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x/cliffy/dev_deps.ts>assertRejects

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function assertRejects
import { assertRejects } from "https://deno.land/x/cliffy@v0.24.3/dev_deps.ts";

Executes a function which returns a promise, expecting it to reject.

Parameters

fn: () => PromiseLike<unknown>
optional
msg: string

Returns

Promise<unknown>

Executes a function which returns a promise, expecting it to reject. If it does not, then it throws. An error class and a string that should be included in the error message can also be asserted.

Type Parameters

optional
E extends Error = Error

Parameters

fn: () => PromiseLike<unknown>
ErrorClass: new (...args: any[]) => E
optional
msgIncludes: string
optional
msg: string

Returns

Promise<E>

Parameters

fn: () => PromiseLike<unknown>
errorCallback: (e: Error) => unknown
optional
msg: string

Returns

Promise<Error>