From a57e153d37cb2654a9bd2e77d1537245bb120bac Mon Sep 17 00:00:00 2001 From: eyob tech Date: Wed, 22 Jul 2026 23:51:57 +0100 Subject: [PATCH 1/3] Implement countChar with tests --- Sprint-3/2-practice-tdd/count.js | 10 ++++++++-- Sprint-3/2-practice-tdd/count.test.js | 21 ++++++++++++++------- 2 files changed, 22 insertions(+), 9 deletions(-) diff --git a/Sprint-3/2-practice-tdd/count.js b/Sprint-3/2-practice-tdd/count.js index 95b6ebb7d4..ff9c23f8f7 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 count = 0; + for (let i = 0; i < stringOfCharacters.length; i++) { + if (stringOfCharacters[i] === findCharacter) { + count++; + } + } + return count; } -module.exports = countChar; +module.exports = countChar; \ No newline at end of file diff --git a/Sprint-3/2-practice-tdd/count.test.js b/Sprint-3/2-practice-tdd/count.test.js index 179ea0ddf7..c0b796d847 100644 --- a/Sprint-3/2-practice-tdd/count.test.js +++ b/Sprint-3/2-practice-tdd/count.test.js @@ -1,14 +1,14 @@ // implement a function countChar that counts the number of times a character occurs in a string const countChar = require("./count"); -// Given a string `str` and a single character `char` to search for, +// Given a string str and a single character char to search for, // When the countChar function is called with these inputs, // Then it should: // Scenario: Multiple Occurrences -// Given the input string `str`, -// And a character `char` that occurs one or more times in `str` (e.g., 'a' in 'aaaaa'), +// Given the input string str, +// And a character char that occurs one or more times in str (e.g., 'a' in 'aaaaa'), // When the function is called with these inputs, -// Then it should correctly count occurrences of `char`. +// Then it should correctly count occurrences of char. test("should count multiple occurrences of a character", () => { const str = "aaaaa"; @@ -18,7 +18,14 @@ test("should count multiple occurrences of a character", () => { }); // Scenario: No Occurrences -// Given the input string `str`, -// And a character `char` that does not exist within `str`. +// 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. +// Then it should return 0, indicating that no occurrences of char were found. + +test("should return 0 when the character does not occur", () => { + const str = "aaaaa"; + const char = "b"; + const count = countChar(str, char); + expect(count).toEqual(0); +}); \ No newline at end of file From 514a13eaea95c15fee85b343b3f455a5f12a0692 Mon Sep 17 00:00:00 2001 From: eyob tech Date: Wed, 22 Jul 2026 23:52:21 +0100 Subject: [PATCH 2/3] Implement repeatStr with tests --- Sprint-3/2-practice-tdd/repeat-str.js | 16 +++++++--- Sprint-3/2-practice-tdd/repeat-str.test.js | 34 +++++++++++++++++----- 2 files changed, 39 insertions(+), 11 deletions(-) diff --git a/Sprint-3/2-practice-tdd/repeat-str.js b/Sprint-3/2-practice-tdd/repeat-str.js index 2af0a2cea7..7a98090668 100644 --- a/Sprint-3/2-practice-tdd/repeat-str.js +++ b/Sprint-3/2-practice-tdd/repeat-str.js @@ -1,7 +1,15 @@ -function repeatStr() { - // 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). +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"; + if (count < 0) { + throw new Error("count must not be negative"); + } + + let result = ""; + for (let i = 0; i < count; i++) { + result += str; + } + return result; } -module.exports = repeatStr; +module.exports = repeatStr; \ No newline at end of file diff --git a/Sprint-3/2-practice-tdd/repeat-str.test.js b/Sprint-3/2-practice-tdd/repeat-str.test.js index a3fc1196c4..86812928bd 100644 --- a/Sprint-3/2-practice-tdd/repeat-str.test.js +++ b/Sprint-3/2-practice-tdd/repeat-str.test.js @@ -1,13 +1,13 @@ // Implement a function repeatStr const repeatStr = require("./repeat-str"); -// Given a target string `str` and a positive integer `count`, +// Given a target string str and a positive integer count, // When the repeatStr function is called with these inputs, // Then it should: // Case: handle multiple repetitions: -// Given a target string `str` and a positive integer `count` greater than 1, +// Given a target string str and a positive integer count greater than 1, // When the repeatStr function is called with these inputs, -// Then it should return a string that contains the original `str` repeated `count` times. +// Then it should return a string that contains the original str repeated count times. test("should repeat the string count times", () => { const str = "hello"; @@ -17,16 +17,36 @@ test("should repeat the string count times", () => { }); // Case: handle count of 1: -// Given a target string `str` and a `count` equal to 1, +// 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. +// Then it should return the original str without repetition. + +test("should return the original string when count is 1", () => { + 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, +// 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 an empty string when count is 0", () => { + 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`, +// 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 an error when count is negative", () => { + const str = "hello"; + const count = -1; + expect(() => repeatStr(str, count)).toThrow(); +}); \ No newline at end of file From 00f6f15be61e9dc2852dc4accfd544b81b304f3c Mon Sep 17 00:00:00 2001 From: eyob tech Date: Wed, 22 Jul 2026 23:52:59 +0100 Subject: [PATCH 3/3] Implement getOrdinalNumber with tests --- Sprint-3/2-practice-tdd/get-ordinal-number.js | 19 ++++++++- .../2-practice-tdd/get-ordinal-number.test.js | 42 ++++++++++++++++++- 2 files changed, 58 insertions(+), 3 deletions(-) diff --git a/Sprint-3/2-practice-tdd/get-ordinal-number.js b/Sprint-3/2-practice-tdd/get-ordinal-number.js index f95d71db13..84477bbe98 100644 --- a/Sprint-3/2-practice-tdd/get-ordinal-number.js +++ b/Sprint-3/2-practice-tdd/get-ordinal-number.js @@ -1,5 +1,20 @@ function getOrdinalNumber(num) { - return "1st"; + const lastTwoDigits = num % 100; + const lastDigit = num % 10; + + if (lastTwoDigits >= 11 && lastTwoDigits <= 13) { + return `${num}th`; + } + + if (lastDigit === 1) { + return `${num}st`; + } else if (lastDigit === 2) { + return `${num}nd`; + } else if (lastDigit === 3) { + return `${num}rd`; + } else { + return `${num}th`; + } } -module.exports = getOrdinalNumber; +module.exports = getOrdinalNumber; \ No newline at end of file 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..c9294b71ec 100644 --- a/Sprint-3/2-practice-tdd/get-ordinal-number.test.js +++ b/Sprint-3/2-practice-tdd/get-ordinal-number.test.js @@ -2,7 +2,7 @@ const getOrdinalNumber = require("./get-ordinal-number"); // In this week's prep, we started implementing getOrdinalNumber. // Continue testing and implementing getOrdinalNumber for additional cases. -// Write your tests using Jest — remember to run your tests often for continual feedback. +// Write your tests using Jest - remember to run your tests often for continual feedback. // To ensure thorough testing, we need broad scenarios that cover all possible cases. // Listing individual values, however, can quickly lead to an unmanageable number of test cases. @@ -18,3 +18,43 @@ test("should append 'st' for numbers ending with 1, except those ending with 11" expect(getOrdinalNumber(21)).toEqual("21st"); expect(getOrdinalNumber(131)).toEqual("131st"); }); + +// Case 2: Numbers ending with 2 (but not 12) +// When the number ends with 2, except those ending with 12, +// Then the function should return a string by appending "nd" to the number. +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"); +}); + +// Case 3: Numbers ending with 3 (but not 13) +// When the number ends with 3, except those ending with 13, +// Then the function should return a string by appending "rd" to the number. +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"); +}); + +// Case 4: Numbers ending with 11, 12, or 13 +// When the number ends with 11, 12, or 13, +// Then the function should return a string by appending "th" to the number. +test("should append 'th' for numbers ending with 11, 12, or 13", () => { + expect(getOrdinalNumber(11)).toEqual("11th"); + expect(getOrdinalNumber(12)).toEqual("12th"); + expect(getOrdinalNumber(13)).toEqual("13th"); + expect(getOrdinalNumber(111)).toEqual("111th"); + expect(getOrdinalNumber(112)).toEqual("112th"); + expect(getOrdinalNumber(113)).toEqual("113th"); +}); + +// Case 5: All other numbers +// When the number ends with 0, or 4 through 9, +// Then the function should return a string by appending "th" to the number. +test("should append 'th' for all other numbers", () => { + expect(getOrdinalNumber(4)).toEqual("4th"); + expect(getOrdinalNumber(10)).toEqual("10th"); + expect(getOrdinalNumber(100)).toEqual("100th"); + expect(getOrdinalNumber(0)).toEqual("0th"); +}); \ No newline at end of file