diff --git a/challenges/unit-testing/katas-tdd/calculator/calculator.js b/challenges/unit-testing/katas-tdd/calculator/calculator.js
new file mode 100644
index 0000000..8ceeb8d
--- /dev/null
+++ b/challenges/unit-testing/katas-tdd/calculator/calculator.js
@@ -0,0 +1,37 @@
+function add(numbers){
+ let sum = 0;
+ if (numbers === ""){
+ return "there is no number";
+ }
+ let listNumber = numbers.split(",").map(Number);
+
+ let negativeNumbers = [];
+ for (let elem in listNumber){
+ if (listNumber[elem] < 0){
+ negativeNumbers.push(listNumber[elem])
+ }
+ }
+ if (negativeNumbers.length > 0){
+ throw new Error(`negatives not allowed: ${negativeNumbers.join(", ")}`);
+ }
+ else {
+ for (let item in listNumber){
+ if (listNumber[item] > 1000){
+ sum += 0;
+ }
+ else {
+ sum +=listNumber[item];
+ }
+
+ }
+ }
+
+ return sum;
+}
+
+console.log(add(""));
+console.log(add("3"));
+console.log(add("3,2,4,1"));
+console.log(add("3,2,4,1,33,45,12,56,78, 34"));
+console.log(add("2,3,1001"));
+console.log(add("3,2,4,1,-11,-4"));
\ No newline at end of file
diff --git a/challenges/unit-testing/katas-tdd/password-verifier/passwverifier.js b/challenges/unit-testing/katas-tdd/password-verifier/passwverifier.js
new file mode 100644
index 0000000..3f6c4e1
--- /dev/null
+++ b/challenges/unit-testing/katas-tdd/password-verifier/passwverifier.js
@@ -0,0 +1,21 @@
+function verify(password){
+ if(password == null || password.length < 8){
+ return "Password rejected";
+ }
+ else if(!/[A-Z]/.test(password)){
+ return "Password rejected";
+ }
+ else if(!/[0-9]/.test(password)){
+ return "Password rejected";
+ }
+ else{
+ return 'Password accepted';
+ }
+}
+
+console.log(verify("ej"));
+console.log(verify(null));
+console.log(verify("helloworld"));
+console.log(verify("HelloWorld"));
+console.log(verify("HelloWorld1"));
+console.log(verify("HELLOWORLD223"));
\ No newline at end of file
diff --git a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.js b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.js
index 0f2fe4b..902cb99 100644
--- a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.js
+++ b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.js
@@ -1,3 +1,55 @@
-function convertToNewRoman(n) {}
+function convertToNewRoman(n) {
+ let roman = "";
+
+ // Thousands place (1000)
+ while (n >= 1000) {
+ roman += "M";
+ n -= 1000;
+ }
+
+ // Hundreds place (500)
+ while (n >= 500) {
+ roman += "D";
+ n -= 500;
+ }
+
+ // Hundreds place (100)
+ while (n >= 100) {
+ roman += "C";
+ n -= 100;
+ }
+
+ // Tens place (50)
+ while (n >= 50) {
+ roman += "L";
+ n -= 50;
+ }
+
+ // Tens place (10)
+ while (n >= 10) {
+ roman += "X";
+ n -= 10;
+ }
+
+ // Ones place (5)
+ while (n >= 5) {
+ roman += "V";
+ n -= 5;
+ }
+
+ // Ones place (1)
+ while (n >= 1) {
+ roman += "I";
+ n -= 1;
+ }
+
+ return roman;
+}
+
+console.log(convertToNewRoman(4));
+console.log(convertToNewRoman(77));
+console.log(convertToNewRoman(1));
+
+
module.exports = convertToNewRoman;
diff --git a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.test.js b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.test.js
index ae49f73..88bece8 100644
--- a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.test.js
+++ b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-new-roman.test.js
@@ -1,7 +1,6 @@
let convertToNewRoman = require("./convert-to-new-roman");
test("returns I if passed 1 as an argument", function () {
- // Arrange
- // Act
- // Assert
+ expect(convertToNewRoman(1)).toBe("I");
});
+
diff --git a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.js b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.js
index f7f0d06..42d0c71 100644
--- a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.js
+++ b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.js
@@ -1,3 +1,37 @@
-function convertToOldRoman(n) {}
-
+function convertToOldRoman(num) {
+ const romanMapping = [
+ { value: 1000, numeral: "M" },
+ { value: 900, numeral: "CM" },
+ { value: 500, numeral: "D" },
+ { value: 400, numeral: "CD" },
+ { value: 100, numeral: "C" },
+ { value: 90, numeral: "XC" },
+ { value: 50, numeral: "L" },
+ { value: 40, numeral: "XL" },
+ { value: 10, numeral: "X" },
+ { value: 9, numeral: "IX" },
+ { value: 5, numeral: "V" },
+ { value: 4, numeral: "IV" },
+ { value: 1, numeral: "I" }
+ ];
+
+ let roman = "";
+
+ for (const { value, numeral } of romanMapping) {
+ // Append the numeral as many times as the value fits into num
+ while (num >= value) {
+ roman += numeral;
+ num -= value;
+ }
+ }
+
+ return roman;
+ }
+
+console.log(convertToOldRoman(4));
+console.log(convertToOldRoman(9));
+console.log(convertToOldRoman(58));
+console.log(convertToOldRoman(1999));
+console.log(convertToOldRoman(3000));
+console.log(convertToOldRoman(14));
module.exports = convertToOldRoman;
diff --git a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.test.js b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.test.js
index b9a4386..244fd8a 100644
--- a/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.test.js
+++ b/challenges/unit-testing/katas-tdd/roman-numerals/convert-to-old-roman.test.js
@@ -1,7 +1,5 @@
let convertToOldRoman = require("./convert-to-old-roman");
test("returns I if passed 1 as an argument", function () {
- // Arrange
- // Act
- // Assert
+ expect(convertToOldRoman(14)).toBe("XIV");
});
diff --git a/fetch/programmer-humour/index.html b/fetch/programmer-humour/index.html
new file mode 100644
index 0000000..a9f5183
--- /dev/null
+++ b/fetch/programmer-humour/index.html
@@ -0,0 +1,18 @@
+
+
+
+
+
+
+ XKCD Comic Viewer
+
+
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/fetch/programmer-humour/script.js b/fetch/programmer-humour/script.js
new file mode 100644
index 0000000..21e01a9
--- /dev/null
+++ b/fetch/programmer-humour/script.js
@@ -0,0 +1,27 @@
+
+let myData;
+
+async function fetchData() {
+ try{
+ const response = await fetch("https://xkcd.now.sh/?comic=latest")
+
+ if (!response.ok) {
+ throw new Error(`HTTP error! Status: ${response.status}`);
+ }
+
+ myData = await response.json()
+ //console.log(`${JSON.stringify(myData)} this is api`)
+ let section = document.body;
+ const image = document.createElement("img");
+ image.src = myData.img;
+ image.alt = myData.alt;
+ section.appendChild(image);
+ }
+ catch(error) {
+ console.error("an error happened", error.message);
+ alert("Something went wrong. Please try again later.");
+ }
+
+}
+
+fetchData()
diff --git a/fetch/programmer-humour/style.css b/fetch/programmer-humour/style.css
new file mode 100644
index 0000000..2a24e61
--- /dev/null
+++ b/fetch/programmer-humour/style.css
@@ -0,0 +1,4 @@
+img{
+ width: 500px;
+ height: 500px;
+}
\ No newline at end of file