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fix: add type tests #65
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rules: { | ||
rules: /** @type {const} */ ({ | ||
"json/no-duplicate-keys": "error", | ||
"json/no-empty-keys": "error", | ||
"json/no-unsafe-values": "error", | ||
}, | ||
}), |
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This is const
cast syntax. I'm using this to ensure that properties in the rules
object have type "error"
rather than string
, because string
is too wide to be assigned to a severity:
type StringSeverity = "off" | "warn" | "error";
https://github.com/eslint/eslint/blob/v9.15.0/lib/types/index.d.ts#L917
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Neat trick!
@@ -9,7 +9,7 @@ | |||
|
|||
export default { | |||
meta: { | |||
type: "problem", | |||
type: /** @type {const} */ ("problem"), |
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This ensures that the type
property has type "problem"
rather than string
so it matches the definition in the interface:
type?: "problem" | "suggestion" | "layout" | undefined;
https://github.com/eslint/eslint/blob/v9.15.0/lib/types/index.d.ts#L760
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LGTM. This is really cool. Thanks!
Prerequisites checklist
What is the purpose of this pull request?
Add type tests and fix some problems in the types.
What changes did you make? (Give an overview)
Added type tests to the CI workflow. I had to fix some minor issues in the typings of rules metadata and in the recommended config to match the signature of
ESLint.Plugin
. This is why this pull request is taggedfix:
.Related Issues
fixes #61
Is there anything you'd like reviewers to focus on?