15       15
Flag Coverage Δ
unittest 90.85% <100.00%> (+0.01%) ⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines Coverage Δ
packages/eslint-plugin/src/rules/await-thenable.ts 100.00% <100.00%> (ø)
...slint-plugin/src/util/isPromiseAggregatorMethod.ts 100.00% <100.00%> (ø)
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It would be great if a test case for for Promise.all(x) where x is Array<Array<Promise<T>> could be added, as this the bug that we recently had in #11257.

@ronami ronami marked this pull request as ready for review June 24, 2025 21:04
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[await-thenable] warn against passing non-promise values to promise aggregators (Promise.all, Promise.allSettled, Promise.race)
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