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

min_by_test.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";import { minBy } from "./min_by.ts";
Deno.test("[collections/minBy] of array of input", () => { const input = [ { name: "Kyle", age: 34 }, { name: "John", age: 42 }, { name: "Anna", age: 23 }, ];
const min = minBy(input, (i) => i.age);
assertEquals(min, { name: "Anna", age: 23 });});
Deno.test("[collections/minBy] of array of input with mutation", () => { const input = [ { name: "Kyle", age: 34 }, { name: "John", age: 42 }, { name: "Anna", age: 23 }, ];
const min = minBy(input, (i) => i.age - 10);
assertEquals(min, { name: "Anna", age: 23 });});
Deno.test("[collections/minBy] of array of input with multiple min", () => { const input = [ { name: "Kyle", age: 34 }, { name: "John", age: 42 }, { name: "Anna", age: 23 }, { name: "Anna", age: 23 }, ];
const min = minBy(input, (i) => i.age);
assertEquals(min, { name: "Anna", age: 23 });});
Deno.test("[collections/minBy] of array of positive numbers", () => { const input = [2, 3, 5];
const min = minBy(input, (i) => i);
assertEquals(min, 2);});
Deno.test("[collections/minBy] of array of negative numbers", () => { const input = [-2, -3, -5];
const min = minBy(input, (i) => i);
assertEquals(min, -5);});
Deno.test("[collections/minBy] of array of strings", () => { const input = ["Kyle", "John", "Anna"];
const min = minBy(input, (i: string) => i);
assertEquals(min, "Anna");});
Deno.test("[collections/minBy] of empty array", () => { const input: number[] = [];
const min = minBy(input, (i) => i);
assertEquals(min, undefined);});
Deno.test("[collections/minBy] of array of numbers with multiple min", () => { const input = [2, 3, 5, 5];
const min = minBy(input, (i) => i);
assertEquals(min, 2);});
Deno.test("[collections/minBy] of array of numbers with infinity", () => { const input = [2, 3, 5, -Infinity];
const min = minBy(input, (i: number) => i);
assertEquals(min, -Infinity);});
Deno.test("[collections/minBy] of array of numbers with NaN", () => { const input = [2, 3, 5, NaN];
const min = minBy(input, (i) => i);
assertEquals(min, 2);});
Deno.test("[collections/minBy] no mutation", () => { const input = [2, 3, 5, NaN];
minBy(input, (i: number) => i);
assertEquals(input, [2, 3, 5, NaN]);});
Deno.test("[collections/minBy] empty input", () => { const input: Array<{ age: number }> = [];
const min = minBy(input, (i) => i.age);
assertEquals(min, undefined);});
Deno.test({ name: "[collections/sortBy] bigint", fn() { const input = [ "9007199254740999", "9007199254740991", "9007199254740995", ];
assertEquals(minBy(input, (it) => BigInt(it)), "9007199254740991"); },});
Deno.test({ name: "[collections/sortBy] date", fn() { const input = [ "February 1, 2022", "December 17, 1995", "June 12, 2012", ];
assertEquals(minBy(input, (it) => new Date(it)), "December 17, 1995"); },});
std
Deno standard library
GitHub Repositorydenoland/deno_std
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Tagged at
2 months ago