cherrypick/packages/backend/test/prelude/maybe.ts
Shun Sakai c2370a1be6
chore: 著作権とライセンスについての情報を各ファイルに追加する (#11348)
* chore: Add the SPDX information to each file

Add copyright and licensing information as defined in version 3.0 of
the REUSE Specification.

* tweak format

---------

Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
2023-07-27 14:31:52 +09:00

24 lines
543 B
TypeScript

/*
* SPDX-FileCopyrightText: syuilo and other misskey contributors
* SPDX-License-Identifier: AGPL-3.0-only
*/
import * as assert from 'assert';
import { just, nothing } from '../../src/misc/prelude/maybe.js';
describe('just', () => {
test('has a value', () => {
assert.deepStrictEqual(just(3).isJust(), true);
});
test('has the inverse called get', () => {
assert.deepStrictEqual(just(3).get(), 3);
});
});
describe('nothing', () => {
test('has no value', () => {
assert.deepStrictEqual(nothing().isJust(), false);
});
});