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x/tsafe/test/UnpackPromise.ts

🔩 The missing TypeScript utils
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/* eslint-disable @typescript-eslint/no-explicit-any *//* eslint-disable @typescript-eslint/no-unused-vars *//* eslint-disable @typescript-eslint/ban-ts-comment */import type { UnpackPromise } from "../UnpackPromise.ts";import { assert } from "../assert.ts";import type { Equals } from "../Equals.ts";
//@ts-ignorefunction test<T>() { const prT = new Promise<T>(resolve => setTimeout(resolve, 1));
type Expected = T; type Got = UnpackPromise<typeof prT>;
assert<Equals<Got, Expected>>();}
//@ts-ignorefunction test<T>() { const f = async () => { const out: T = null as any; return out; };
const prT = f();
type Expected = T; type Got = UnpackPromise<typeof prT>;
assert<Equals<Got, Expected>>();}
{ type Got = UnpackPromise<undefined | null | false | "">; type Expected = never;
assert<Equals<Got, Expected>>();}
{ //@ts-expect-error type Got = UnpackPromise<string>;}