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fix(type-utils): check for type parameters on isBuiltinSymbolLikeRecurser() #10026

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Merged
merged 3 commits into from
Sep 27, 2024
Merged

fix(type-utils): check for type parameters on isBuiltinSymbolLikeRecurser() #10026

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7425409
check type parameter on isBuiltinSymbolLikeRecurser
ronami Sep 20, 2024
5f40ec5
basic tests
ronami Sep 20, 2024
3406cb7
use tsutils.isTypeParameter() instead of type.isTypeParameter()
ronami Sep 20, 2024
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17 changes: 17 additions & 0 deletions packages/eslint-plugin/tests/rules/only-throw-error.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -132,6 +132,11 @@ function fun(value: any) {
`
function fun(value: unknown) {
throw value;
}
`,
`
function fun<T extends Error>(t: T): void {
throw t;
}
`,
],
Expand Down Expand Up @@ -468,5 +473,17 @@ function fun(value: unknown) {
},
],
},
{
code: `
function fun<T extends number>(t: T): void {
throw t;
}
`,
errors: [
{
messageId: 'object',
},
],
},
],
});
24 changes: 24 additions & 0 deletions packages/eslint-plugin/tests/rules/prefer-promise-reject-errors.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -275,6 +275,12 @@ ruleTester.run('prefer-promise-reject-errors', rule, {
}
}
`,
`
declare const foo: PromiseConstructor;
function fun<T extends Error>(t: T): void {
foo.reject(t);
}
`,
],
invalid: [
{
Expand Down Expand Up @@ -1443,5 +1449,23 @@ Bar.reject(5);
},
],
},
{
code: `
declare const foo: PromiseConstructor;
function fun<T extends number>(t: T): void {
foo.reject(t);
}
`,
errors: [
{
messageId: 'rejectAnError',
type: AST_NODE_TYPES.CallExpression,
line: 4,
endLine: 4,
column: 3,
endColumn: 16,
},
],
},
],
});
11 changes: 11 additions & 0 deletions packages/type-utils/src/builtinSymbolLikes.ts
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
import * as tsutils from 'ts-api-utils';
import * as ts from 'typescript';

import { isSymbolFromDefaultLibrary } from './isSymbolFromDefaultLibrary';
Expand Down Expand Up @@ -158,6 +159,16 @@ export function isBuiltinSymbolLikeRecurser(
isBuiltinSymbolLikeRecurser(program, t, predicate),
);
}
// https://github.com/JoshuaKGoldberg/ts-api-utils/issues/382
if ((tsutils.isTypeParameter as (type: ts.Type) => boolean)(type)) {
const t = type.getConstraint();

if (t) {
return isBuiltinSymbolLikeRecurser(program, t, predicate);
}

return false;
}

const predicateResult = predicate(type);
if (typeof predicateResult === 'boolean') {
Expand Down