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types: fix + test inject API typing

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ref: #2052
This commit is contained in:
Evan You 2020-09-14 21:26:28 -04:00
parent b29bc0d694
commit b2dc95378d
2 changed files with 21 additions and 1 deletions
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7
packages/runtime-core/src/apiInject.ts
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@ -31,7 +31,12 @@ export function inject<T>(key: InjectionKey<T> | string): T | undefined
export function inject<T>(
key: InjectionKey<T> | string,
defaultValue: T,
treatDefaultAsFactory?: boolean
treatDefaultAsFactory?: false
): T
export function inject<T>(
key: InjectionKey<T> | string,
defaultValue: T | (() => T),
treatDefaultAsFactory: true
): T
export function inject(
key: InjectionKey<any> | string,

15
test-dts/inject.test-d.ts Normal file
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@ -0,0 +1,15 @@
import { provide, inject, InjectionKey, expectType } from './index'
const key: InjectionKey<number> = Symbol()
provide(key, 1)
// @ts-expect-error
provide(key, 'foo')
expectType<number | undefined>(inject(key))
expectType<number>(inject(key, 1))
expectType<number>(inject(key, () => 1, true /* treatDefaultAsFactory */))
expectType<() => number>(inject('foo', () => 1))
expectType<() => number>(inject('foo', () => 1, false))
expectType<number>(inject('foo', () => 1, true))