Lambda calculus-like library written in TypeScript.
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jlc/test/core.spec.ts

18 lines
522 B

import { describe, expect, it } from '@jest/globals';
import { toNative as $$, _, fromNative as __, cnst, id, undef } from '../src/core';
describe('id', () => {
it('returns first argument', () => {
expect($$(id(__('first')))).toBe('first');
});
});
describe('cnst', () => {
it('returns first argument after receiving second', () => {
expect($$(cnst(__('first'))(__('second')))).toBe('first');
});
it('ignores second argument', () => {
expect($$(cnst(__('first'))(undef))).toBe('first');
});
});