West Midlands | ITP - SEPT | Jonathan Boahene | Sprint 3 |Practice TDD

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

@@ -1,5 +1,12 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+
+  for (let char of stringOfCharacters) {
+    if (char === findCharacter) {
+      count++;
+    }
+  }
+  return count; 
 }
 
 module.exports = countChar;

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

@@ -10,6 +10,7 @@ const countChar = require("./count");
 // When the function is called with these inputs,
 // Then it should correctly count overlapping occurrences of char (e.g., 'a' appears five times in 'aaaaa').
 
+
 test("should count multiple occurrences of a character", () => {
   const str = "aaaaa";
   const char = "a";
@@ -22,3 +23,17 @@ test("should count multiple occurrences of a character", () => {
 // And a character char that does not exist within the case-sensitive str,
 // When the function is called with these inputs,
 // Then it should return 0, indicating that no occurrences of the char were found in the case-sensitive str.
+
+test("should return 0 when character does not exist in the string", () => {
+  const str = "hello world";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+
+// Add case sensitivity tests
+test("should be case-sensitive", () => {
+  expect(countChar("AaAa", "A")).toEqual(2);
+  expect(countChar("AaAa", "a")).toEqual(2);
+});

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

@@ -1,5 +1,18 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  const lastTwo = num % 100;
+  const last = num % 10;
+
+  // Special exceptions: 11, 12, 13
+  if (lastTwo === 11 || lastTwo === 12 || lastTwo === 13) {
+    return `${num}th`;
+  }
+
+  // Regular cases
+  if (last === 1) return `${num}st`;
+  if (last === 2) return `${num}nd`;
+  if (last === 3) return `${num}rd`;
+
+  return `${num}th`;
 }
 
 module.exports = getOrdinalNumber;

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

@@ -8,6 +8,31 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // When the number is 1,
 // Then the function should return "1st"
 
-test("should return '1st' for 1", () => {
+test("append 'st' to numbers ending in 1, except those ending in 11", () => {
   expect(getOrdinalNumber(1)).toEqual("1st");
+  expect(getOrdinalNumber(101)).toEqual("101st");
+});
+
+//identify ordinal for nd
+test("append 'nd' to numbers ending in 2, except those ending in 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(132)).toEqual("132nd");
+});
+
+//identify ordinal for rd
+test("append 'rd' to numbers ending in 3, except those ending in 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+});
+
+//Special English Rule... 12, 13, 14 ending in "th"
+test("append 'th' to numbers that end in 11, 12, or 13", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+});
+
+//All other numbers => th
+test("append 'th' to all other numbers", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(100)).toEqual("100th");
 });

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

@@ -1,5 +1,14 @@
-function repeat() {
-  return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    throw new Error("Count must be non-negative");
+  }
+
+  let result = "";
+  for (let i = 0; i < count; i++) {
+    result += str;
+  }
+  return result;
 }
 
 module.exports = repeat;
+

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

@@ -1,32 +1,29 @@
 // Implement a function repeat
-const repeat = require("./repeat");
-// Given a target string str and a positive integer count,
-// When the repeat function is called with these inputs,
-// Then it should:
 
-// case: repeat String:
-// Given a target string str and a positive integer count,
-// When the repeat function is called with these inputs,
-// Then it should repeat the str count times and return a new string containing the repeated str values.
+const repeat = require("./repeat");
 
-test("should repeat the string count times", () => {
+// case: handle Count of 1:
+// When count = 1, return the original string unchanged
+test("should return original string when count is 1", () => {
   const str = "hello";
-  const count = 3;
+  const count = 1;
   const repeatedStr = repeat(str, count);
-  expect(repeatedStr).toEqual("hellohellohello");
+  expect(repeatedStr).toEqual("hello");
 });
 
-// case: handle Count of 1:
-// Given a target string str and a count equal to 1,
-// When the repeat function is called with these inputs,
-// Then it should return the original str without repetition, ensuring that a count of 1 results in no repetition.
-
 // case: Handle Count of 0:
-// Given a target string str and a count equal to 0,
-// When the repeat function is called with these inputs,
-// Then it should return an empty string, ensuring that a count of 0 results in an empty output.
+// When count = 0, return empty string
+test("should return an empty string when count is 0", () => {
+  const str = "world";
+  const count = 0;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("");
+});
 
 // case: Negative Count:
-// Given a target string str and a negative integer count,
-// When the repeat function is called with these inputs,
-// Then it should throw an error or return an appropriate error message, as negative counts are not valid.
+// When count < 0, throw an error
+test("should throw an error when count is negative", () => {
+  const str = "test";
+  const count = -3;
+  expect(() => repeat(str, count)).toThrow("Count must be non-negative");
+});