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The Standard Library has been moved to JSR. See the blog post for details.

function returnsArg

import { returnsArg } from "https://deno.land/std@0.201.0/testing/mock.ts";

returnsArg<Arg, Self = any>(idx: number): (this: Self, ...args: Arg[]) => Arg

Creates a function that returns one of its arguments.

Type Parameters

Arg

optional

Self = any

Parameters

idx: number

Returns

(this: Self, ...args: Arg[]) => Arg