import * as json from './json.js';
import { expect, describe, it } from 'vitest';

describe('encode', async () => {
  it('converts atoms', async () => {
    expect(json.encode(0)).toStrictEqual('0');
    expect(json.encode('hello')).toStrictEqual('"hello"');
    expect(json.encode(null)).toStrictEqual('null');
    expect(json.encode(true)).toStrictEqual('true');
  });

  it('converts lists with indentation', async () => {
    expect(json.encode([])).toStrictEqual('[]');
    expect(json.encode(['hello', 'world'])).toStrictEqual('[\n  "hello",\n  "world"\n]');
  });

  it('converts objects with indentation', async () => {
    expect(json.encode({})).toStrictEqual('{}');
    expect(json.encode({ field: 'value' })).toStrictEqual('{\n  "field": "value"\n}');
  });
});

describe('decode', async () => {
  it('converts valid json values', async () => {
    expect(json.decode('0')).toStrictEqual(0);
    expect(json.decode('null')).toStrictEqual(null);
    expect(json.decode('{}')).toStrictEqual({});
    expect(json.decode('[1, 2, "3"]')).toStrictEqual([1, 2, '3']);
  });

  it('converts invalid json to `undefined`', async () => {
    expect(json.decode('')).toBeUndefined();
    expect(json.decode('{"foo":')).toBeUndefined();
    expect(json.decode('arbitrary nonsense')).toBeUndefined();
  });
});