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[bugfix] no-unsafe-any: allow implicitly downcasting any to unknown #4442

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merged 8 commits into from Jan 11, 2019

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ThomasdenH
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@ThomasdenH ThomasdenH commented Jan 7, 2019

PR checklist

Overview of change:

Downcasting any to unknown is always safe. This PR fixes the no-unsafe-any rule to reflect this.

Is there anything you'd like reviewers to focus on?

I have copied from existing test cases and modified them to use unknown. I have tried to be exhaustive, but there might still be false positives.

CHANGELOG.md entry:

[bugfix] no-unsafe-any: allow implicitly downcasting any to unknown

@ThomasdenH
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It looks like simply ignoring the errors doesn't work here, unfortunately.

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Moving the tests containing unknown to file that only runs on typescript >= 3.0.0 fixed it.

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@JoshuaKGoldberg JoshuaKGoldberg left a comment

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Generally LGTM except for the unnecessary parameter. Another maintainer should take a look to be sure.

src/rules/noUnsafeAnyRule.ts Outdated Show resolved Hide resolved
@ThomasdenH
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The issue has been adressed, this PR is ready for a review when you have the time.

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@adidahiya adidahiya left a comment

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LGTM otherwise

test/rules/no-unsafe-any/unknown/test.ts.lint Show resolved Hide resolved
test/rules/no-unsafe-any/unknown/test.ts.lint Outdated Show resolved Hide resolved
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ThomasdenH commented Jan 11, 2019

Thanks for the review! I have addressed your suggestions. I also removed the module imports as they didn't test anything that isn't tested by the other tests for this lint already.

@adidahiya adidahiya merged commit 4e21e43 into palantir:master Jan 11, 2019
ColCh added a commit to ColCh/tslint that referenced this pull request Feb 3, 2019
* master: (60 commits)
  Added tslint-brunch to the list of 3rd party tools (palantir#4251)
  Switch to tslint-plugin-prettier, clean up rule options config syntax (palantir#4488)
  Enable grouped-imports for ordered-imports rule in tslint:all config (palantir#4420)
  Ordered imports grouping (palantir#4134)
  trailing-comma: check for a closing parenthesis (palantir#4457)
  Update index.md (palantir#4473)
  [bugfix] `no-unsafe-any`: allow implicitly downcasting `any` to `unknown` (palantir#4442)
  Add v5.12.1 changelog
  Bump version to 5.12.1
  Fix quotemark avoid-template issues (palantir#4408)
  Skip linting JSON files entirely (palantir#4001)
  Fix strict-type-predicate for unknown (palantir#4444)
  restrict increment-decrement fixer while fixing the postfix unary expressions (palantir#4415)
  Mention file names in script parse failures (palantir#4397)
  Revert breaking change to tslint:recommended, update tslint:latest (palantir#4404)
  Fix quotemark avoid-template issues (palantir#4408)
  Bump tslint dev dependency to 5.12.0 (palantir#4452)
  Skip linting JSON files entirely (palantir#4001)
  Fix strict-type-predicate for unknown (palantir#4444)
  [README] Update link for Webstorm (palantir#4450)
  ...
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no-unsafe-any and unknown
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