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unzip_test.ts
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unzip_test.ts
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// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "../assert/mod.ts";
import { unzip } from "./unzip.ts";
function unzipTest<T, U>(
input: [Array<[T, U]>],
expected: [Array<T>, Array<U>],
message?: string,
) {
const actual = unzip(...input);
assertEquals(actual, expected, message);
}
Deno.test({
name: "[collections/unzip] no mutation",
fn() {
const zipped: Array<[number, boolean]> = [
[1, true],
[2, false],
[3, true],
];
unzip(zipped);
assertEquals(zipped, [
[1, true],
[2, false],
[3, true],
]);
},
});
Deno.test({
name: "[collections/unzip] empty input",
fn() {
unzipTest(
[[]],
[[], []],
);
},
});
Deno.test({
name: "[collections/unzip] unzips",
fn() {
unzipTest(
[
[
[1, "foo"],
[4, "bar"],
[5, "lorem"],
],
],
[
[1, 4, 5],
["foo", "bar", "lorem"],
],
);
unzipTest(
[
[
[true, false],
],
],
[
[true],
[false],
],
);
unzipTest(
[
[
[undefined, "foo"],
[5, null],
[undefined, "asdf"],
[null, false],
[1.2, ""],
],
],
[
[undefined, 5, undefined, null, 1.2],
["foo", null, "asdf", false, ""],
],
);
},
});