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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";import { firstNotNullishOf } from "./first_not_nullish_of.ts";
function firstNotNullishOfTest<T, O>( input: [Array<T>, (el: T) => O | undefined | null], expected: NonNullable<O> | undefined, message?: string,) { const actual = firstNotNullishOf(...input); assertEquals(actual, expected, message);}
Deno.test({ name: "[collections/firstNotNullishOf] no mutation", fn() { const array = [1, 2, 3, 4]; firstNotNullishOf(array, (it) => it * 2);
assertEquals(array, [1, 2, 3, 4]); },});
Deno.test({ name: "[collections/firstNotNullishOf] empty input", fn() { firstNotNullishOfTest([[], (it) => it], undefined); },});
Deno.test({ name: "[collections/firstNotNullishOf] all items nullish", fn() { firstNotNullishOfTest([[undefined, null], (it) => it], undefined); },});
Deno.test({ name: "[collections/firstNotNullishOf] identity", fn() { firstNotNullishOfTest([[[], 1, 3], (it) => it], []); },});
Deno.test({ name: "[collections/firstNotNullishOf] array of array", fn() { firstNotNullishOfTest([[[, 0], [null], ["Kim"]], (it) => it[0]], "Kim"); },});
Deno.test({ name: "[collections/firstNotNullishOf] falsy values", fn() { firstNotNullishOfTest([[undefined, false, null], (it) => it], false); },});
Deno.test({ name: "[collections/firstNotNullishOf] mappers without nullish values", fn() { firstNotNullishOfTest( [["Anna", "Kim", "Hans"], (it) => it.charAt(0)], "A", ); firstNotNullishOfTest([[3, 4, 5, 6], (it) => it * 2], 6); },});
Deno.test({ name: "[collections/firstNotNullishOf] mappers with nullish values", fn() { firstNotNullishOfTest( [ [ { first: "Kim", middle: undefined, last: "Example" }, { first: "Arthur", middle: "Hans", last: "Somename" }, { first: "Laura", middle: "Marija", last: "Anothername" }, { first: "Sam", middle: null, last: "Smith" }, ], (it) => it.middle, ], "Hans", ); },});