Cape Town| 26-ITP-May|Enice Mutanda| Sprint 3 |Practice-Tdd

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

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

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

@@ -1,4 +1,5 @@
 // implement a function countChar that counts the number of times a character occurs in a string
+// 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,
 // When the countChar function is called with these inputs,
@@ -9,7 +10,6 @@ const countChar = require("./count");
 // 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`.
-
 test("should count multiple occurrences of a character", () => {
   const str = "aaaaa";
   const char = "a";
@@ -22,3 +22,9 @@ 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 when the character does not occur", () => {
+  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 +1,20 @@
 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;

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

@@ -9,12 +9,29 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // Instead of writing tests for individual numbers, consider grouping all possible input values
 // into meaningful categories. Then, select representative samples from each category to test.
 // This approach improves coverage and makes our tests easier to maintain.
+// Case 4: Numbers ending with 11, 12, or 13 (the exceptions)
+// These should always get "th", even though they end in 1, 2, or 3.
+
 
 // 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");
+// Case 4: Numbers ending with 11, 12, or 13 (the exceptions)
+// These should always get "th", even though they end in 1, 2, or 3.
+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: Numbers ending with 4-9, and 0
+// These should always get "th".
+test("should append 'th' for numbers ending with 0 or 4-9", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(15)).toEqual("15th");
+  expect(getOrdinalNumber(20)).toEqual("20th");
+  expect(getOrdinalNumber(100)).toEqual("100th");
+});