From 154190c8c9939b370bf25dbfcedb88c352a618af Mon Sep 17 00:00:00 2001 From: lintsang Date: Mon, 13 Jul 2026 19:38:12 +0100 Subject: [PATCH] 2-practice-tdd exercise --- Sprint-3/2-practice-tdd/count.js | 8 +++- Sprint-3/2-practice-tdd/count.test.js | 28 +++++++++++++ Sprint-3/2-practice-tdd/get-ordinal-number.js | 40 ++++++++++++++++++- .../2-practice-tdd/get-ordinal-number.test.js | 22 ++++++++++ Sprint-3/2-practice-tdd/repeat-str.js | 14 ++++++- Sprint-3/2-practice-tdd/repeat-str.test.js | 18 +++++++++ 6 files changed, 126 insertions(+), 4 deletions(-) diff --git a/Sprint-3/2-practice-tdd/count.js b/Sprint-3/2-practice-tdd/count.js index 95b6ebb7d4..dc867a33d4 100644 --- a/Sprint-3/2-practice-tdd/count.js +++ b/Sprint-3/2-practice-tdd/count.js @@ -1,5 +1,11 @@ function countChar(stringOfCharacters, findCharacter) { - return 5 + let countTime = 0; + for (let i = 0; i < stringOfCharacters.length; i++) { + if (stringOfCharacters.slice(i, i + 1) == findCharacter) {//take each character out from string to compare with the given character. If true, then add one to countTime. + countTime = countTime + 1; + } + } + return countTime; } module.exports = countChar; diff --git a/Sprint-3/2-practice-tdd/count.test.js b/Sprint-3/2-practice-tdd/count.test.js index 179ea0ddf7..4e2c31b065 100644 --- a/Sprint-3/2-practice-tdd/count.test.js +++ b/Sprint-3/2-practice-tdd/count.test.js @@ -17,8 +17,36 @@ test("should count multiple occurrences of a character", () => { expect(count).toEqual(5); }); +test("should count multiple occurrences of a character", () => { + const str = "aaabcde"; + const char = "c"; + const count = countChar(str, char); + expect(count).toEqual(1); +}); + +test("should count multiple occurrences of a character", () => { + const str = "a2b3c4"; + const char = "3"; + const count = countChar(str, char); + expect(count).toEqual(1); +}); + +test("should count multiple occurrences of a character", () => { + const str = "4444444444444444444"; + const char = "4"; + const count = countChar(str, char); + expect(count).toEqual(19); +}); + // Scenario: No Occurrences // Given the input string `str`, // 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 occurrence of a character", () => { + const str = "fghij"; + const char = "b"; + const count = countChar(str, char); + expect(count).toEqual(0); +}); diff --git a/Sprint-3/2-practice-tdd/get-ordinal-number.js b/Sprint-3/2-practice-tdd/get-ordinal-number.js index f95d71db13..2cd59c6865 100644 --- a/Sprint-3/2-practice-tdd/get-ordinal-number.js +++ b/Sprint-3/2-practice-tdd/get-ordinal-number.js @@ -1,5 +1,43 @@ function getOrdinalNumber(num) { - return "1st"; + let onesDigit; + + if (String(num).length > 1) { + //check if the number has more than 1 digit + onesDigit = Number(String(num).slice(-1)); //extract the figure at the tens digit, and convert it into a number. + const tensDigit = Number(String(num).slice(-2, -1)); //extract the figure at the tens digit, and convert it into a number. + + if (onesDigit == 1) { + if (tensDigit == 1) { + return num + "th"; + } else { + return num + "st"; + } + } else if (onesDigit == 2) { + if (tensDigit == 1) { + return num + "th"; + } + return num + "nd"; + } else if (onesDigit == 3) { + if (tensDigit == 1) { + return num + "th"; + } + return num + "rd"; + } else { + ("th"); + } + } else if (String(num).length == 1) { + onesDigit = Number(String(num)[0]); //extract the figure at the tens digit, and convert it into a number. + if (onesDigit == 1) { + return num + "st"; + console.log("Yeah youre in"); + } else if (onesDigit == 2) { + return num + "nd"; + } else if (onesDigit == 3) { + return num + "rd"; + } else { + return num + "th"; + } + } } module.exports = getOrdinalNumber; diff --git a/Sprint-3/2-practice-tdd/get-ordinal-number.test.js b/Sprint-3/2-practice-tdd/get-ordinal-number.test.js index adfa58560f..59b3f219bd 100644 --- a/Sprint-3/2-practice-tdd/get-ordinal-number.test.js +++ b/Sprint-3/2-practice-tdd/get-ordinal-number.test.js @@ -18,3 +18,25 @@ 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 other numbers without ending with 1,2 or 3, except those ending with 1 in tens digit", () => { + expect(getOrdinalNumber(11)).toEqual("11th"); + expect(getOrdinalNumber(12)).toEqual("12th"); + expect(getOrdinalNumber(13)).toEqual("13th"); + expect(getOrdinalNumber(113)).toEqual("113th"); + expect(getOrdinalNumber(213)).toEqual("213th"); + expect(getOrdinalNumber(313)).toEqual("313th"); + expect(getOrdinalNumber(1113)).toEqual("1113th"); +}); diff --git a/Sprint-3/2-practice-tdd/repeat-str.js b/Sprint-3/2-practice-tdd/repeat-str.js index 2af0a2cea7..fd785b834c 100644 --- a/Sprint-3/2-practice-tdd/repeat-str.js +++ b/Sprint-3/2-practice-tdd/repeat-str.js @@ -1,7 +1,17 @@ -function repeatStr() { +function repeatStr(str, count) { // Your implementation of this function must *not* call String.prototype.repeat (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat). // The goal is to re-implement that function, not to use it. - return "hellohellohello"; + let strOutput = ""; + if (count > 0){ + for (let i=0 ; i { // Given a target string `str` and a `count` equal to 1, // When the repeatStr function is called with these inputs, // Then it should return the original `str` without repetition. +test("should return the string with no reptition", () => { + const str = "morning"; + const count = 1; + const repeatedStr = repeatStr(str, count); + expect(repeatedStr).toEqual("morning"); +}); // 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 return empty string as the count is zero", () => { + const str = "afternoon"; + 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 return the string with no reptition", () => { + const str = "evening"; + const count = -1; + const repeatedStr = repeatStr(str, count); + expect(repeatedStr).toEqual("error"); +});