mirror of
https://example.com
synced 2024-11-24 07:46:39 +09:00
29 lines
626 B
TypeScript
29 lines
626 B
TypeScript
|
/*
|
||
|
|
* Tests of Maybe
|
||
|
|
*
|
||
|
|
* How to run the tests:
|
||
|
|
* > mocha test/prelude/maybe.ts --require ts-node/register
|
||
|
|
*
|
||
|
|
* To specify test:
|
||
|
|
* > mocha test/prelude/maybe.ts --require ts-node/register -g 'test name'
|
||
|
|
*/
|
||
|
|
|
||
|
|
import * as assert from 'assert';
|
||
|
|
import { just, nothing } from '../../src/prelude/maybe';
|
||
|
|
|
||
|
|
describe('just', () => {
|
||
|
|
it('has a value', () => {
|
||
|
|
assert.deepStrictEqual(just(3).isJust(), true);
|
||
|
|
});
|
||
|
|
|
||
|
|
it('has the inverse called get', () => {
|
||
|
|
assert.deepStrictEqual(just(3).get(), 3);
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
describe('nothing', () => {
|
||
|
|
it('has no value', () => {
|
||
|
|
assert.deepStrictEqual(nothing().isJust(), false);
|
||
|
|
});
|
||
|
|
});
|