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

partition_test.ts
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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../testing/asserts.ts";import { partition } from "./partition.ts";
function partitionTest<I>( input: [Array<I>, (element: I) => boolean], expected: [Array<I>, Array<I>], message?: string,) { const actual = partition(...input); assertEquals(actual, expected, message);}
Deno.test({ name: "[collections/partition] no mutation", fn() { const array = [1, 2, 3]; partition(array, (it) => it % 2 === 0);
assertEquals(array, [1, 2, 3]); },});
Deno.test({ name: "[collections/partition] empty input", fn() { partitionTest( [[], () => true], [[], []], ); },});
Deno.test({ name: "[collections/partition] all match", fn() { partitionTest( [[2, 4, 6], (it) => it % 2 === 0], [[2, 4, 6], []], ); partitionTest( [["foo", "bar"], (it) => it.length > 0], [["foo", "bar"], []], ); },});
Deno.test({ name: "[collections/partition] none match", fn() { partitionTest( [[3, 7, 5], (it) => it % 2 === 0], [[], [3, 7, 5]], ); partitionTest( [["foo", "bar"], (it) => it.startsWith("z")], [[], ["foo", "bar"]], ); },});
Deno.test({ name: "[collections/partition] some match", fn() { partitionTest( [[13, 4, 13, 8], (it) => it % 2 === 0], [[4, 8], [13, 13]], ); partitionTest( [["foo", "bar", ""], (it) => it.length > 0], [["foo", "bar"], [""]], ); },});
std
Deno standard library
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Tagged at
2 months ago