deno.land / std@0.166.0 / collections / map_values_test.ts

map_values_test.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";import { mapValues } from "./map_values.ts";
function mapValuesTest<T, O>( input: [Record<string, T>, (value: T) => O], expected: Record<string, O>, message?: string,) { const actual = mapValues(...input); assertEquals(actual, expected, message);}
Deno.test({ name: "[collections/mapValues] no mutation", fn() { const object = { a: 5, b: true }; mapValues(object, (it) => it ?? "nothing");
assertEquals(object, { a: 5, b: true }); },});
Deno.test({ name: "[collections/mapValues] empty input", fn() { mapValuesTest( [{}, (it) => it], {}, ); },});
Deno.test({ name: "[collections/mapValues] identity", fn() { mapValuesTest( [ { foo: true, bar: "lorem", 1: -5, }, (it) => it, ], { foo: true, bar: "lorem", 1: -5, }, ); },});
Deno.test({ name: "[collections/mapValues] falsy values", fn() { mapValuesTest<number, null | undefined | string | boolean>( [ { "something": 0, "yetanotherkey": 1, "andonemore": 2, "lastone": 3, }, (it) => [null, undefined, "", false][it], ], { "something": null, "yetanotherkey": undefined, "andonemore": "", "lastone": false, }, ); },});
Deno.test({ name: "[collections/mapValues] normal mappers", fn() { mapValuesTest( [ { "FoodFile": "/home/deno/food.txt", "CalendarFile": "/home/deno/weekend.cal", }, (path) => path.substr(path.lastIndexOf(".")), ], { "FoodFile": ".txt", "CalendarFile": ".cal", }, ); mapValuesTest( [ { "Curry": 20, "Beans": 2, "Rice": 3.5, }, (price) => price.toFixed(2), ], { "Curry": "20.00", "Beans": "2.00", "Rice": "3.50", }, ); },});
std
Deno standard library
GitHub Repositorydenoland/deno_std
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Tagged at
2 months ago