Day 27: Testing & Interview Preparation

const { test } = require('node:test');
const assert = require('node:assert/strict');

// --- code under test ---
const FREE_FROM = 1500, FEE = 60;
function deliveryFee(subtotal) {
  if (subtotal <= 0) return 0;
  return subtotal >= FREE_FROM ? 0 : FEE;
}
function orderTotal(items, coupon) {
  const subtotal = items.reduce((s, i) => s + i.price * i.qty, 0);
  const discounted = coupon === 'SWEET10' ? Math.round(subtotal * 0.9) : subtotal;
  return discounted + deliveryFee(discounted);
}

// --- tests ---
test('delivery is free from ₹1,500', () => {
  assert.equal(deliveryFee(1500), 0);
  assert.equal(deliveryFee(2400), 0);
});
test('₹60 delivery below ₹1,500', () => {
  assert.equal(deliveryFee(1499), 60);
});
test('empty cart has no delivery fee', () => {
  assert.equal(deliveryFee(0), 0);
});
test('coupon is applied before the delivery rule', () => {
  // 1600 − 10% = 1440 → below 1500 → +60
  assert.equal(orderTotal([{ price: 800, qty: 2 }], 'SWEET10'), 1500);
});

const { test } = require('node:test');
const assert = require('node:assert/strict');

// Bug report: "Mobile +91 98290 12345 is rejected on the order form"
function isValidMobile(input) {
  const digits = input.replace(/\D/g, '');
  const ten = digits.length === 12 && digits.startsWith('91') ? digits.slice(2)
            : digits.length === 11 && digits.startsWith('0') ? digits.slice(1)
            : digits;                                     // ← the fix: accept 91/0 prefixes
  return /^[6-9]\d{9}$/.test(ten);
}

test('accepts common Indian formats (the bug report)', () => {
  for (const ok of ['9829012345', '+91 98290 12345', '098290-12345', '91-9829012345']) {
    assert.ok(isValidMobile(ok), ok);
  }
});
test('still rejects invalid numbers', () => {
  for (const bad of ['5829012345', '98290', '+1 202 555 0101', '']) {
    assert.equal(isValidMobile(bad), false, bad);
  }
});

import { test, expect } from '@playwright/test';

test('customer can order kaju katli', async ({ page }) => {
  await page.goto('http://localhost:5173/');
  await page.getByRole('button', { name: /add kaju katli/i }).click();
  await page.getByRole('link', { name: /cart/i }).click();
  await page.getByLabel('Name').fill('Aarti Gupta');
  await page.getByLabel('Mobile').fill('9829012345');
  await page.getByRole('button', { name: 'Place order' }).click();
  await expect(page.getByText(/order SS\d+/i)).toBeVisible();
});

// 1. Reverse words, 2. palindrome, 3. frequency count, 4. flatten, 5. remove duplicates, 6. chunk, 7. deep equal
const reverseWords = s => s.trim().split(/\s+/).reverse().join(' ');
const isPalindrome = s => { const c = s.toLowerCase().replace(/[^a-z0-9]/g, ''); return c === [...c].reverse().join(''); };
const frequency = arr => arr.reduce((m, x) => ((m[x] = (m[x] || 0) + 1), m), {});
const flatten = arr => arr.reduce((out, x) => out.concat(Array.isArray(x) ? flatten(x) : x), []);
const unique = arr => [...new Set(arr)];
const chunk = (arr, n) => Array.from({ length: Math.ceil(arr.length / n) }, (_, i) => arr.slice(i * n, i * n + n));
const deepEqual = (a, b) => {
  if (a === b) return true;
  if (typeof a !== 'object' || typeof b !== 'object' || !a || !b) return false;
  const ka = Object.keys(a), kb = Object.keys(b);
  return ka.length === kb.length && ka.every(k => deepEqual(a[k], b[k]));
};

console.log(reverseWords('  fresh   ghewar daily '));
console.log(isPalindrome('Madam, in Eden I’m Adam'), isPalindrome('Rasmalai'));
console.log(frequency(['kaju', 'ladoo', 'kaju', 'ghewar', 'kaju']));
console.log(flatten([1, [2, [3, [4]], 5]]));
console.log(unique([302001, 302003, 302001, 302012]));
console.log(chunk(['A101', 'A102', 'A103', 'A104', 'A105'], 2));
console.log(deepEqual({ id: 1, tags: ['veg'] }, { id: 1, tags: ['veg'] }), deepEqual({ a: 1 }, { a: '1' }));