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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../assert/mod.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: "firstNotNullishOf() handles no mutation",  fn() {    const array = [1, 2, 3, 4];    firstNotNullishOf(array, (it) => it * 2);
    assertEquals(array, [1, 2, 3, 4]);  },});
Deno.test({  name: "firstNotNullishOf() handles empty input",  fn() {    firstNotNullishOfTest([[], (it) => it], undefined);  },});
Deno.test({  name: "firstNotNullishOf() handles all items nullish",  fn() {    firstNotNullishOfTest([[undefined, null], (it) => it], undefined);  },});
Deno.test({  name: "firstNotNullishOf() handles identity",  fn() {    firstNotNullishOfTest([[[], 1, 3], (it) => it], []);  },});
Deno.test({  name: "firstNotNullishOf() handles array of array",  fn() {    firstNotNullishOfTest([[[, 0], [null], ["Kim"]], (it) => it[0]], "Kim");  },});
Deno.test({  name: "firstNotNullishOf() handles falsy values",  fn() {    firstNotNullishOfTest([[undefined, false, null], (it) => it], false);  },});
Deno.test({  name: "firstNotNullishOf() handles 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: "firstNotNullishOf() handles 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",    );  },});