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std/collections/max_of_test.ts

Deno standard library
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { maxOf } from "./max_of.ts";import { assertEquals } from "../testing/asserts.ts";
Deno.test("[collections/maxOf] Regular max", () => { const array = [5, 18, 35, 120];
const actual = maxOf(array, (i) => i); assertEquals(actual, 120);});
Deno.test("[collections/maxOf] Mixed negatives and positives numbers", () => { const array = [-32, -18, 140, 36];
const actual = maxOf(array, (i) => i); assertEquals(actual, 140);});
Deno.test("[collections/maxOf] Negatives numbers", () => { const array = [-32, -18, -140, -36];
const actual = maxOf(array, (i) => i); assertEquals(actual, -18);});
Deno.test("[collections/maxOf] BigInt regular max", () => { const array = [BigInt(5), BigInt(18), BigInt(35), BigInt(120)];
const actual = maxOf(array, (i) => i); assertEquals(actual, BigInt(120));});
Deno.test("[collections/maxOf] BigInt negatives numbers", () => { const array = [BigInt(-32), BigInt(-18), BigInt(-140), BigInt(-36)];
const actual = maxOf(array, (i) => i); assertEquals(actual, BigInt(-18));});
Deno.test("[collection/maxOf] On object properties", () => { const object = [ { name: "mustard", count: 2 }, { name: "soy", count: 4 }, { name: "tomato", count: 32 }, ];
const actual = maxOf(object, (i) => i.count); assertEquals(actual, 32);});
Deno.test("[collection/maxOf] On mixed object properties", () => { const object = [ { name: "mustard", count: -2 }, { name: "soy", count: 4 }, { name: "tomato", count: -32 }, ];
const actual = maxOf(object, (i) => i.count); assertEquals(actual, 4);});
Deno.test("[collections/maxOf] No mutation", () => { const array = [1, 2, 3, 4];
maxOf(array, (i) => i + 2);
assertEquals(array, [1, 2, 3, 4]);});
Deno.test("[collections/maxOf] Empty array results in undefined", () => { const array: number[] = [];
const actual = maxOf(array, (i) => i); assertEquals(actual, undefined);});
Deno.test("[collections/maxOf] NaN and Infinity", () => { const array = [ 1, 2, Number.POSITIVE_INFINITY, 3, 4, Number.NEGATIVE_INFINITY, 5, 6, Number.NaN, 7, 8, ];
const actual = maxOf(array, (i) => i); assertEquals(actual, NaN);});
Deno.test("[collections/maxOf] Infinity", () => { const array = [1, 2, Infinity, 3, 4, 5, 6, 7, 8];
const actual = maxOf(array, (i) => i);
assertEquals(actual, Infinity);});