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fix(eslint-plugin): [no-misused-promises] check contextual type #10042

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Merged
merged 4 commits into from
Sep 29, 2024

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yeonjuan
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codecov bot commented Sep 23, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.73%. Comparing base (385bedb) to head (107a125).
Report is 27 commits behind head on main.

Additional details and impacted files
@@            Coverage Diff             @@
##             main   #10042      +/-   ##
==========================================
+ Coverage   88.69%   88.73%   +0.04%     
==========================================
  Files         426      426              
  Lines       14829    14884      +55     
  Branches     4313     4328      +15     
==========================================
+ Hits        13153    13208      +55     
- Misses       1533     1534       +1     
+ Partials      143      142       -1     
Flag Coverage Δ
unittest 88.73% <100.00%> (+0.04%) ⬆️

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

Files with missing lines Coverage Δ
...ges/eslint-plugin/src/rules/no-misused-promises.ts 98.83% <100.00%> (+0.01%) ⬆️

... and 13 files with indirect coverage changes

Comment on lines 829 to 842
const contextualType = checker.getContextualTypeForArgumentAtIndex(
node,
index,
);
if (contextualType !== type) {
checkThenableOrVoidArgument(
checker,
node,
contextualType,
index,
thenableReturnIndices,
voidReturnIndices,
);
}
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[Bug] We should also do this both for arrays and tuples

declare function fn<T extends (...args: unknown[]) => unknown>(fn: T): void
fn<() => void>(async () => { }); // reported - ok

declare function tupleFn<T extends (...args: unknown[]) => unknown>(...fns: [T, string, T]): void
tupleFn<() => void>(async () => { }, 'foo', async () => { }); // not reported - bug

declare function arrayFn<T extends (...args: unknown[]) => unknown>(...fns: (T | string)[]): void
arrayFn<() => void>(async () => { }, 'foo', async () => { }); // not reported - bug

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@auvred Thanks for the detailed examples. fixed 707d787

fn: T,
) => T;
declare const useCallbackReturningVoid: typeof useCallback<ReturnsVoid>;
useCallbackReturningVoid(async () => {}); // correct
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Suggested change
useCallbackReturningVoid(async () => {}); // correct
useCallbackReturningVoid(async () => {});

nit :)

@auvred auvred added the awaiting response Issues waiting for a reply from the OP or another party label Sep 25, 2024
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LGTM, thanks!

@auvred auvred added 1 approval >=1 team member has approved this PR; we're now leaving it open for more reviews before we merge and removed awaiting response Issues waiting for a reply from the OP or another party labels Sep 29, 2024
@JoshuaKGoldberg JoshuaKGoldberg merged commit b36d524 into typescript-eslint:main Sep 29, 2024
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Bug: no-misused-promises ignores conversion of Promise to void for generic higher-order-functions with fixed type parameter
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