From 3672528a521cad2683fe3659e0de2a28c3534f4e Mon Sep 17 00:00:00 2001
From: Mohsen Zamani <mohsenzamanist@gmail.com>
Date: Wed, 28 Jan 2026 13:48:24 +0000
Subject: [PATCH] Complete sprint-3-stretch

---
 Sprint-3/4-stretch/card-validator.js          | 30 ++++++++
 Sprint-3/4-stretch/password-validator.js      | 12 +++-
 Sprint-3/4-stretch/password-validator.test.js | 69 ++++++++++++++++---
 3 files changed, 100 insertions(+), 11 deletions(-)
 create mode 100644 Sprint-3/4-stretch/card-validator.js

diff --git a/Sprint-3/4-stretch/card-validator.js b/Sprint-3/4-stretch/card-validator.js
new file mode 100644
index 000000000..27e6a8db5
--- /dev/null
+++ b/Sprint-3/4-stretch/card-validator.js
@@ -0,0 +1,30 @@
+function creditCardValidator(cardNum) {
+  // Splits the cardNum into an array of characters
+  const cardNumArray = cardNum.split("");
+
+  // Checks if length is 16, otherwise return false
+  if (cardNumArray.length !== 16) return false;
+
+  // checks if all digits are numbers
+  if (
+    !cardNumArray.every(
+      (num) => num.charCodeAt(0) >= 48 && num.charCodeAt(0) <= 57
+    )
+  )
+    return false;
+
+  // Checks if there are at least two different digits
+  const count = cardNumArray.reduce((acc, curr) => {
+    acc[curr] = acc[curr] ? acc[curr] + 1 : 1;
+    return acc;
+  }, {});
+  if (Object.keys(count).length < 2) return false;
+
+  // Checks if the sum of all digits is greater than 16
+  const sumOfDigits = cardNumArray.reduce((acc, curr) => acc + Number(curr), 0);
+  if (sumOfDigits <= 16) return false;
+
+  //checks if last digit is even
+  if (cardNumArray[cardNumArray.length - 1] % 2 !== 0) return false;
+  return true;
+}
diff --git a/Sprint-3/4-stretch/password-validator.js b/Sprint-3/4-stretch/password-validator.js
index b55d527db..c5862420c 100644
--- a/Sprint-3/4-stretch/password-validator.js
+++ b/Sprint-3/4-stretch/password-validator.js
@@ -1,6 +1,12 @@
+const previousPasswords = ["5B43n21"];
 function passwordValidator(password) {
-    return password.length < 5 ? false : true
-}
+  if (password.length < 5) return false;
+  if (previousPasswords.includes(password)) return false;
+  previousPasswords.push(password);
+
+  const rules = [/[A-Z]/, /[a-z]/, /[0-9]/, /[!#$%.*&]/];
 
+  return rules.every((rule) => rule.test(password));
+}
 
-module.exports = passwordValidator;
\ No newline at end of file
+module.exports = passwordValidator;
diff --git a/Sprint-3/4-stretch/password-validator.test.js b/Sprint-3/4-stretch/password-validator.test.js
index 8fa3089d6..7fc179591 100644
--- a/Sprint-3/4-stretch/password-validator.test.js
+++ b/Sprint-3/4-stretch/password-validator.test.js
@@ -16,11 +16,64 @@ You must breakdown this problem in order to solve it. Find one test case first a
 */
 const isValidPassword = require("./password-validator");
 test("password has at least 5 characters", () => {
-    // Arrange
-    const password = "12345";
-    // Act
-    const result = isValidPassword(password);
-    // Assert
-    expect(result).toEqual(true);
-}
-);
\ No newline at end of file
+  // Arrange
+  const password = "A1b2";
+  // Act
+  const result = isValidPassword(password);
+  // Assert
+  expect(result).toEqual(false);
+});
+
+test("password is not previously used", () => {
+  // Arrange
+  const password = "5B43n21";
+  // Act
+  const result = isValidPassword(password);
+  // Assert
+  expect(result).toEqual(false);
+});
+
+test("password contains at least one uppercase English letter", () => {
+  // Arrange
+  const password = "1a2345";
+  // Act
+  const result = isValidPassword(password);
+  // Assert
+  expect(result).toEqual(false);
+});
+
+test("password contains at least one uppercase English letter", () => {
+  // Arrange
+  const password = "1B2345";
+  // Act
+  const result = isValidPassword(password);
+  // Assert
+  expect(result).toEqual(false);
+});
+
+test("password contains at least one number(0-9)", () => {
+  // Arrange
+  const password = "sdkerjJNGk";
+  // Act
+  const result = isValidPassword(password);
+  // Assert
+  expect(result).toEqual(false);
+});
+
+test('password contains at least one of "!", "#", "$", "%", ".", "*", "&"', () => {
+  // Arrange
+  const password = "sdkerjJNG23k";
+  // Act
+  const result = isValidPassword(password);
+  // Assert
+  expect(result).toEqual(false);
+});
+
+test("password meets all the condition for a valid password and passwordValidator returns true", () => {
+  // Arrange
+  const password = "sdkerjJNG23k&";
+  // Act
+  const result = isValidPassword(password);
+  // Assert
+  expect(result).toEqual(true);
+});