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fix(eslint-plugin): [no-unnecessary-boolean-literal-compare] flag values of a type parameter with boolean type constraints #10474

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ronami
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@ronami ronami commented Dec 7, 2024

PR Checklist

Overview

This PR follows-up #10443 and reports on values with a boolean type parameter that are being compared to a boolean literal:

// fails
const test1: (someCondition: boolean) => void = someCondition => {
  if (someCondition === true) {}
};

// should fail
const test2: <T extends boolean>(someCondition: T) => void = someCondition => {
  if (someCondition === true) {}
};

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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!


🙏 Please, if you or your company is finding typescript-eslint valuable, help us sustain the project by sponsoring it transparently on https://opencollective.com/typescript-eslint.

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codecov bot commented Dec 7, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 86.78%. Comparing base (cb0ef9c) to head (60e677a).
Report is 8 commits behind head on main.

Additional details and impacted files
@@           Coverage Diff           @@
##             main   #10474   +/-   ##
=======================================
  Coverage   86.77%   86.78%           
=======================================
  Files         444      445    +1     
  Lines       15335    15356   +21     
  Branches     4468     4472    +4     
=======================================
+ Hits        13307    13326   +19     
- Misses       1673     1675    +2     
  Partials      355      355           
Flag Coverage Δ
unittest 86.78% <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
...rc/rules/no-unnecessary-boolean-literal-compare.ts 97.46% <100.00%> (ø)

... and 12 files with indirect coverage changes

@ronami ronami marked this pull request as ready for review December 7, 2024 19:34
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@JoshuaKGoldberg JoshuaKGoldberg merged commit eaae68c into typescript-eslint:main Dec 14, 2024
62 checks passed
@ronami ronami deleted the no-unnecessary-boolean-literal-compare-report-constrained-type-parameters branch December 14, 2024 20:14
renovate bot added a commit to mmkal/eslint-plugin-mmkal that referenced this pull request Dec 16, 2024
##### [v8.18.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8181-2024-12-16)

##### 🩹 Fixes

-   **scope-manager:** visit params decorator before nest scope ([#10475](typescript-eslint/typescript-eslint#10475))
-   **eslint-plugin:** \[no-unnecessary-condition] better message when comparing between literal types ([#10454](typescript-eslint/typescript-eslint#10454))
-   **eslint-plugin:** use consistent naming for asserting types and casting values ([#10472](typescript-eslint/typescript-eslint#10472))
-   **eslint-plugin:** \[no-unnecessary-boolean-literal-compare] flag values of a type parameter with boolean type constraints ([#10474](typescript-eslint/typescript-eslint#10474))
-   **eslint-plugin:** handle string like index type ([#10460](typescript-eslint/typescript-eslint#10460))
-   **eslint-plugin:** \[no-unnecessary-template-expression] don't report when an expression includes comment ([#10444](typescript-eslint/typescript-eslint#10444))

##### ❤️ Thank You

-   Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger)
-   Ronen Amiel
-   YeonJuan [@yeonjuan](https://github.com/yeonjuan)

You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website.
renovate bot added a commit to andrei-picus-tink/auto-renovate that referenced this pull request Dec 16, 2024
| datasource | package                          | from   | to     |
| ---------- | -------------------------------- | ------ | ------ |
| npm        | @typescript-eslint/eslint-plugin | 8.18.0 | 8.18.1 |
| npm        | @typescript-eslint/parser        | 8.18.0 | 8.18.1 |


## [v8.18.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8181-2024-12-16)

##### 🩹 Fixes

-   **scope-manager:** visit params decorator before nest scope ([#10475](typescript-eslint/typescript-eslint#10475))
-   **eslint-plugin:** \[no-unnecessary-condition] better message when comparing between literal types ([#10454](typescript-eslint/typescript-eslint#10454))
-   **eslint-plugin:** use consistent naming for asserting types and casting values ([#10472](typescript-eslint/typescript-eslint#10472))
-   **eslint-plugin:** \[no-unnecessary-boolean-literal-compare] flag values of a type parameter with boolean type constraints ([#10474](typescript-eslint/typescript-eslint#10474))
-   **eslint-plugin:** handle string like index type ([#10460](typescript-eslint/typescript-eslint#10460))
-   **eslint-plugin:** \[no-unnecessary-template-expression] don't report when an expression includes comment ([#10444](typescript-eslint/typescript-eslint#10444))

##### ❤️ Thank You

-   Kirk Waiblinger [@kirkwaiblinger](https://github.com/kirkwaiblinger)
-   Ronen Amiel
-   YeonJuan [@yeonjuan](https://github.com/yeonjuan)

You can read about our [versioning strategy](https://main--typescript-eslint.netlify.app/users/versioning) and [releases](https://main--typescript-eslint.netlify.app/users/releases) on our website.
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