Manchester | 25-ITP-May | Jennifer Isidienu | Sprint 3 | Coursework/Sprint-3*

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

@@ -9,6 +9,10 @@
 
 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";
    // read to the end, complete line 36, then pass your test here
 }
 
@@ -43,14 +47,19 @@ 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);
+assertEquals(obtuse, "Obtuse angle");
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // 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"
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");
 // ====> write your test here, and then add a line to pass the test in the function above

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

@@ -8,7 +8,13 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
+  // A proper fraction has a non-zero denominator,
+  // and the absolute value of the numerator is less than the denominator.
+  if (denominator === 0) return false;
+  if (numerator < 0) numerator = -numerator;
+  if (denominator < 0) denominator = -denominator;
+  return numerator < denominator;
+
 }
 
 // here's our helper again
@@ -24,30 +30,61 @@ function assertEquals(actualOutput, 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.
+// 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);
 
 // 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.
+// 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);
 
 // 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.
+// 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);
+assertEquals(negativeFraction, true);
 // ====> 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.
+// 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 less than the denominator. The function should return true.
+const zeroNumerator = isProperFraction(0, 5);
+assertEquals(zeroNumerator, true);
+
+// Zero Denominator check:
+// Input: numerator = 3, denominator = 0
+// target output: false
+// Explanation: A fraction with a zero denominator is undefined, 
+// so the function should return false.
+const zeroDenominator = isProperFraction(3, 0);
+assertEquals(zeroDenominator, false);
+
+// Negative Denominator check:
+// Input: numerator = 3, denominator = -5
+// target output: true
+// Explanation: The fraction 3/-5 is a proper fraction because the absolute
+// value of the numerator is less than the absolute value of the denominator.
+// The function should return true.
+const negativeDenominator = isProperFraction(3, -5);
+assertEquals(negativeDenominator, true);

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

@@ -8,7 +8,22 @@
 // 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) {
+  // Extract the rank from the card string
+  const rank = card.slice(0, -1);
+  // If the rank is "A", return 11
     if (rank === "A") return 11;
+
+  // If the rank is a number between "2" and "10", return its numeric value
+    if (["2", "3", "4", "5", "6", "7", "8", "9", "10"].includes(rank)) {
+        return Number(rank); // Convert string to number
+    }
+
+  // If the rank is "J", "Q", or "K", return 10
+    if (["J", "Q", "K"].includes(rank)) return 10;
+
+  // If the rank is invalid, throw an error
+    throw new Error("Invalid card rank");
+
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -33,19 +48,45 @@ assertEquals(aceofSpades, 11);
 // 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♥");
+assertEquals(fiveofHearts, 5);
+
+const twoOfClubs = getCardValue("2♣");
+assertEquals(twoOfClubs, 2);
+
+const nineOfDiamonds = getCardValue("9♦");
+assertEquals(nineOfDiamonds, 9);
+
 // ====> 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.
+const tenOfSpades = getCardValue("10♠");
+assertEquals(tenOfSpades, 10);
+
+const jackOfDiamonds = getCardValue("J♦");
+assertEquals(jackOfDiamonds, 10);
+
+const queenOfSpades = getCardValue("Q♠");
+assertEquals(queenOfSpades, 10);
+
+const kingOfClubs = getCardValue("K♣");
+assertEquals(kingOfClubs, 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.
+const aceOfClubs = getCardValue("A♣");
+assertEquals(aceOfClubs, 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("X♠"); // Invalid card
+} catch (error) {
+  assertEquals(error.message, "Invalid card rank");
+}

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

@@ -1,7 +1,17 @@
 function getAngleType(angle) {
-  if (angle === 90) return "Right angle";
+  if (angle === 90) { return "Right angle";
   // replace with your completed function from key-implement
-
+  } else if (angle > 0 && angle < 90) {
+    return "Acute angle";
+  } else if (angle > 90 && angle < 180) {
+    return "Obtuse angle";
+  } else if (angle === 180) {
+    return "Straight angle";
+  } else if (angle > 180 && angle < 360) {
+    return "Reflex angle";
+  } else {
+    return undefined; // For invalid angles like negative or >= 360
+  }
 }
 
 
@@ -10,7 +20,6 @@ function getAngleType(angle) {
 
 
 
-
 // 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 

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

@@ -6,19 +6,22 @@ test("should identify right angle (90°)", () => {
 
 // REPLACE the comments with the tests
 // make your test descriptions as clear and readable as possible
+
+test("should identify acute angles (less than 90°)", () => {
+  expect(getAngleType(45)).toEqual("Acute angle");
+  expect(getAngleType(89)).toEqual("Acute angle");
+});
 
-// 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"
+test("should identify obtuse angles (greater than 90° and less than 180°)", () => {
+  expect(getAngleType(120)).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("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 angles (greater than 180° and less than 360°)", () => {
+  expect(getAngleType(200)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});

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

@@ -1,6 +1,10 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+  // Check for positive values and that numerator is less than denominator
+  if (numerator > 0 && denominator > 0 && numerator < denominator) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 module.exports = isProperFraction;

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

@@ -4,8 +4,16 @@ test("should return true for a proper fraction", () => {
   expect(isProperFraction(2, 3)).toEqual(true);
 });
 
-// Case 2: Identify Improper Fractions:
+test("should return false for an improper fraction (numerator > denominator)", () => {
+  expect(isProperFraction(5, 4)).toEqual(false);
+});
 
-// Case 3: Identify Negative Fractions:
+test("should return false for negative fractions", () => {
+  expect(isProperFraction(-2, 3)).toEqual(false);
+  expect(isProperFraction(2, -3)).toEqual(false);
+  expect(isProperFraction(-2, -3)).toEqual(false);
+});
 
-// Case 4: Identify Equal Numerator and Denominator:
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});

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

@@ -1,5 +1,15 @@
 function getCardValue(card) {
-    // replace with your code from key-implement
-    return 11;
+  if (!card || typeof card !== "string") return null;
+
+  const value = card.slice(0, -1); // Remove suit (last character)
+
+  if (value === "A") return 11;
+  if (["J", "Q", "K"].includes(value)) return 10;
+
+  const number = Number(value);
+  if (number >= 2 && number <= 10) return number;
+
+  return null; // Invalid card
 }
-module.exports = getCardValue;
+
+module.exports = getCardValue;

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

@@ -6,6 +6,46 @@ test("should return 11 for Ace of Spades", () => {
     });
 
 // Case 2: Handle Number Cards (2-10):
+test("should return correct value for number cards (2-10)", () => {
+  const twoOfClubs = getCardValue("2♣");
+  expect(twoOfClubs).toEqual(2);
+
+  const fiveOfDiamonds = getCardValue("5♦");
+  expect(fiveOfDiamonds).toEqual(5);
+
+  const tenOfHearts = getCardValue("10♥");
+  expect(tenOfHearts).toEqual(10);
+});
+
 // Case 3: Handle Face Cards (J, Q, K):
+test("should return 10 for face cards (J, Q, K)", () => {
+  const jackOfSpades = getCardValue("J♠");
+  expect(jackOfSpades).toEqual(10);
+
+  const queenOfClubs = getCardValue("Q♣");
+  expect(queenOfClubs).toEqual(10);
+
+  const kingOfDiamonds = getCardValue("K♦");
+  expect(kingOfDiamonds).toEqual(10);
+});
+
 // Case 4: Handle Ace (A):
+test("should return 11 for any Ace card", () => {
+  const aceOfClubs = getCardValue("A♣");
+  expect(aceOfClubs).toEqual(11);
+
+  const aceOfDiamonds = getCardValue("A♦");
+  expect(aceOfDiamonds).toEqual(11);
+
+  const aceOfHearts = getCardValue("A♥");
+  expect(aceOfHearts).toEqual(11);
+});
+
 // Case 5: Handle Invalid Cards:
+test("should return null for invalid cards", () => {
+  const invalidCard = getCardValue("1♠");
+  expect(invalidCard).toBeNull();
+
+  const emptyCard = getCardValue("");
+  expect(emptyCard).toBeNull();
+});

Sprint-3/3-mandatory-practice/implement/count.js

@@ -1,5 +1,13 @@
 function countChar(stringOfCharacters, findCharacter) {
-    return 5
+  if (!stringOfCharacters || !findCharacter) return 0;
+
+  let count = 0;
+  for (let char of stringOfCharacters) {
+    if (char === findCharacter) {
+      count++;
+    }
+  }
+  return count;
 }
 
-module.exports = countChar;
+module.exports = countChar;

Sprint-3/3-mandatory-practice/implement/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 if character does not exist in string", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});