London | 26-ITP-Sept | Fung Nin Lee | Sprint 2 | practice-tdd

practice-tdd/count.js

@@ -1,3 +1,9 @@
 export function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+  for (let i = 0; i < stringOfCharacters.length; i++) {
+    if (stringOfCharacters[i] === findCharacter) {
+      count++;
+    }
+  }
+  return count;
 }

practice-tdd/count.test.js

@@ -22,3 +22,11 @@ test("should count multiple occurrences of a character", () => {
 // And a character `char` that does not exist within `str`.
 // When the function is called with these inputs,
 // Then it should return 0, indicating that no occurrences of `char` were found.
+
+
+test("should count multiple occurrences of a character", () => {
+  const str = "bbbbb";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

practice-tdd/get-ordinal-number.js

@@ -1,3 +1,14 @@
-export function getOrdinalNumber(num) {
-  return "1st";
+export function getOrdinalNumber(num) { 
+  const numToString = num.toString()
+
+  if (numToString === "11" || numToString === "12" || numToString === "13") {
+  return `${num}th`
+} else if (numToString.at(-1) === "1") {
+  return `${num}st`;
+} else if (numToString.at(-1) === "2") {
+  return `${num}nd`;
+} else if (numToString.at(-1) === "3") {
+  return `${num}rd`;
+} return `${num}th`
 }
+

practice-tdd/get-ordinal-number.test.js

@@ -18,3 +18,28 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+test("should append 'nd' for numbers ending with 2, except those ending with 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(132)).toEqual("132nd");
+});
+
+test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(133)).toEqual("133rd");
+});
+
+test("should append 'th' for numbers 11/12/13", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});
+
+test("should append 'th' for the remaining number", () => {
+  expect(getOrdinalNumber(20)).toEqual("20th");
+  expect(getOrdinalNumber(35)).toEqual("35th");
+  expect(getOrdinalNumber(99)).toEqual("99th");
+});
+