London | 26-ITP-May | Liridona Shehu | Sprint 3 | Coursework/Sprint-3-Practice-TDD

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

@@ -1,5 +1,13 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  //count the occurrences of the char in the string
+  // Make it case insensitive
+  let countChar = 0;
+  for (const char of stringOfCharacters) {
+    if (char.toLowerCase() === findCharacter.toLowerCase()) {
+      countChar++;
+    }
+  }
+  return countChar;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,38 @@ 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 return 0 if the character in not in the given string", () => {
+  const str = "aaaaa";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should return 1 if the is 1 occurrence of the char in the string", () => {
+  const str = "abc";
+  const char = "c";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+test("should return 0 if there is a empty string ", () => {
+  const str = "";
+  const char = "c";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should return 0 if character is empty", () => {
+  const str = "abcdefg";
+  const char = "";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should be case insensitive ", () => {
+  const str = "Successful";
+  const char = "s";
+  const count = countChar(str, char);
+  expect(count).toEqual(3);
+});

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

@@ -1,5 +1,15 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  let lastTwoDigits = num % 100;
+  let lastDigit = num % 10;
+  if (lastTwoDigits === 11 || lastTwoDigits === 12 || lastTwoDigits === 13) {
+    return num + "th";
+  } else 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;

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

@@ -14,7 +14,24 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // 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(11)).toEqual("11th");
   expect(getOrdinalNumber(1)).toEqual("1st");
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+// Case 2: Numbers ending with 2 (but not 12)
+test("should append  'nd' for numbers ending with 2, except those ending with 12", () => {
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+  expect(getOrdinalNumber(32)).toEqual("32nd");
+  expect(getOrdinalNumber(332)).toEqual("332nd");
+});
+
+// Case 3: Numbers ending with 3 (but not 13)
+test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(453)).toEqual("453rd");
+});

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

@@ -1,7 +1,16 @@
-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.
+
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("Count must not be negative");
+  }
+  let newString = "";
+  for (let i = 0; i < count; i++) {
+    newString += str;
+  }
+
+  return newString;
 }
 
 module.exports = repeatStr;

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

@@ -21,12 +21,30 @@ 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("throws an error when  count is a negative value", () => {
+  const str = "hello";
+  const count = -1;
+  expect(() => repeatStr(str, count)).toThrow("Count must not be negative");
+});