adjusted Pr template

Author: Fithi-Teklom

Sprint-3/2-practice-tdd/count.js

@@ -19,3 +19,4 @@ describe('countChar()', () => {
     expect(countChar('!!!', '!')).toBe(5);
   });
 });
+//this is the end.

Sprint-3/3-stretch/card-validator.md

@@ -33,3 +33,64 @@ These are the requirements your project needs to fulfill:
 - Return a boolean from the function to indicate whether the credit card number is valid.
 
 Good luck!
+
+function validateCreditCard(number) {
+  // Convert input to a string so we can check characters easily
+  const numStr = String(number);
+
+  // Rule 1: Must be 16 digits, all numbers
+  if (!/^\d{16}$/.test(numStr)) {
+    return false;
+  }
+
+  // Rule 2: Must contain at least two different digits
+  const uniqueDigits = new Set(numStr);
+  if (uniqueDigits.size < 2) {
+    return false;
+  }
+
+  // Rule 3: The last digit must be even
+  const lastDigit = parseInt(numStr[numStr.length - 1]);
+  if (lastDigit % 2 !== 0) {
+    return false;
+  }
+
+  // Rule 4: The sum of all digits must be greater than 16
+  const sum = numStr
+    .split("")
+    .map(Number)
+    .reduce((a, b) => a + b, 0);
+
+  if (sum <= 16) {
+    return false;
+  }
+
+  // If all checks pass, return true ✅
+  return true;
+}
+
+module.exports = validateCreditCard;
+
+const validateCreditCard = require("./validateCreditCard");
+
+test("valid credit card numbers should return true", () => {
+  expect(validateCreditCard("9999777788880000")).toBe(true);
+  expect(validateCreditCard("6666666666661666")).toBe(true);
+});
+
+test("invalid cards with letters should return false", () => {
+  expect(validateCreditCard("a92332119c011112")).toBe(false);
+});
+
+test("invalid cards with all same digits should return false", () => {
+  expect(validateCreditCard("4444444444444444")).toBe(false);
+});
+
+test("invalid cards with sum less than 16 should return false", () => {
+  expect(validateCreditCard("1111111111111110")).toBe(false);
+});
+
+test("invalid cards with odd final digit should return false", () => {
+  expect(validateCreditCard("6666666666666661")).toBe(false);
+});
+

Sprint-3/3-stretch/password-validator.js

@@ -3,4 +3,40 @@ function passwordValidator(password) {
 }
 
 
-module.exports = passwordValidator;
+module.exports = passwordValidator;
+function validateCreditCard(number) {
+  // Convert input to a string so we can check characters easily
+  const numStr = String(number);
+
+  // Rule 1: Must be 16 digits, all numbers
+  if (!/^\d{16}$/.test(numStr)) {
+    return false;
+  }
+
+  // Rule 2: Must contain at least two different digits
+  const uniqueDigits = new Set(numStr);
+  if (uniqueDigits.size < 2) {
+    return false;
+  }
+
+  // Rule 3: The last digit must be even
+  const lastDigit = parseInt(numStr[numStr.length - 1]);
+  if (lastDigit % 2 !== 0) {
+    return false;
+  }
+
+  // Rule 4: The sum of all digits must be greater than 16
+  const sum = numStr
+    .split("")
+    .map(Number)
+    .reduce((a, b) => a + b, 0);
+
+  if (sum <= 16) {
+    return false;
+  }
+
+  // If all checks pass, return true ✅
+  return true;
+}
+
+module.exports = validateCreditCard;