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28 lines
634 B
TypeScript
28 lines
634 B
TypeScript
/*
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* Tests of Maybe
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*
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* How to run the tests:
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* > npx mocha test/prelude/maybe.ts --require ts-node/register
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*
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* To specify test:
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* > npx mocha test/prelude/maybe.ts --require ts-node/register -g 'test name'
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*/
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import * as assert from 'assert';
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import { just, nothing } from '../../src/prelude/maybe';
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describe('just', () => {
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it('has a value', () => {
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assert.deepStrictEqual(just(3).isJust(), true);
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});
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it('has the inverse called get', () => {
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assert.deepStrictEqual(just(3).get(), 3);
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});
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});
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describe('nothing', () => {
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it('has no value', () => {
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assert.deepStrictEqual(nothing().isJust(), false);
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});
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});
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