West Midlands | ITP-Sept-2025 | Ali Naru | Sprint 3 | Coursework/sprint 3 implement and rewrite

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

@@ -8,11 +8,33 @@
 // Then, write the next test! :) Go through this process until all the cases are implemented
 
 function getAngleType(angle) {
+  // Case 1: Identify Right Angles
   if (angle === 90) {
     return "Right angle";
   }
-   // Run the tests, work out what Case 2 is testing, and implement the required code here.
-   // Then keep going for the other cases, one at a time.
+
+  // Case 2: Identify Acute Angles
+  if (angle < 90) {
+    return "Acute angle";
+  }
+
+  // Case 3: Identify Obtuse Angles
+  if (angle > 90 && angle < 180) {
+    return "Obtuse angle";
+  }
+
+  // Case 4: Identify Straight Angles
+  if (angle === 180) {
+    return "Straight angle";
+  }
+
+  // Case 5: Identify Reflex Angles
+  if (angle > 180 && angle < 360) {
+    return "Reflex angle";
+  }
+
+  // Optional: handle invalid angles
+  return "Invalid angle";
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -50,14 +72,18 @@ assertEquals(acute, "Acute angle");
 // 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
+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
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");
+
+console.log("All tests ran! If no errors, all passed.");

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

@@ -8,8 +8,11 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-  if (numerator < denominator) {
+  // Proper fraction if absolute numerator is less than denominator
+  if (Math.abs(numerator) < denominator) {
     return true;
+  } else {
+    return false;
   }
 }
 
@@ -46,14 +49,19 @@ assertEquals(improperFraction, false);
 // 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
+assertEquals(negativeFraction, true);
 
 // 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);
-// ====> complete with your assertion
+assertEquals(equalFraction, false);
 
 // Stretch:
 // What other scenarios could you test for?
+// Example: numerator = 0, denominator = 5 (0/5 is a proper fraction)
+const zeroNumerator = isProperFraction(0, 5);
+assertEquals(zeroNumerator, true);
+
+console.log("All tests ran! If no errors, all passed.");

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

@@ -7,10 +7,33 @@
 // 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) {
-  if (rank === "A") {
-    return 11;
+  // Extract rank (all characters except final suit emoji)
+  const rank = card.slice(0, -1);
+
+  // Mapping for face card values
+  const faceValues = {
+    J: 10,
+    Q: 10,
+    K: 10,
+    A: 11,
+  };
+
+  // If rank is a face card, return mapped value
+  if (faceValues[rank]) {
+    return faceValues[rank];
   }
+
+  // Valid number ranks 2–10 only
+  const validNumberRanks = ["2", "3", "4", "5", "6", "7", "8", "9", "10"];
+
+  if (validNumberRanks.includes(rank)) {
+    return Number(rank);
+  }
+
+  // Anything else = invalid
+  throw new Error("Invalid card rank");
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -26,32 +49,29 @@ function assertEquals(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
-
-// 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.
-
-// 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.
-
-// 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."
+
+// ---------------- TESTS ----------------
+
+// Handle Ace (A)
+const aceOfSpades = getCardValue("A♠");
+assertEquals(aceOfSpades, 11);
+
+// Handle Number Cards (2-9)
+const fiveOfHearts = getCardValue("5♥");
+assertEquals(fiveOfHearts, 5);
+
+// Handle 10
+const tenOfClubs = getCardValue("10♣");
+assertEquals(tenOfClubs, 10);
+
+// Handle Face Cards (J, Q, K)
+const queenOfDiamonds = getCardValue("Q♦");
+assertEquals(queenOfDiamonds, 10);
+
+// Handle invalid card
+try {
+  getCardValue("15♣"); // invalid rank
+  console.assert(false, "Expected error for invalid rank");
+} catch (e) {
+  console.assert(true);
+}

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

@@ -6,21 +6,30 @@ 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"
+test("should identify acute angle (<90°)", () => {
+  expect(getAngleType(45)).toEqual("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"
+test("should identify obtuse angle (>90° and <180°)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+});
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
+test("should identify 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("should identify reflex angle (>180° and <360°)", () => {
+  expect(getAngleType(270)).toEqual("Reflex angle");
+});

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

@@ -1,13 +1,94 @@
+// Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js
+
 // This statement loads the isProperFraction function you wrote in the implement directory.
 // We will use the same function, but write tests for it using Jest in this file.
 const isProperFraction = require("../implement/2-is-proper-fraction");
 
-test("should return true for a proper fraction", () => {
+test("should return true for a proper fraction (numerator < denominator)", () => {
   expect(isProperFraction(2, 3)).toEqual(true);
 });
 
 // Case 2: Identify Improper Fractions:
+// When the numerator is greater than or equal to the denominator,
+// Then the function should return false
+test("should return false for an improper fraction (numerator > denominator)", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+// When the numerator is negative but absolute value < denominator,
+// Then the function should return true
+test("should return true for a negative proper fraction (|numerator| < denominator)", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+// When the numerator is equal to the denominator,
+// Then the function should return false
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});
+
+// When the numerator is negative but |numerator| >= denominator,
+// Then the function should return false
+test("should return false for a negative improper fraction (|numerator| >= denominator)", () => {
+  expect(isProperFraction(-8, 7)).toEqual(false);
+});
+
+// When the numerator is zero,
+// Then the function should return true
+test("should return true when numerator is zero", () => {
+  expect(isProperFraction(0, 5)).toEqual(true);
+});
+
+// When the denominator is zero,
+// Then the function should throw an error
+test("should throw an error when denominator is zero", () => {
+  expect(() => {
+    isProperFraction(3, 0);
+  }).toThrow("Denominator cannot be zero");
+});
+
+// When the numerator or denominator is not an integer,
+// Then the function should throw an error
+test("should throw an error when numerator or denominator is not an integer", () => {
+  expect(() => {
+    isProperFraction(2.5, 4);
+  }).toThrow("Numerator and denominator must be integers");
+
+  expect(() => {
+    isProperFraction(3, "5");
+  }).toThrow("Numerator and denominator must be integers");
+});
+
+
+// Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js
+// This function takes a card string (e.g., "A♠", "10♥", "K♦") and returns its value in a game of cards.
+function getCardValue(card) {
+  // Extract rank by removing suit symbol (last character)
+  const rank = card.slice(0, -1);
+
+  // Map face cards to values
+  const faceValues = {
+    J: 10,
+    Q: 10,
+    K: 10,
+    A: 11,
+  };
+
+  // Return mapped value if rank is a face card
+  if (faceValues[rank]) {
+    return faceValues[rank];
+  }
+
+  // Convert to number and validate numeric cards (2–10)
+  const numericValue = Number(rank);
+  if (!isNaN(numericValue) && numericValue >= 2 && numericValue <= 10) {
+    return numericValue;
+  }
+
+  // Invalid card
+  throw new Error("Invalid card rank");
+}
+
+module.exports = getCardValue;

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

@@ -8,6 +8,32 @@ test("should return 11 for Ace of Spades", () => {
 });
 
 // Case 2: Handle Number Cards (2-10):
+// When the card is a number between 2 and 10,
+// Then the function should return the numeric value of the card
+test("should return numeric value for number cards 2-10", () => {
+  expect(getCardValue("5♥")).toEqual(5);
+  expect(getCardValue("10♦")).toEqual(10);
+});
+
 // Case 3: Handle Face Cards (J, Q, K):
+// When the card is J, Q, or K,
+// Then the function should return 10
+test("should return 10 for face cards J, Q, K", () => {
+  expect(getCardValue("J♣")).toEqual(10);
+  expect(getCardValue("Q♠")).toEqual(10);
+  expect(getCardValue("K♦")).toEqual(10);
+});
+
 // Case 4: Handle Ace (A):
+// When the card is an Ace,
+// Then the function should return 11
+test("should return 11 for Ace cards", () => {
+  expect(getCardValue("A♥")).toEqual(11);
+});
+
 // Case 5: Handle Invalid Cards:
+// When the card has an invalid rank,
+// Then the function should throw an error
+test("should throw an error for invalid cards", () => {
+  expect(() => getCardValue("Z♠")).toThrow("Invalid card rank.");
+});