From 831c151c5c865fe1b359e2e5a5ed63e1abb99774 Mon Sep 17 00:00:00 2001 From: Diana <40689028+ausiejute@users.noreply.github.com> Date: Wed, 14 Oct 2026 13:26:15 +0100 Subject: [PATCH 1/7] Write an implementation and tests for Counting task --- practice-tdd/count.js | 8 +++++++- practice-tdd/count.test.js | 7 +++++++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/practice-tdd/count.js b/practice-tdd/count.js index 5518c5712..ae1557777 100644 --- a/practice-tdd/count.js +++ b/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; } diff --git a/practice-tdd/count.test.js b/practice-tdd/count.test.js index cb3aaae59..734b73fb1 100644 --- a/practice-tdd/count.test.js +++ b/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 zero occurrences of a character", () => { + const str = "aaaa"; + const char = "b"; + const count = countChar(str, char); + expect(count).toEqual(0); +}); From 0f801bb656332b485119d9dcb4b1b0fbe6584949 Mon Sep 17 00:00:00 2001 From: Diana <40689028+ausiejute@users.noreply.github.com> Date: Wed, 14 Oct 2026 14:49:03 +0100 Subject: [PATCH 2/7] Implement and write tests for Repeat String task --- practice-tdd/repeat-str.js | 21 +++++++++++++++++---- practice-tdd/repeat-str.test.js | 20 ++++++++++++++++++++ 2 files changed, 37 insertions(+), 4 deletions(-) diff --git a/practice-tdd/repeat-str.js b/practice-tdd/repeat-str.js index af273f3b0..4fe709b4a 100644 --- a/practice-tdd/repeat-str.js +++ b/practice-tdd/repeat-str.js @@ -1,5 +1,18 @@ -export 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). - // The goal is to re-implement that function, not to use it. - return "hellohellohello"; +// 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.# +export function repeatStr(str, count) { + if (Number.isInteger(count) && count < 0) { + throw new Error(`Invalid input`); + } + if (count === 0) { + return ""; + } + + if (Number.isInteger(count) && count > 0) { + let result = ""; + for (let i = 0; i < count; i++) { + result += str; + } + return result; + } } diff --git a/practice-tdd/repeat-str.test.js b/practice-tdd/repeat-str.test.js index 8a7036102..5842ea16d 100644 --- a/practice-tdd/repeat-str.test.js +++ b/practice-tdd/repeat-str.test.js @@ -21,12 +21,32 @@ 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 1 time", () => { + 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 0 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 an error for negative count", () => { + const str = "hello"; + const count = -2; + expect(() => repeatStr(str, count)).toThrow("Invalid input"); +}); From 714b6fa00184d6db31278b9bea93119bfaaea9ef Mon Sep 17 00:00:00 2001 From: Diana <40689028+ausiejute@users.noreply.github.com> Date: Thu, 15 Oct 2026 10:52:35 +0100 Subject: [PATCH 3/7] Write tests and implement the function for Get Ordinal Number task --- practice-tdd/get-ordinal-number.js | 24 ++++++++++++++++++++++- practice-tdd/get-ordinal-number.test.js | 26 +++++++++++++++++++++++++ 2 files changed, 49 insertions(+), 1 deletion(-) diff --git a/practice-tdd/get-ordinal-number.js b/practice-tdd/get-ordinal-number.js index 5c6291f5e..873379131 100644 --- a/practice-tdd/get-ordinal-number.js +++ b/practice-tdd/get-ordinal-number.js @@ -1,3 +1,25 @@ export function getOrdinalNumber(num) { - return "1st"; + if (num === null || num === undefined || num === "" || num < 0) { + throw new Error("Invalid input!"); + } + + if (typeof num !== "number" || !isFinite(num)) { + throw new Error("Invalid input!"); + } + + const lastDigit = num % 10; + const lastTwoDigits = num % 100; + + 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`; + } + return `${num}th`; } diff --git a/practice-tdd/get-ordinal-number.test.js b/practice-tdd/get-ordinal-number.test.js index e23174a18..c97260a92 100644 --- a/practice-tdd/get-ordinal-number.test.js +++ b/practice-tdd/get-ordinal-number.test.js @@ -18,3 +18,29 @@ 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(32)).toEqual("32nd"); + expect(getOrdinalNumber(102)).toEqual("102nd"); +}); + +test("should append 'rd' for numbers ending with 3, except those ending with 13", () => { + expect(getOrdinalNumber(3)).toEqual("3rd"); + expect(getOrdinalNumber(53)).toEqual("53rd"); + expect(getOrdinalNumber(123)).toEqual("123rd"); +}); + +test("should append 'th' for the rest of the numbers", () => { + expect(getOrdinalNumber(9)).toEqual("9th"); + expect(getOrdinalNumber(20)).toEqual("20th"); + expect(getOrdinalNumber(108)).toEqual("108th"); +}); + +test("should throw an error if the input is invalid", () => { + expect(() => getOrdinalNumber("")).toThrow("Invalid input!"); + expect(() => getOrdinalNumber("fifty two")).toThrow("Invalid input!"); + expect(() => getOrdinalNumber(-3)).toThrow("Invalid input!"); + expect(() => getOrdinalNumber(null)).toThrow("Invalid input!"); + expect(() => getOrdinalNumber(undefined)).toThrow("Invalid input!"); +}); From 780bc1c839b0d9f2a861396cb888b62999e63871 Mon Sep 17 00:00:00 2001 From: Diana <40689028+ausiejute@users.noreply.github.com> Date: Tue, 20 Oct 2026 12:05:13 +0100 Subject: [PATCH 4/7] Add a test for an empty input --- practice-tdd/count.test.js | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/practice-tdd/count.test.js b/practice-tdd/count.test.js index 734b73fb1..20d81ebcd 100644 --- a/practice-tdd/count.test.js +++ b/practice-tdd/count.test.js @@ -29,3 +29,10 @@ test("should count zero occurrences of a character", () => { const count = countChar(str, char); expect(count).toEqual(0); }); + +test("should return 0 for no input", () => { + const str = ""; + const char = "b"; + const count = countChar(str, char); + expect(count).toEqual(0); +}); From 93fb5689563ee6b5f34dae5efec659fb1c458125 Mon Sep 17 00:00:00 2001 From: Diana <40689028+ausiejute@users.noreply.github.com> Date: Tue, 20 Oct 2026 12:16:48 +0100 Subject: [PATCH 5/7] Add a missing test for 11-13th floor --- practice-tdd/get-ordinal-number.test.js | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/practice-tdd/get-ordinal-number.test.js b/practice-tdd/get-ordinal-number.test.js index c97260a92..be3fcf0f2 100644 --- a/practice-tdd/get-ordinal-number.test.js +++ b/practice-tdd/get-ordinal-number.test.js @@ -31,6 +31,12 @@ test("should append 'rd' for numbers ending with 3, except those ending with 13" expect(getOrdinalNumber(123)).toEqual("123rd"); }); +test("should append 'th for special cases 11, 12, 13", () => { + expect(getOrdinalNumber(11)).toEqual("11th"); + expect(getOrdinalNumber(12)).toEqual("12th"); + expect(getOrdinalNumber(13)).toEqual("13th"); +}); + test("should append 'th' for the rest of the numbers", () => { expect(getOrdinalNumber(9)).toEqual("9th"); expect(getOrdinalNumber(20)).toEqual("20th"); From aebac3e66e63ca21517bdc04e7a87e1008ecb1e4 Mon Sep 17 00:00:00 2001 From: Diana <40689028+ausiejute@users.noreply.github.com> Date: Tue, 20 Oct 2026 12:46:53 +0100 Subject: [PATCH 6/7] Add a more specific test for multiple occurences of a character --- practice-tdd/count.test.js | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/practice-tdd/count.test.js b/practice-tdd/count.test.js index 20d81ebcd..0f3f9eb6a 100644 --- a/practice-tdd/count.test.js +++ b/practice-tdd/count.test.js @@ -17,6 +17,13 @@ test("should count multiple occurrences of a character", () => { expect(count).toEqual(5); }); +test("should count multiple occurences of a character in a multiple character string", () => { + const str = "banana"; + const char = "a"; + const count = countChar(str, char); + expect(count).toEqual(3); +}); + // Scenario: No Occurrences // Given the input string `str`, // And a character `char` that does not exist within `str`. From 005c5789f2f2636db4aa9431388c644bf370e8ed Mon Sep 17 00:00:00 2001 From: Diana <40689028+ausiejute@users.noreply.github.com> Date: Tue, 20 Oct 2026 12:57:09 +0100 Subject: [PATCH 7/7] Add a test for a case of an empty string input --- practice-tdd/repeat-str.test.js | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/practice-tdd/repeat-str.test.js b/practice-tdd/repeat-str.test.js index 5842ea16d..e3a684e53 100644 --- a/practice-tdd/repeat-str.test.js +++ b/practice-tdd/repeat-str.test.js @@ -40,6 +40,13 @@ test("should repeat the string 0 times", () => { expect(repeatedStr).toEqual(""); }); +test("should repeat the string 0 times", () => { + const str = ""; + 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,