import { assertEquals, assertThrows } from "../testing/asserts.ts";import { chunked } from "./chunked.ts";
function chunkedTest<I>( input: [Array<I>, number], expected: Array<Array<I>>, message?: string,) { const actual = chunked(...input); assertEquals(actual, expected, message);}
const testArray = [1, 2, 3, 4, 5, 6];
Deno.test({ name: "[collections/chunked] no mutation", fn() { const array = [1, 2, 3, 4]; chunked(array, 2);
assertEquals(array, [1, 2, 3, 4]); },});
Deno.test({ name: "[collections/chunked] throws on non naturals", fn() { assertThrows(() => chunked([], +.5)); assertThrows(() => chunked([], -4.7)); assertThrows(() => chunked([], -2)); assertThrows(() => chunked([], +0)); assertThrows(() => chunked([], -0)); },});
Deno.test({ name: "[collections/chunked] empty input", fn() { chunkedTest( [[], 1], [], ); },});
Deno.test({ name: "[collections/chunked] single element chunks", fn() { chunkedTest( [testArray, 1], testArray.map((it) => [it]), ); chunkedTest( [["foo"], 1], [["foo"]], ); },});
Deno.test({ name: "[collections/chunked] n chunks fitting", fn() { chunkedTest( [testArray, 2], [[1, 2], [3, 4], [5, 6]], ); chunkedTest( [testArray, 3], [[1, 2, 3], [4, 5, 6]], ); },});
Deno.test({ name: "[collections/chunked] n chunks not fitting", fn() { chunkedTest( [testArray, 4], [[1, 2, 3, 4], [5, 6]], ); chunkedTest( [testArray, 5], [[1, 2, 3, 4, 5], [6]], ); },});
Deno.test({ name: "[collections/chunked] chunks equal to length", fn() { chunkedTest( [testArray, testArray.length], [testArray], ); chunkedTest( [["foo"], 1], [["foo"]], ); },});