import test from 'node:test';
import assert from 'node:assert/strict';
import { parseQuantity } from './quantity.mjs';

test('accepted values and ECMAScript surrounding whitespace', () => {
  for (const [input, quantity] of [
    ['1', 1], ['12', 12], ['1000', 1000], [' 12 ', 12],
    ['\t12\n', 12], ['\u00a012\u00a0', 12],
  ]) {
    assert.deepEqual(parseQuantity(input), { ok: true, quantity }, `accept:${JSON.stringify(input)}`);
  }
});

test('non-string inputs keep the type error', () => {
  for (const input of [null, undefined, 12, true, {}, ['12']]) {
    assert.deepEqual(parseQuantity(input), {
      ok: false, error: 'quantity_must_be_text',
    }, `type:${JSON.stringify(input)}`);
  }
});

test('malformed strings keep the format error', () => {
  for (const input of [
    '', ' ', '0', '-1', '+1', '01', '1.0', '1.5', '12boxes',
    '99999', '1 2', '1\n2', '\u200b12', '１２', '١٢',
  ]) {
    assert.deepEqual(parseQuantity(input), {
      ok: false, error: 'quantity_must_be_integer',
    }, `reject:${JSON.stringify(input)}`);
  }
});

test('four-digit values above the product limit keep the range error', () => {
  for (const input of ['1001', '9999']) {
    assert.deepEqual(parseQuantity(input), {
      ok: false, error: 'quantity_out_of_range',
    }, `range:${JSON.stringify(input)}`);
  }
});