London | 26-ITP-May | Chinwe Chukwuma | Sprint 3 | implement-and-rewrite

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

@@ -16,8 +16,25 @@
 
 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.
 // This will be useful in the "rewrite tests with jest" step.
 module.exports = getAngleType;
@@ -35,3 +52,12 @@ function assertEquals(actualOutput, targetOutput) {
 // Example: Identify Right Angles
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+assertEquals(getAngleType(45), "Acute angle")
+assertEquals(getAngleType(120), "Obtuse angle");
+assertEquals(getAngleType(180), "Straight angle");
+assertEquals(getAngleType(270), "Reflex angle")
+assertEquals(getAngleType(-10), "Invalid angle")
+assertEquals(getAngleType(0), "Invalid angle");
+assertEquals(getAngleType(360), "Invalid angle");
+assertEquals(getAngleType(400), "Invalid angle");
+

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

@@ -12,8 +12,25 @@
 
 function isProperFraction(numerator, denominator) {
   // TODO: Implement this function
+ if (denominator <= 0) {
+    return false;
+  }
+  if (numerator < 0) {
+    return false;
+  }
+  return numerator < denominator;
 }
 
+/* A proper fraction is defined as a fraction where:
+- The numerator is less than the denominator.
+- The denominator is positive.
+
+Source: https://www.mathsisfun.com/proper-fractions.html
+*/
+
+
+
+
 // The line below allows us to load the isProperFraction function into tests in other files.
 // This will be useful in the "rewrite tests with jest" step.
 module.exports = isProperFraction;
@@ -31,3 +48,24 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+// Proper fractions
+assertEquals(isProperFraction(2, 3), true);
+assertEquals(isProperFraction(3, 4), true);
+assertEquals(isProperFraction(0, 5), true);
+
+// Improper fractions
+assertEquals(isProperFraction(5, 5), false);
+assertEquals(isProperFraction(7, 3), false);
+
+// Denominator zero
+assertEquals(isProperFraction(5, 0), false);
+
+// Negative numerators
+assertEquals(isProperFraction(-1, 2), false);
+
+// Negative denominators
+assertEquals(isProperFraction(1, -2), false);
+
+// Both negative
+assertEquals(isProperFraction(-3, -2), false);
+

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

@@ -23,6 +23,40 @@
 
 function getCardValue(card) {
   // TODO: Implement this function
+  const validRanks = [
+    "A",
+    "2",
+    "3",
+    "4",
+    "5",
+    "6",
+    "7",
+    "8",
+    "9",
+    "10",
+    "J",
+    "Q",
+    "K",
+  ];
+  const validSuits = ["♠", "♥", "♦", "♣"];
+
+  // Suit is always the last character
+  const suit = card.slice(-1);
+
+  // Rank is everything before the suit
+  const rank = card.slice(0, -1);
+
+  // Validate rank and suit
+  if (!validRanks.includes(rank) || !validSuits.includes(suit)) {
+    throw new Error("Invalid card");
+  }
+
+  // Convert rank to value
+  if (rank === "A") return 11;
+  if (["J", "Q", "K"].includes(rank)) return 10;
+
+  // Number card
+  return Number(rank);
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -40,6 +74,12 @@ function assertEquals(actualOutput, targetOutput) {
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
 // Examples:
 assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("A♣"), 11);
+assertEquals(getCardValue("J♦"), 10);
+assertEquals(getCardValue("Q♥"), 10);
+assertEquals(getCardValue("K♠"), 10);
+assertEquals(getCardValue("2♠"), 2);
+assertEquals(getCardValue("10♦"), 10);
 
 // Handling invalid cards
 try {
@@ -52,3 +92,30 @@ try {
 }
 
 // What other invalid card cases can you think of?
+try {
+  getCardValue("1♠"); // invalid rank
+  console.error("Error was not thrown for invalid rank");
+} catch (e) {
+  console.log("Error thrown for invalid rank 🎉");
+}
+
+try {
+  getCardValue("A?"); // invalid suit
+  console.error("Error was not thrown for invalid suit");
+} catch (e) {
+  console.log("Error thrown for invalid suit 🎉");
+}
+
+try {
+  getCardValue("10"); // missing suit
+  console.error("Error was not thrown for missing suit");
+} catch (e) {
+  console.log("Error thrown for missing suit 🎉");
+}
+
+try {
+  getCardValue(""); // empty string
+  console.error("Error was not thrown for empty string");
+} catch (e) {
+  console.log("Error thrown for empty string 🎉");
+}

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

@@ -14,7 +14,48 @@ 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(120)).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" for angles ≤ 0 or ≥ 360`, () => {
+  expect(getAngleType(-10)).toEqual("Invalid angle");
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(400)).toEqual("Invalid angle");
+});
+
+// Case 7: Decimal angles
+test(`should correctly classify decimal angles`, () => {
+  // valid decimal angles
+  expect(getAngleType(0.5)).toEqual("Acute angle");
+  expect(getAngleType(89.9)).toEqual("Acute angle");
+  expect(getAngleType(90.1)).toEqual("Obtuse angle");
+  expect(getAngleType(179.9)).toEqual("Obtuse angle");
+  expect(getAngleType(180.1)).toEqual("Reflex angle");
+  expect(getAngleType(359.9)).toEqual("Reflex angle");
+
+  // invalid decimal angles
+  expect(getAngleType(-0.5)).toEqual("Invalid angle");
+  expect(getAngleType(360.1)).toEqual("Invalid angle");
+});

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

@@ -4,7 +4,36 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 
 // TODO: Write tests in Jest syntax to cover all combinations of positives, negatives, zeros, and other categories.
 
-// Special case: numerator is zero
-test(`should return false when denominator is zero`, () => {
-  expect(isProperFraction(1, 0)).toEqual(false);
+// Denominator zero
+test("should return false when denominator is zero", () => {
+  expect(isProperFraction(1, 0)).toBe(false);
+});
+
+// Proper fractions
+test("should return true for proper fractions (numerator < denominator)", () => {
+  expect(isProperFraction(1, 2)).toBe(true);
+  expect(isProperFraction(2, 3)).toBe(true);
+  expect(isProperFraction(3, 4)).toBe(true);
+  expect(isProperFraction(0, 5)).toBe(true); // zero numerator is allowed
+});
+
+// Improper fractions
+test("should return false for improper fractions (numerator >= denominator)", () => {
+  expect(isProperFraction(5, 5)).toBe(false);
+  expect(isProperFraction(7, 3)).toBe(false);
+});
+
+// Negative numerators
+test("should return false when numerator is negative", () => {
+  expect(isProperFraction(-1, 2)).toBe(false);
+});
+
+// Negative denominators
+test("should return false when denominator is negative", () => {
+  expect(isProperFraction(1, -2)).toBe(false);
+});
+
+// Both negative
+test("should return false when both numerator and denominator are negative", () => {
+  expect(isProperFraction(-3, -2)).toBe(false);
 });

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

@@ -7,13 +7,39 @@ const getCardValue = require("../implement/3-get-card-value");
 // Case 1: Ace (A)
 test(`Should return 11 when given an ace card`, () => {
   expect(getCardValue("A♠")).toEqual(11);
+  expect(getCardValue("A♥")).toEqual(11);
+  expect(getCardValue("A♦")).toEqual(11);
+  expect(getCardValue("A♣")).toEqual(11);
 });
 
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
 //   Face Cards (J, Q, K)
 //   Invalid Cards
 
+// Case 2: Number cards (2–10)
+test("should return correct values for number cards", () => {
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("7♦")).toEqual(7);
+  expect(getCardValue("10♥")).toEqual(10);
+});
+
+// Case 3: 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);
+});
+
+// Case 4: Invalid cards
+test("should throw an error for invalid card values", () => {
+  expect(() => getCardValue("1♠")).toThrowError();
+  expect(() => getCardValue("Z♦")).toThrowError();
+  expect(() => getCardValue("")).toThrowError();
+  expect(() => getCardValue("♠")).toThrowError();
+});
+
+
 // To learn how to test whether a function throws an error as expected in Jest,
 // please refer to the Jest documentation:
 // https://jestjs.io/docs/expect#tothrowerror