Brussels | ITP-2025-1 | Preeti Tyagi | Week 6 | Sprint 3 Coursework/sprint-3-practice-tdd

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

@@ -1,5 +1,15 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+ let num = 0;
+  if (findCharacter) {
+    for (let i = 0; i < stringOfCharacters.length; i++) {
+      if (stringOfCharacters[i] === findCharacter) {
+        num++;
+      }
+    }
+    return `${findCharacter} appears ${num} time(s).`;
+  } else return 0;
 }
 
+// console.log(countChar("Hello", "l"));
+
 module.exports = countChar;

Sprint-3/2-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 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 a character that does not exist", () => {
+  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 +1,11 @@
 function getOrdinalNumber(num) {
+  if (num > 1 || num < 1) {
+    return "No 1st";
+  }
+
   return "1st";
 }
 
+console.log(getOrdinalNumber(1));
+
 module.exports = getOrdinalNumber;

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

@@ -1,13 +1,16 @@
-const getOrdinalNumber = require("./get-ordinal-number");
-// In this week's prep, we started implementing getOrdinalNumber
+function getOrdinalNumber(num) {
+  const remainder10 = num % 10;
+  const remainder100 = num % 100;
 
-// continue testing and implementing getOrdinalNumber for additional cases
-// Write your tests using Jest - remember to run your tests often for continual feedback
+  if (remainder10 === 1 && remainder100 !== 11) {
+    return `${num}st`;
+  } else if (remainder10 === 2 && remainder100 !== 12) {
+    return `${num}nd`;
+  } else if (remainder10 === 3 && remainder100 !== 13) {
+    return `${num}rd`;
+  } else {
+    return `${num}th`;
+  }
+}
 
-// Case 1: Identify the ordinal number for 1
-// When the number is 1,
-// Then the function should return "1st"
-
-test("should return '1st' for 1", () => {
-  expect(getOrdinalNumber(1)).toEqual("1st");
-});
+module.exports = getOrdinalNumber;

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

@@ -1,5 +1,5 @@
-function repeat() {
-  return "hellohellohello";
+function repeat(str, times) {
+  return str.repeat(times);
 }
 
 module.exports = repeat;

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

@@ -1,32 +1,32 @@
-// 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.
 
+// case: repeat String
 test("should repeat the string count times", () => {
   const str = "hello";
   const count = 3;
   const repeatedStr = repeat(str, count);
   expect(repeatedStr).toEqual("hellohellohello");
 });
 
-// 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 1
+test("should return the original string when count is 1", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("hello");
+});
 
-// 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.
+// case: Handle Count of 0
+test("should return an empty string when count is 0", () => {
+  const str = "hello";
+  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.
+// case: Negative Count
+test("should throw an error when count is negative", () => {
+  const str = "hello";
+  const count = -2;
+  expect(() => repeat(str, count)).toThrow("Count must be a non-negative integer");
+});