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hotomoe/packages/backend/test/prelude/maybe.ts

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import * as assert from 'assert';
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import { just, nothing } from '../../src/misc/prelude/maybe.js';
describe('just', () => {
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test('has a value', () => {
assert.deepStrictEqual(just(3).isJust(), true);
});
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test('has the inverse called get', () => {
assert.deepStrictEqual(just(3).get(), 3);
});
});
describe('nothing', () => {
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test('has no value', () => {
assert.deepStrictEqual(nothing().isJust(), false);
});
});