London | JAN-2026 ITP | Asha Ahmed | Sprint 3 | implement and rewrite tests coursework

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

@@ -15,9 +15,29 @@
 // execute the code to ensure all tests pass.
 
 function getAngleType(angle) {
-  // TODO: Implement this function
+  if (angle > 0 && angle < 90) {
+    return "Acute angle";
+  } else if (angle === 90) {
+    return "Right 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 "Invalid angle";
+  }
 }
 
+console.assert(getAngleType(45) === "Acute angle");
+console.assert(getAngleType(90) === "Right angle");
+console.assert(getAngleType(120) === "Obtuse angle");
+console.assert(getAngleType(180) === "Straight angle");
+console.assert(getAngleType(270) === "Reflex angle");
+console.assert(getAngleType(0) === "Invalid angle");
+console.assert(getAngleType(360) === "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 +55,27 @@ function assertEquals(actualOutput, targetOutput) {
 // Example: Identify Right Angles
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+
+// Example: Identify Acute Angles
+const acute = getAngleType(45);
+assertEquals(acute, "Acute angle");
+
+// Example: Identify Obtuse Angles
+const obtuse = getAngleType(120);
+assertEquals(obtuse, "Obtuse angle");
+
+// Example: Identify Straight Angles
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
+
+// Example: Identify Reflex Angles
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");
+
+// Example: Identify Invalid Angles
+const invalid1 = getAngleType(0);
+assertEquals(invalid1, "Invalid angle");
+
+// Example: Identify Invalid Angles
+const invalid2 = getAngleType(360);
+assertEquals(invalid2, "Invalid angle");

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

@@ -12,6 +12,13 @@
 
 function isProperFraction(numerator, denominator) {
   // TODO: Implement this function
+  if (denominator <= 0) {
+    return false;
+  }
+  if (numerator < denominator && numerator >= 0) {
+    return true;
+  }
+  return false;
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -31,3 +38,27 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+
+// Example: 3/5 is a proper fraction
+assertEquals(isProperFraction(3, 5), true);
+
+// Example: 1/100 is a proper fraction
+assertEquals(isProperFraction(1, 100), true);
+
+// Example: 5/2 is not a proper fraction
+assertEquals(isProperFraction(5, 2), false);
+
+// Example: 7/7 is an improper fraction
+assertEquals(isProperFraction(7, 7), false);
+
+// Example: 8/3 is an improper fraction
+assertEquals(isProperFraction(8, 3), false);
+
+// Example: 5/0 is an invalid fraction
+assertEquals(isProperFraction(5, 0), false);
+
+// Example: 2/-6 is an invalid fraction
+assertEquals(isProperFraction(2, -6), false);
+
+// Example: -1/4 is an invalid fraction
+assertEquals(isProperFraction(-1, 4), false);

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

@@ -23,6 +23,14 @@
 
 function getCardValue(card) {
   // TODO: Implement this function
+  if (!["♠", "♣", "♦", "♥"].includes(card.slice(-1)))
+    throw new Error("Invalid card rank.");
+  const rank = card.slice(0, card.length - 1);
+  if (rank === "A") return 11;
+  if (["10", "J", "Q", "K"].includes(rank)) return 10;
+  if (["2", "3", "4", "5", "6", "7", "8", "9"].includes(rank))
+    return Number(rank);
+  throw new Error("Invalid card rank.");
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -41,6 +49,12 @@ function assertEquals(actualOutput, targetOutput) {
 // Examples:
 assertEquals(getCardValue("9♠"), 9);
 
+assertEquals(getCardValue("6♥"), 6);
+
+assertEquals(getCardValue("J♣"), 10);
+
+assertEquals(getCardValue("A♦"), 11);
+
 // Handling invalid cards
 try {
   getCardValue("invalid");
@@ -50,3 +64,33 @@ try {
 } catch (e) {}
 
 // What other invalid card cases can you think of?
+
+try {
+  getCardValue("9K");
+
+  console.log("Error was not thrown for invalid card");
+} catch (error) {}
+
+try {
+  getCardValue("");
+
+  console.log("Error was not thrown for invalid card");
+} catch (error) {}
+
+try {
+  getCardValue("ABC");
+
+  console.log("Error was not thrown for invalid card");
+} catch (error) {}
+
+try {
+  getCardValue("A");
+
+  console.log("Error was not thrown for invalid card");
+} catch (error) {}
+
+try {
+  getCardValue("JK");
+
+  console.log("Error was not thrown for invalid card");
+} catch (error) {}

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

@@ -14,7 +14,32 @@ 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 identify obtuse angle (90° < angle < 180°)", () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(130)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
 // Case 4: Straight angle
+test("should identify straight angle (angle = 180°)", () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
 // Case 5: Reflex angles
+test("should identify reflex angle (180° < angle < 360)", () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(280)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
+
 // Case 6: Invalid angles
+test("should identify invalid angle (angle <= 0 or angle >= 360)", () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(361)).toEqual("Invalid angle");
+});

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

@@ -4,7 +4,69 @@ 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
+// Special case: denominator is zero
 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 non-zero", () => {
+  expect(isProperFraction(0, 5)).toEqual(true);
+});
+
+test("should return false when both numerator and denominator are zero", () => {
+  expect(isProperFraction(0, 0)).toEqual(false);
+});
+
+// Special case: Identify proper Fractions:
+test("should return true for proper fraction", () => {
+  expect(isProperFraction(2, 3)).toEqual(true);
+});
+
+// Special case: Identify Negative Fractions:
+test("should return true for proper negative fraction", () => {
+  expect(isProperFraction(-3, 6)).toEqual(true);
+});
+
+test("should return false for improper negative fraction", () => {
+  expect(isProperFraction(-5, 2)).toEqual(false);
+});
+
+test("should return true for proper fraction with negative denominator", () => {
+  expect(isProperFraction(2, -5)).toEqual(true);
+});
+
+test("should return false for improper fraction with negative denominator", () => {
+  expect(isProperFraction(7, -3)).toEqual(false);
+});
+
+// Special case: Identify Equal Numerator and Denominator:
+test("should return false for improper fraction (numerator === denominator)", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});
+
+// Special case: Identify both Numerator and Denominator as negative
+test("should return true when both numerator and denominator are negative and proper", () => {
+  expect(isProperFraction(-2, -5)).toEqual(true);
+});
+
+test("should return false when both numerator and denominator are negative and improper", () => {
+  expect(isProperFraction(-6, -3)).toEqual(false);
+});
+
+// Special case: Identify both Numerator and Denominator as decimal
+test("should return true for proper decimal fractions", () => {
+  expect(isProperFraction(1.5, 2.5)).toEqual(true);
+});
+
+test("should return false for improper decimal fractions", () => {
+  expect(isProperFraction(2.5, 1.5)).toEqual(false);
+});
+
+// Special case: Identify both Numerator and Denominator as large numbers
+test("should return true for large proper fractions", () => {
+  expect(isProperFraction(100, 1000)).toEqual(true);
+});
+
+test("should return false for large improper fractions", () => {
+  expect(isProperFraction(1000, 100)).toEqual(false);
+});

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

@@ -7,6 +7,74 @@ 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);
+});
+
+// Case 2: Handle Number Cards (2-10):
+test("should return the appropriate number from 2 to 10", () => {
+  expect(getCardValue("2♥")).toEqual(2);
+  expect(getCardValue("3♥")).toEqual(3);
+  expect(getCardValue("4♥")).toEqual(4);
+  expect(getCardValue("5♥")).toEqual(5);
+  expect(getCardValue("6♥")).toEqual(6);
+  expect(getCardValue("7♥")).toEqual(7);
+  expect(getCardValue("8♥")).toEqual(8);
+  expect(getCardValue("9♥")).toEqual(9);
+  expect(getCardValue("10♥")).toEqual(10);
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("3♠")).toEqual(3);
+  expect(getCardValue("4♠")).toEqual(4);
+  expect(getCardValue("5♠")).toEqual(5);
+  expect(getCardValue("6♠")).toEqual(6);
+  expect(getCardValue("7♠")).toEqual(7);
+  expect(getCardValue("8♠")).toEqual(8);
+  expect(getCardValue("9♠")).toEqual(9);
+  expect(getCardValue("10♠")).toEqual(10);
+  expect(getCardValue("2♦")).toEqual(2);
+  expect(getCardValue("3♦")).toEqual(3);
+  expect(getCardValue("4♦")).toEqual(4);
+  expect(getCardValue("5♦")).toEqual(5);
+  expect(getCardValue("6♦")).toEqual(6);
+  expect(getCardValue("7♦")).toEqual(7);
+  expect(getCardValue("8♦")).toEqual(8);
+  expect(getCardValue("9♦")).toEqual(9);
+  expect(getCardValue("10♦")).toEqual(10);
+  expect(getCardValue("2♣")).toEqual(2);
+  expect(getCardValue("3♣")).toEqual(3);
+  expect(getCardValue("4♣")).toEqual(4);
+  expect(getCardValue("5♣")).toEqual(5);
+  expect(getCardValue("6♣")).toEqual(6);
+  expect(getCardValue("7♣")).toEqual(7);
+  expect(getCardValue("8♣")).toEqual(8);
+  expect(getCardValue("9♣")).toEqual(9);
+  expect(getCardValue("10♣")).toEqual(10);
+});
+
+// Case 3: Handle 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);
+  expect(getCardValue("J♦")).toEqual(10);
+  expect(getCardValue("Q♦")).toEqual(10);
+  expect(getCardValue("K♦")).toEqual(10);
+  expect(getCardValue("J♣")).toEqual(10);
+  expect(getCardValue("Q♣")).toEqual(10);
+  expect(getCardValue("K♣")).toEqual(10);
+  expect(getCardValue("J♥")).toEqual(10);
+  expect(getCardValue("Q♥")).toEqual(10);
+  expect(getCardValue("K♥")).toEqual(10);
+});
+
+// Case 4: Handle Invalid Cards:
+test("Should return 'Invalid card rank.' for invalid cards", () => {
+  expect(() => getCardValue("KJ")).toThrow("Invalid card rank.");
+  expect(() => getCardValue("AK")).toThrow("Invalid card rank.");
+  expect(() => getCardValue("  ")).toThrow("Invalid card rank.");
+  expect(() => getCardValue("S♠")).toThrow("Invalid card rank.");
+  expect(() => getCardValue("J♠♠")).toThrow("Invalid card rank.");
 });
 
 // Suggestion: Group the remaining test data into these categories:
@@ -17,4 +85,3 @@ test(`Should return 11 when given an ace card`, () => {
 // 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
-