London | 26-ITP-May | Alex Jamshidi | Sprint 3 | Practice tdd

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

@@ -1,5 +1,5 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  return stringOfCharacters.split(findCharacter).length - 1;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,10 @@ 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 No occurrences of a character", () => {
+  const str = "aaaaa";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

Sprint-3/2-practice-tdd/get-ordinal-number.js

@@ -1,5 +1,22 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  if (!Number.isInteger(num) || num < 1) {
+    throw new Error("Invalid number");
+  }
+
+  const lastTwoDigits = num.toString().slice(-2);
+  const lastDigit = lastTwoDigits.slice(-1);
+  if (lastTwoDigits == 11 || lastTwoDigits == 12 || lastTwoDigits == 13) {
+    return `${num}th`;
+  }
+  if (lastDigit == 1) {
+    return `${num}st`;
+  }
+  if (lastDigit == 2) {
+    return `${num}nd`;
+  }
+  if (lastDigit == 3) {
+    return `${num}rd`;
+  } else return `${num}th`;
 }
 
 module.exports = getOrdinalNumber;

Sprint-3/2-practice-tdd/get-ordinal-number.test.js

@@ -13,8 +13,47 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // Case 1: Numbers ending with 1 (but not 11)
 // When the number ends with 1, except those ending with 11,
 // Then the function should return a string by appending "st" to the number.
+
 test("should append 'st' for numbers ending with 1, except those ending with 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
   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 ending with 11, 12 or 13", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+});
+
+test("should append 'th' for numbers ending with 4 to 9", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(15)).toEqual("15th");
+  expect(getOrdinalNumber(126)).toEqual("126th");
+  expect(getOrdinalNumber(237)).toEqual("237th");
+  expect(getOrdinalNumber(348)).toEqual("348th");
+  expect(getOrdinalNumber(459)).toEqual("459th");
+});
+
+test("should throw error for invalid number", () => {
+  expect(() => {getOrdinalNumber(0);}).toThrow("Invalid number");
+  expect(() => {getOrdinalNumber(-1);}).toThrow("Invalid number");
+  expect(() => {getOrdinalNumber(1.1);}).toThrow("Invalid number");
+  expect(() => {getOrdinalNumber("hello");}).toThrow("Invalid number");
+
+});

Sprint-3/2-practice-tdd/repeat-str.js

@@ -1,5 +1,11 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {throw new Error("Invalid count");}
+  let string = "";
+  while (count > 0) {
+    string = string + str;
+    count--;
+  }
+  return string;
 }
 
 module.exports = repeatStr;

Sprint-3/2-practice-tdd/repeat-str.test.js

@@ -21,12 +21,33 @@ test("should repeat the string count times", () => {
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
 
+test("should repeat the string count times", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("hello");
+});
+
 // Case: Handle count of 0:
 // Given a target string `str` and a `count` equal to 0,
 // When the repeatStr function is called with these inputs,
 // Then it should return an empty string.
 
+test("should repeat the string count times", () => {
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
+
 // Case: Handle negative count:
 // Given a target string `str` and a negative integer `count`,
 // When the repeatStr function is called with these inputs,
 // Then it should throw an error, as negative counts are not valid.
+
+
+test("should throw error", () => {
+  const str = "hello";
+  const count = -3;
+  expect(() => {repeatStr(str, count);}).toThrow("Invalid count");
+});