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fix(eslint-plugin): [no-unnecessary-type-assertion] handle literal types#10523
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fix(eslint-plugin): [no-unnecessary-type-assertion] handle literal types#10523
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Thanks for the PR,@mdm317! 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 onhttps://opencollective.com/typescript-eslint. |
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codecovbot commentedDec 19, 2024 • edited
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Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@## main #10523 +/- ##======================================= Coverage 86.90% 86.91% ======================================= Files 446 446 Lines 15502 15509 +7 Branches 4516 4519 +3 =======================================+ Hits 13472 13479 +7 Misses 1675 1675 Partials 355 355
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LGTM! Just requesting changes on naming and removing thenoFormat. Thanks!
packages/eslint-plugin/tests/rules/no-unnecessary-type-assertion.test.ts OutdatedShow resolvedHide resolved
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packages/eslint-plugin/src/rules/no-unnecessary-type-assertion.ts OutdatedShow resolvedHide resolved
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🪨
ronami left a comment• edited
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Looking great! Just requesting minor changes around testing 🏆
Edit: I'm not sure if it's too fringe, but I did see one regression with thereadonly modifier (main branch playground link,deploy preview playground link).
| constwouldSameTypeBeInferred= | ||
| castType.isLiteral()|| | ||
| isAssertionTypeTemplateLiteral|| |
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[Testing]: No tests fail if this is omitted (isAssertionTypeTemplateLiteral ||), let's simplify or add a test case?
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Thanks for the review. I think it would be better to simplify logic for this issue.
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Thanks 👍
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ronami commentedJan 6, 2025
This was on my mind, and I missed it when I reviewed the PR yesterday, but I did notice this one regression (playground link,deploy preview playground link): conststate:"expired"|"pending"="pending";functionmain(){return{// correctly reported previously, now doesn't reporttype:stateas"expired"|"pending"};} I'll open a separate issue about it. |
JoshuaKGoldberg commentedJan 6, 2025 • edited
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Ah, it's both class properties and object properties: classExample{type=stateas'expired'|'pending'} I'm going to go ahead and revert this before it gets into the weekly release today - I think the logic will need to be more intricate. |
##### [v8.19.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8191-2025-01-06)##### 🩹 Fixes- **eslint-plugin:** \[no-unnecessary-type-assertion] handle literal types ([#10523](typescript-eslint/typescript-eslint#10523))- **eslint-plugin:** \[no-deprecated] doesn't report on shorthand property in an object expression ([#10550](typescript-eslint/typescript-eslint#10550))- **eslint-plugin:** \[strict-boolean-expressions] remove remaining (unsafe) autofixes ([#10548](typescript-eslint/typescript-eslint#10548))- **eslint-plugin:** \[no-shadow] report correctly on parameters of functions declared with the `declare` keyword ([#10543](typescript-eslint/typescript-eslint#10543))- **eslint-plugin:** \[no-base-to-string] check array generic type ([#10437](typescript-eslint/typescript-eslint#10437))##### ❤️ Thank You- Kirk Waiblinger- mdm317- Ronen Amiel- Yukihiro Hasegawa [@y-hsgw](https://github.com/y-hsgw)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.
| datasource | package | from | to || ---------- | -------------------------------- | ------ | ------ || npm | @typescript-eslint/eslint-plugin | 8.19.0 | 8.19.1 || npm | @typescript-eslint/parser | 8.19.0 | 8.19.1 |## [v8.19.1](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8191-2025-01-06)##### 🩹 Fixes- **eslint-plugin:** \[no-unnecessary-type-assertion] handle literal types ([#10523](typescript-eslint/typescript-eslint#10523))- **eslint-plugin:** \[no-deprecated] doesn't report on shorthand property in an object expression ([#10550](typescript-eslint/typescript-eslint#10550))- **eslint-plugin:** \[strict-boolean-expressions] remove remaining (unsafe) autofixes ([#10548](typescript-eslint/typescript-eslint#10548))- **eslint-plugin:** \[no-shadow] report correctly on parameters of functions declared with the `declare` keyword ([#10543](typescript-eslint/typescript-eslint#10543))- **eslint-plugin:** \[no-base-to-string] check array generic type ([#10437](typescript-eslint/typescript-eslint#10437))##### ❤️ Thank You- Kirk Waiblinger- mdm317- Ronen Amiel- Yukihiro Hasegawa [@y-hsgw](https://github.com/y-hsgw)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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PR Checklist
Overview
Add case when cast type is a template literal or a union type that is string-like.