Brussels | ITP-2026-1 | Meysam Razagh | Sprint-3 | Practice TDD

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

@@ -1,5 +1,13 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let variable = 0; // moteghayer baraye shomaresh
+
+  for (let i = 0; i < stringOfCharacters.length; i++) {
+    if (stringOfCharacters[i] === findCharacter) {
+      variable++;
+    }
+  }
+
+  return variable;
 }
 
 module.exports = countChar;

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

@@ -1,5 +1,6 @@
 // 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,
 // Then it should:
@@ -22,3 +23,10 @@ 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 no occurrences are found", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,17 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  // Handle the 'teen' exceptions (11, 12, 13) that always end in 'th'
+  if (num % 100 >= 11 && num % 100 <= 13) {
+    return num + "th";
+  }
+
+  // Identify the last digit to determine the correct suffix for all other numbers
+  const lastDigit = num % 10;
+
+  if (lastDigit === 1) return num + "st";
+  if (lastDigit === 2) return num + "nd";
+  if (lastDigit === 3) return num + "rd";
+
+  return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -1,13 +1,38 @@
 const getOrdinalNumber = require("./get-ordinal-number");
-// In this week's prep, we started implementing getOrdinalNumber
 
-// continue testing and implementing getOrdinalNumber for additional cases
-// Write your tests using Jest - remember to run your tests often for continual feedback
+// Given a number,
+// When the getOrdinalNumber function is called with this input,
+// Then it should return the correct ordinal string.
 
 // 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");
 });
+
+// Case 2: Identify the ordinal number for 2
+test("should return '2nd' for 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+});
+
+// Case 3: Identify the ordinal number for 3
+test("should return '3rd' for 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+
+// Case 4: Handle other numbers
+test("should return 'th' for numbers other than 1, 2, or 3", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(10)).toEqual("10th");
+});
+// Case 5: Handle numbers ending in 1, 2, or 3 after 20
+test("should return '21st' for 21", () => {
+  expect(getOrdinalNumber(21)).toEqual("21st");
+});
+
+test("should return '22nd' for 22", () => {
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+});
+
+test("should return '23rd' for 23", () => {
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+});

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

@@ -1,5 +1,15 @@
-function repeat() {
-  return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    throw new Error("Count must be a non-negative integer");
+  }
+
+  let variable = ""; // inja natije ro jam mikonim
+
+  for (let i = 0; i < count; i++) {
+    variable += str;
+  }
+
+  return variable;
 }
 
 module.exports = repeat;

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

@@ -21,12 +21,26 @@ test("should repeat the string count times", () => {
 // 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.
 
+test("should return the original string when count is 1", () => {
+  expect(repeat("hello", 1)).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.
 
+test("should return an empty string when count is 0", () => {
+  expect(repeat("hello", 0)).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.
+
+test("should throw an error when count is negative", () => {
+  expect(() => {
+    repeat("hello", -1);
+  }).toThrow("Count must be a non-negative integer");
+});