London | ITP-JAN-2026 | Said Fayaz Sadat | Sprint 3 | coursework/sprint-3

Sprint-3/1-implement-and-rewrite-tests/implement/1-get-angle-type.js

@@ -15,7 +15,22 @@
 // execute the code to ensure all tests pass.
 
 function getAngleType(angle) {
-  // TODO: Implement this function
+  if (angle > 0 && angle < 90) {
+    return "Acute angle";
+  }
+  if (angle === 90) {
+    return "Right angle";
+  }
+  if (angle > 90 && angle < 180) {
+    return "Obtuse angle";
+  }
+  if (angle === 180) {
+    return "Straight angle";
+  }
+  if (angle > 180 && angle < 360) {
+    return "Reflex angle";
+  }
+  return "Invalid angle";
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -35,3 +50,21 @@ function assertEquals(actualOutput, targetOutput) {
 // Example: Identify Right Angles
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+
+const acute = getAngleType(45);
+assertEquals(acute, "Acute angle");
+
+const obtuse = getAngleType(135);
+assertEquals(obtuse, "Obtuse angle");
+
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
+
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");
+
+const invalid = getAngleType(-45);
+assertEquals(invalid, "Invalid angle");
+
+const invalid2 = getAngleType(361);
+assertEquals(invalid2, "Invalid angle");

Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js

@@ -12,6 +12,16 @@
 
 function isProperFraction(numerator, denominator) {
   // TODO: Implement this function
+  if (denominator === 0) {
+    return false;
+  }
+  if (numerator < 0 && denominator < 0) {
+    return Math.abs(numerator) < Math.abs(denominator);
+  }
+  if (numerator < 0 || denominator < 0) {
+    return false;
+  }
+  return numerator < denominator;
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -31,3 +41,10 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(2, 1), false);
+assertEquals(isProperFraction(0, 1), true);
+assertEquals(isProperFraction(-1, 2), false);
+assertEquals(isProperFraction(1, -2), false);
+assertEquals(isProperFraction(-1, -2), false);
+assertEquals(isProperFraction(3, 4), true);
+assertEquals(isProperFraction(4, 3), false);

Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js

@@ -23,6 +23,15 @@
 
 function getCardValue(card) {
   // TODO: Implement this function
+  const rank = card.slice(0, -1);
+  const suit = card.slice(-1);
+  if (rank === "A") {
+    return 11;
+  }
+  if (rank === "J" || rank === "Q" || rank === "K") {
+    return 10;
+  }
+  return parseInt(rank);
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -50,3 +59,12 @@ try {
 } catch (e) {}
 
 // What other invalid card cases can you think of?
+assertEquals(getCardValue("A"), 11); // Missing suit
+try {
+  getCardValue("11♠"); // Invalid rank
+  console.error("Error was not thrown for invalid rank");
+} catch (e) {}
+
+try {  getCardValue("9X"); // Invalid suit
+  console.error("Error was not thrown for invalid suit");
+} catch (e) {}

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js

@@ -14,7 +14,34 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
 });
 
 // Case 2: Right angle
+test(`should return "Right angle" when (angle === 90)`, () => {
+  expect(getAngleType(90)).toEqual("Right angle");
+});
+
 // Case 3: Obtuse angles
+test(`should return "Obtuse angle" when (90 < angle < 180)`, () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(135)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
 // Case 4: Straight angle
+test(`should return "Straight angle" when (angle === 180)`, () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
 // Case 5: Reflex angles
+test(`should return "Reflex angle" when (180 < angle < 360)`, () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(270)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
+
 // Case 6: Invalid angles
+test(`should return "Invalid angle" when (angle < 0)`, () => {
+  expect(getAngleType(-1)).toEqual("Invalid angle");
+});
+
+test(`should return "Invalid angle" when (angle > 360)`, () => {
+  expect(getAngleType(361)).toEqual("Invalid angle");
+});

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js

@@ -8,3 +8,11 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+
+test(`should return true when numerator is zero and denominator is positive`, () => {
+  expect(isProperFraction(0, 1)).toEqual(true);
+});
+
+test(`should return false when numerator is zero and denominator is negative`, () => {
+  expect(isProperFraction(0, -1)).toEqual(false);
+});

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js

@@ -11,8 +11,23 @@ test(`Should return 11 when given an ace card`, () => {
 
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
+test(`Should return the numeric value for number cards`, () => {
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("10♠")).toEqual(10);
+});
 //   Face Cards (J, Q, K)
+test(`Should return 10 for face cards`, () => {
+  expect(getCardValue("J♠")).toEqual(10);
+  expect(getCardValue("Q♠")).toEqual(10);
+  expect(getCardValue("K♠")).toEqual(10);
+});
 //   Invalid Cards
+test(`Should throw an error for invalid cards`, () => {
+  expect(() => getCardValue("invalid")).toThrow();
+  expect(() => getCardValue("A")).toThrow(); // Missing suit
+  expect(() => getCardValue("11♠")).toThrow(); // Invalid rank
+  expect(() => getCardValue("9X")).toThrow(); // Invalid suit
+});
 
 // To learn how to test whether a function throws an error as expected in Jest,
 // please refer to the Jest documentation:

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

@@ -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 in the string", () => {
+  const str = "hello world";
+  const char = "x";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+}); 

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

@@ -18,3 +18,32 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   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(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(132)).toEqual("132nd");
+});
+test("should append 'th' for numbers ending with 2 that are also ending with 12", () => {
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(112)).toEqual("112th");
+});
+
+// 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(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(133)).toEqual("133rd");
+});
+test("should append 'th' for numbers ending with 3 that are also ending with 13", () => {
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(113)).toEqual("113th");
+});
+
+// Case 4: All other numbers
+test("should append 'th' for all other numbers", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(5)).toEqual("5th");
+});

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

@@ -20,13 +20,29 @@ test("should repeat the string count times", () => {
 // Given a target string `str` and a `count` equal to 1,
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
+test("should return the original string when count is 1", () => {
+  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 return an empty string when count is 0", () => {
+  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("should throw an error when count is negative", () => { const str = "hello";
+  const count = -1;
+  expect(() => repeatStr(str, count)).toThrow();
+});

Sprint-3/3-dead-code/exercise-1.js

@@ -1,17 +1,13 @@
 // Find the instances of unreachable and redundant code - remove them!
 // The sayHello function should continue to work for any reasonable input it's given.
 
-let testName = "Jerry";
+let testName = "Aman";
 const greeting = "hello";
 
 function sayHello(greeting, name) {
-  const greetingStr = greeting + ", " + name + "!";
-  return `${greeting}, ${name}!`;
-  console.log(greetingStr);
+  return `${greeting}, ${name}!`; 
 }
 
-testName = "Aman";
-
-const greetingMessage = sayHello(greeting, testName);
+const greetingMessage = sayHello(greeting, testName); 
 
 console.log(greetingMessage); // 'hello, Aman!'

Sprint-3/3-dead-code/exercise-2.js

@@ -2,12 +2,9 @@
 // The countAndCapitalisePets function should continue to work for any reasonable input it's given, and you shouldn't modify the pets variable.
 
 const pets = ["parrot", "hamster", "horse", "dog", "hamster", "cat", "hamster"];
-const capitalisedPets = pets.map((pet) => pet.toUpperCase());
+
 const petsStartingWithH = pets.filter((pet) => pet[0] === "h");
 
-function logPets(petsArr) {
-  petsArr.forEach((pet) => console.log(pet));
-}
 
 function countAndCapitalisePets(petsArr) {
   const petCount = {};