Sheffield | May-2025 | WALEED-YAHYA SALIH-TAHA | Sprint-3

Sprint-3/1-key-implement/1-get-angle-type.js

@@ -9,6 +9,11 @@
 
 function getAngleType(angle) {
    if (angle === 90) return "Right angle";
+    if (angle < 90) return "Acute 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"; // Added to handle angles outside the range of 0 to 360 degrees
    // read to the end, complete line 36, then pass your test here
 }
 
@@ -19,6 +24,7 @@ function assertEquals(actualOutput, targetOutput) {
     actualOutput === targetOutput,
     `Expected ${actualOutput} to equal ${targetOutput}`
   );
+  return actualOutput === targetOutput; // Return true if the assertion passes
 }
 
 // Acceptance criteria:
@@ -30,8 +36,7 @@ function assertEquals(actualOutput, targetOutput) {
 // Case 1: Identify Right Angles:
 // When the angle is exactly 90 degrees,
 // Then the function should return "Right angle"
-const right = getAngleType(90);
-assertEquals(right, "Right angle");
+assertEquals(getAngleType(90), "Right angle");
 
 // Case 2: Identify Acute Angles:
 // When the angle is less than 90 degrees,
@@ -42,15 +47,20 @@ assertEquals(acute, "Acute angle");
 // Case 3: Identify Obtuse Angles:
 // When the angle is greater than 90 degrees and less than 180 degrees,
 // Then the function should return "Obtuse angle"
-const obtuse = getAngleType(120);
 // ====> write your test here, and then add a line to pass the test in the function above
+const obtuse = getAngleType(120);
+assertEquals(obtuse, "Obtuse angle");
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
 // ====> write your test here, and then add a line to pass the test in the function above
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
 
 // Case 5: Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
 // Then the function should return "Reflex angle"
-// ====> write your test here, and then add a line to pass the test in the function above
+// ====> write your test here, and then add a line to pass the test in the function above
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");

Sprint-3/1-key-implement/2-is-proper-fraction.js

@@ -8,9 +8,11 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
+  if (denominator === 0) return false; // Can't divide by zero
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
+
 // here's our helper again
 function assertEquals(actualOutput, targetOutput) {
   console.assert(
@@ -25,15 +27,13 @@ function assertEquals(actualOutput, targetOutput) {
 // Input: numerator = 2, denominator = 3
 // target output: true
 // Explanation: The fraction 2/3 is a proper fraction, where the numerator is less than the denominator. The function should return true.
-const properFraction = isProperFraction(2, 3);
-assertEquals(properFraction, true);
+assertEquals(isProperFraction(2, 3), true); // ✅ should pass
 
 // Improper Fraction check:
 // Input: numerator = 5, denominator = 2
 // target output: false
 // Explanation: The fraction 5/2 is an improper fraction, where the numerator is greater than or equal to the denominator. The function should return false.
-const improperFraction = isProperFraction(5, 2);
-assertEquals(improperFraction, false);
+assertEquals(isProperFraction(5, 2), false); // ✅ should pass
 
 // Negative Fraction check:
 // Input: numerator = -4, denominator = 7
@@ -47,7 +47,15 @@ const negativeFraction = isProperFraction(-4, 7);
 // target output: false
 // Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false.
 const equalFraction = isProperFraction(3, 3);
+assertEquals(equalFraction, false);
 // ====> complete with your assertion
 
 // Stretch:
 // What other scenarios could you test for?
+// Zero Numerator check:
+// Input: numerator = 0, denominator = 5
+// target output: true
+// Explanation: The fraction 0/5 is a proper fraction because the numerator is zero,
+// which is less than the denominator. The function should return true.
+const zeroNumerator = isProperFraction(0, 5);
+assertEquals(zeroNumerator, true); // ✅ should pass

Sprint-3/1-key-implement/3-get-card-value.js

@@ -8,7 +8,12 @@
 // write one test at a time, and make it pass, build your solution up methodically
 // just make one change at a time -- don't rush -- programmers are deep and careful thinkers
 function getCardValue(card) {
+    const rank = card.slice(0, -1); // Get the rank (everything except the last character)
     if (rank === "A") return 11;
+    if (["J", "Q", "K"].includes(rank)) return 10;
+    if (rank >= "2" && rank <= "9") return parseInt(rank, 10);
+    if (rank === "10") return 10; // Handle the 10 card explicitly
+    throw new Error("Invalid card rank");
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -34,18 +39,33 @@ assertEquals(aceofSpades, 11);
 // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
 const fiveofHearts = getCardValue("5♥");
 // ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(fiveofHearts, 5);
 
 // Handle Face Cards (J, Q, K):
 // Given a card with a rank of "10," "J," "Q," or "K",
 // When the function is called with such a card,
 // Then it should return the value 10, as these cards are worth 10 points each in blackjack.
+const jackOfDiamonds = getCardValue("J♦");
+assertEquals(jackOfDiamonds, 10);
+const queenOfClubs = getCardValue("Q♣");
+assertEquals(queenOfClubs, 10);
+const kingOfSpades = getCardValue("K♠");
+assertEquals(kingOfSpades, 10);
 
 // Handle Ace (A):
 // Given a card with a rank of "A",
 // When the function is called with an Ace,
 // Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack.
+// (Note: In some games, the Ace can also be worth 1 point, but for this function, we will assume it is always worth 11 points.)
+const aceOfDiamonds = getCardValue("A♦");
+assertEquals(aceOfDiamonds, 11);
 
 // Handle Invalid Cards:
 // Given a card with an invalid rank (neither a number nor a recognized face card),
 // When the function is called with such a card,
 // Then it should throw an error indicating "Invalid card rank."
+try {
+    getCardValue("Z♠"); // Invalid card
+} catch (error) {
+    console.assert(error.message === "Invalid card rank", "Expected error for invalid card rank");
+}

Sprint-3/2-mandatory-rewrite/1-get-angle-type.js

@@ -1,18 +1,24 @@
 function getAngleType(angle) {
-  if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
-}
-
-
-
-
-
+    if (angle <= 0 || angle >= 360) return "Invalid angle";
+    if (angle < 90) return "Acute angle";
+    if (angle === 90) return "Right angle";
+    if (angle < 180) return "Obtuse angle";
+    if (angle === 180) return "Straight angle";
+    return "Reflex angle"; // angle between 180 and 360
+};
 
 
 
 // Don't get bogged down in this detail
 // Jest uses CommonJS module syntax by default as it's quite old
 // We will upgrade our approach to ES6 modules in the next course module, so for now 
 // we have just written the CommonJS module.exports syntax for you
-module.exports = getAngleType;
+module.exports = getAngleType;
+console.log(getAngleType(45));   // Acute angle
+console.log(getAngleType(90));   // Right angle
+console.log(getAngleType(135));  // Obtuse angle
+console.log(getAngleType(180));  // Straight angle
+console.log(getAngleType(270));  // Reflex angle
+console.log(getAngleType(0));    // Invalid angle
+console.log(getAngleType(360));  // Invalid angle
+console.log(getAngleType(-10));  // Invalid angle

Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js

@@ -1,24 +1,41 @@
 const getAngleType = require("./1-get-angle-type");
 
+// Case 1: Identify Right Angles
 test("should identify right angle (90°)", () => {
   expect(getAngleType(90)).toEqual("Right angle");
 });
 
-// REPLACE the comments with the tests
-// make your test descriptions as clear and readable as possible
-
-// Case 2: Identify Acute Angles:
-// When the angle is less than 90 degrees,
-// Then the function should return "Acute angle"
-
-// Case 3: Identify Obtuse Angles:
-// When the angle is greater than 90 degrees and less than 180 degrees,
-// Then the function should return "Obtuse angle"
+// Case 2: Identify Acute Angles (less than 90°)
+test("should identify acute angles (< 90°)", () => {
+  expect(getAngleType(1)).toEqual("Acute angle");
+  expect(getAngleType(45)).toEqual("Acute angle");
+  expect(getAngleType(89)).toEqual("Acute angle");
+});
 
+// Case 3: Identify Obtuse Angles (90° < angle < 180°)
+test("should identify obtuse angles (between 90° and 180°)", () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(135)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
-
+test("straight angle (180°)", () => {
+expect(getAngleType(180)).toEqual("Straight angle");
+});
 // Case 5: Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
 // Then the function should return "Reflex angle"
+test("reflex angle (181°)", () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(270)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
+// Case 6: Handle invalid angles (≤ 0 or ≥ 360)
+test("should identify invalid angles (≤ 0 or ≥ 360)", () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(-45)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(400)).toEqual("Invalid angle");
+});

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js

@@ -2,5 +2,54 @@ function isProperFraction(numerator, denominator) {
     if (numerator < denominator) return true;
     // add your completed function from key-implement here
 }
+function isProperFraction(numerator, denominator) {
+  if (denominator === 0) return false; // Can't divide by zero
+  return Math.abs(numerator) < Math.abs(denominator);
+}
+
+
+// here's our helper again
+function assertEquals(actualOutput, targetOutput) {
+  console.assert(
+    actualOutput === targetOutput,
+    `Expected ${actualOutput} to equal ${targetOutput}`
+  );
+}
+// Proper Fraction check:
+// Input: numerator = 2, denominator = 3
+// target output: true
+// Explanation: The fraction 2/3 is a proper fraction, where the numerator is less than the denominator. The function should return true.
+assertEquals(isProperFraction(2, 3), true); // ✅ should pass
+
+// Improper Fraction check:
+// Input: numerator = 5, denominator = 2
+// target output: false
+// Explanation: The fraction 5/2 is an improper fraction, where the numerator is greater than or equal to the denominator. The function should return false.
+assertEquals(isProperFraction(5, 2), false); // ✅ should pass
+
+// Negative Fraction check:
+// Input: numerator = -4, denominator = 7
+// target output: true
+// Explanation: The fraction -4/7 is a proper fraction because the absolute value of the numerator (4) is less than the denominator (7). The function should return true.
+const negativeFraction = isProperFraction(-4, 7);
+// ====> complete with your assertion
+
+// Equal Numerator and Denominator check:
+// Input: numerator = 3, denominator = 3
+// target output: false
+// Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false.
+const equalFraction = isProperFraction(3, 3);
+assertEquals(equalFraction, false);
+// ====> complete with your assertion
+
+// Stretch:
+// What other scenarios could you test for?
+// Zero Numerator check:
+// Input: numerator = 0, denominator = 5
+// target output: true
+// Explanation: The fraction 0/5 is a proper fraction because the numerator is zero,
+// which is less than the denominator. The function should return true.
+const zeroNumerator = isProperFraction(0, 5);
+assertEquals(zeroNumerator, true); // ✅ should pass
 
 module.exports = isProperFraction;

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js

@@ -5,7 +5,16 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for an improper fraction", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for a negative proper fraction", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false for equal numerator and denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});

Sprint-3/2-mandatory-rewrite/3-get-card-value.js

@@ -1,5 +1,72 @@
+// This problem involves playing cards: https://en.wikipedia.org/wiki/Standard_52-card_deck
+
+// You will need to implement a function getCardValue
+// the function takes a single parameter, a string representing a playing card
+// the function should return the numerical value of the card
+// the first test and first case is written for you
+// complete the rest of the tests and cases
+// write one test at a time, and make it pass, build your solution up methodically
+// just make one change at a time -- don't rush -- programmers are deep and careful thinkers
 function getCardValue(card) {
-    // replace with your code from key-implement
-    return 11;
+    const rank = card.slice(0, -1); // Get the rank (everything except the last character)
+    if (rank === "A") return 11;
+    if (["J", "Q", "K"].includes(rank)) return 10;
+    if (rank >= "2" && rank <= "9") return parseInt(rank, 10);
+    if (rank === "10") return 10; // Handle the 10 card explicitly
+    throw new Error("Invalid card rank");
+}
+
+// You need to write assertions for your function to check it works in different cases
+// we're going to use this helper function to make our assertions easier to read
+// if the actual output matches the target output, the test will pass
+function assertEquals(actualOutput, targetOutput) {
+  console.assert(
+    actualOutput === targetOutput,
+    `Expected ${actualOutput} to equal ${targetOutput}`
+  );
+}
+// Acceptance criteria:
+
+// Given a card string in the format "A♠" (representing a card in blackjack - the last character will always be an emoji for a suit, and all characters before will be a number 2-10, or one letter of J, Q, K, A),
+// When the function getCardValue is called with this card string as input,
+// Then it should return the numerical card value
+const aceofSpades = getCardValue("A♠");
+assertEquals(aceofSpades, 11);
+
+// Handle Number Cards (2-10):
+// Given a card with a rank between "2" and "9",
+// When the function is called with such a card,
+// Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
+const fiveofHearts = getCardValue("5♥");
+// ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(fiveofHearts, 5);
+
+// Handle Face Cards (J, Q, K):
+// Given a card with a rank of "10," "J," "Q," or "K",
+// When the function is called with such a card,
+// Then it should return the value 10, as these cards are worth 10 points each in blackjack.
+const jackOfDiamonds = getCardValue("J♦");
+assertEquals(jackOfDiamonds, 10);
+const queenOfClubs = getCardValue("Q♣");
+assertEquals(queenOfClubs, 10);
+const kingOfSpades = getCardValue("K♠");
+assertEquals(kingOfSpades, 10);
+
+// Handle Ace (A):
+// Given a card with a rank of "A",
+// When the function is called with an Ace,
+// Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack.
+// (Note: In some games, the Ace can also be worth 1 point, but for this function, we will assume it is always worth 11 points.)
+const aceOfDiamonds = getCardValue("A♦");
+assertEquals(aceOfDiamonds, 11);
+
+// Handle Invalid Cards:
+// Given a card with an invalid rank (neither a number nor a recognized face card),
+// When the function is called with such a card,
+// Then it should throw an error indicating "Invalid card rank."
+try {
+    getCardValue("Z♠"); // Invalid card
+} catch (error) {
+    console.assert(error.message === "Invalid card rank", "Expected error for invalid card rank");
 }
 module.exports = getCardValue;