Cape Town | sep-2026-ITP | Matthaus Bause | Sprint 2 | Implement and rewrite tests

implement-and-rewrite-tests/implement-tests-with-node-test/1-get-angle-type.test.js

@@ -10,3 +10,41 @@ test("Classifies right angles", () => {
   const right = getAngleType(90);
   assert.equal(right, "Right angle");
 });
+
+test("classifies acute angles", () => {
+  assert.equal(getAngleType(1), "Acute angle");
+  assert.equal(getAngleType(45), "Acute angle");
+  assert.equal(getAngleType(89), "Acute angle");
+  assert.equal(getAngleType(36), "Acute angle");
+  assert.equal(getAngleType(20), "Acute angle");
+
+});
+
+test("classifies obtuse angles", () => {
+  assert.equal(getAngleType(91), "Obtuse angle");
+  assert.equal(getAngleType(105), "Obtuse angle");
+  assert.equal(getAngleType(179), "Obtuse angle");
+  assert.equal(getAngleType(125), "Obtuse angle");
+  assert.equal(getAngleType(110), "Obtuse angle");
+});
+
+test("classifies straight angles", () => {
+  const straight = getAngleType(180);
+  assert.equal(straight, "Straight angle");
+});
+
+test("classifies reflex angles", () => {
+  assert.equal(getAngleType(181), "Reflex angle");
+  assert.equal(getAngleType(220), "Reflex angle");
+  assert.equal(getAngleType(289), "Reflex angle");
+  assert.equal(getAngleType(300), "Reflex angle");
+  assert.equal(getAngleType(349), "Reflex angle");
+});
+
+test("classifies invalid angles", () => {
+  assert.equal(getAngleType(-5), "Invalid angle");
+  assert.equal(getAngleType(0), "Invalid angle");
+  assert.equal(getAngleType(360), "Invalid angle");
+  assert.equal(getAngleType(400), "Invalid angle");
+  assert.equal(getAngleType(420), "Invalid angle");
+});

implement-and-rewrite-tests/implement-tests-with-node-test/2-is-proper-fraction.test.js

@@ -6,7 +6,63 @@ import { isProperFraction } from "../implement/2-is-proper-fraction.js";
 // TODO: Write tests to cover all cases.
 // What combinations of numerators and denominators should you test?
 
-test("Basic proper fraction", () => {
+test("Returns true for a basic proper fraction", () => {
   // Example: 1/2 is a proper fraction
   assert.equal(isProperFraction(1, 2), true);
 });
+
+test("Returns true when the numerator is zero and denominator is positive", () => {
+  assert.equal(isProperFraction(0, 1), true);
+});
+
+test("Returns true when both numerator and denominator is negative", () => {
+  assert.equal(isProperFraction(-1, -2), true);
+});
+
+test("Returns true when the numerator is positive denominator is negative", () => {
+  assert.equal(isProperFraction(1, -2), true);
+});
+
+test("Returns true when the numerator is negative and the denominator is positive", () => {
+  assert.equal(isProperFraction(-1, 2), true);
+});
+
+test("Returns false when numerator is negative and denominator is zero", () => {
+  assert.equal(isProperFraction(-1, 0), false);
+});
+
+test("Returns false for 15/14", () => {
+  assert.equal(isProperFraction(15, 14), false);
+});
+
+test("Returns false when numerator equals denominator", () => {
+  assert.equal(isProperFraction(4, 4), false);
+});
+
+test("Returns false when numerator is positive and denominator is zero", () => {
+  assert.equal(isProperFraction(1, 0), false);
+});
+
+test("Returns false when both numerator and denominator are zero", () => {
+  assert.equal(isProperFraction(0, 0), false);
+});
+
+test("Returns true when numerator is zero and denominator is negative", () => {
+  assert.equal(isProperFraction(0, -2), true);
+});
+
+test("Returns false when positive numerator has greater magnitude than negative denominator", () => {
+  assert.equal(isProperFraction(3, -2), false);
+});
+
+test("Returns false when negative numerator has greater magnitude than positive denominator", () => {
+  assert.equal(isProperFraction(-3, 2), false);
+});
+
+test("Returns false when both numbers are negative and numerator has greater magnitude", () => {
+  assert.equal(isProperFraction(-3, -2), false);
+});
+
+test("Returns false when numerator and denominator are equal negative numbers", () => {
+  assert.equal(isProperFraction(-4, -4), false);
+});

implement-and-rewrite-tests/implement-tests-with-node-test/3-get-card-value.test.js

@@ -9,8 +9,53 @@ test("Valid single-digit card", () => {
   assert.equal(getCardValue("9♠"), 9);
 });
 
+test("Ace has a value of 11", () => {
+  assert.equal(getCardValue("A♠"), 11);
+});
+
+test("Two has a value of 2", () => {
+  assert.equal(getCardValue("2♥"), 2);
+});
+
+test("Ten has a value of 10", () => {
+  assert.equal(getCardValue("10♥"), 10);
+});
+
+test("Jack has a value of 10", () => {
+  assert.equal(getCardValue("J♣"), 10);
+});
+
+test("Queen has a value of 10", () => {
+  assert.equal(getCardValue("Q♦"), 10);
+});
+
+test("King has a value of 10", () => {
+  assert.equal(getCardValue("K♦"), 10);
+});
+
 test("Arbitrary non-card string", () => {
   assert.throws(() => getCardValue("invalid"), /Expected a number followed by a suit, but got "invalid"/, "Expected clear error");
 });
 
-// TODO: What other invalid card cases can you think of?
+test("Invalid rank throws an error", () => {
+  assert.throws(() => getCardValue("Z♠"), /Expected a number followed by a suit, but got "Z♠"/, "Expected clear error");
+});
+
+test("Invalid suit throws an error", () => {
+  assert.throws(() => getCardValue("9X"), /Expected a number followed by a suit, but got "9X"/, "Expected clear error");
+});
+
+test("Card without a suit throws an error", () => {
+  assert.throws(() => getCardValue("9"), /Expected a number followed by a suit, but got "9"/, "Expected clear error");
+});
+
+test("Card without a rank throws an error", () => {
+  assert.throws(() => getCardValue("♠"), /Expected a number followed by a suit, but got "♠"/, "Expected clear error");
+});
+
+test("Card without a number greater than 10 throws an error", () => {
+  assert.throws(() => getCardValue("15♠"), /Expected a number followed by a suit, but got "15♠"/, "Expected clear error");
+});
+
+
+// TODO: What other invalid card cases can you think of?

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

@@ -17,5 +17,24 @@
 // execute the code to ensure all tests pass.
 
 export function getAngleType(angle) {
-  // TODO: Implement this function
+  if (angle === 90) {
+    return "Right angle";
+  }
+
+  if (angle > 0 && 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";
 }

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

@@ -14,5 +14,5 @@
 // execute the code to ensure all tests pass.
 
 export function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  return Math.abs(numerator) < Math.abs(denominator)
 }

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

@@ -23,6 +23,28 @@
 // After you have implemented the function, write tests to cover all the cases, and
 // execute the code to ensure all tests pass.
 
+
 export function getCardValue(card) {
-  // TODO: Implement this function
-}
+  const rank = card.slice(0, -1);
+  const suit = card.slice(-1);
+  const validSuits = ["♠", "♥", "♦", "♣"];
+  const validRanks = ["A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"];
+
+  if (!validSuits.includes(suit)) {
+    throw new Error (`Expected a number followed by a suit, but got "${card}"`);
+  }  
+
+  if (!validRanks.includes(rank)) {
+    throw new Error(`Expected a number followed by a suit, but got "${card}"`);
+  }    
+
+  if (rank === "A") {
+    return 11;
+  }
+
+  if (rank === "J" || rank === "Q" || rank === "K") {
+    return 10;
+  }
+
+  return Number(rank);
+}

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

@@ -12,7 +12,38 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
 });
 
 // Case 2: Right angle
+test(`should return "Right angle" when (angle === 90)`, () => {
+  // Test the exact right-angle boundary
+  expect(getAngleType(90)).toEqual("Right angle");
+});
+
 // Case 3: Obtuse angles
+test(`should return "Obtuse angle" when (90 < angle < 180)`, () => {
+  // Test various obtuse angles, including boundary cases
+  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)`, () => {
+  // Test the exact straight-angle boundary
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
 // Case 5: Reflex angles
+test(`should return "Reflex angle" when (180 < angle < 360)`, () => {
+  // Test various reflex angles, including boundary cases
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(220)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
+
 // Case 6: Invalid angles
+test(`should return "Invalid angle" when (angles outside of valid range)`, () => {
+  // Test various invalid angles, including boundary cases
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(-5)).toEqual("Invalid angle");
+  expect(getAngleType(400)).toEqual("Invalid angle");
+});

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

@@ -1,8 +1,61 @@
 import { isProperFraction } from "../implement/2-is-proper-fraction.js";
 
-// 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);
 });
+
+test(`should return false when numerator equals the denominator`, () => {
+  expect(isProperFraction(4, 4)).toEqual(false);
+});
+
+test(`should return false if 15/14`, () => {
+  expect(isProperFraction(15, 14)).toEqual(false);
+});
+
+test(`should return false if numerator is negative and denominator is zero`, () => {
+  expect(isProperFraction(-1, 0)).toEqual(false);
+});
+
+test(`should return true if numerator is negative and denominator is positive`, () => {
+  expect(isProperFraction(-1, 2)).toEqual(true);
+});
+
+test(`should return true if numerator is positive and denominator is negative`, () => {
+  expect(isProperFraction(1, -2)).toEqual(true);
+});
+
+test(`should return true if both numerator and denominator is negative`, () => {
+  expect(isProperFraction(-1, -2)).toEqual(true);
+});
+
+test(`should return true if numerator is zero and the denominator is positive`, () => {
+  expect(isProperFraction(0, 1)).toEqual(true);
+});
+
+test(`should return true for a basic proper fraction`, () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+});
+
+test("Returns false when both numerator and denominator are zero", () => {
+  expect(isProperFraction(0, 0)).toEqual(false);
+});
+
+test("Return true when numerator is zero and denominator is negative", () => {
+  expect(isProperFraction(0, -2)).toEqual(true);
+});
+
+test("Returns false when positive numerator has greater magnitude than negative denominator", () => {
+  expect(isProperFraction(3, -2)).toEqual(false);
+});
+
+test("Returns false when both numbers are negative and numerator has greater magnitude", () => {
+  expect(isProperFraction(-3, -2)).toEqual(false);
+});
+
+test("Returns false when negative numerator has greater magnitude than positive denominator", () => {
+  expect(isProperFraction(-3, 2)).toEqual(false);
+});
+
+test("Returns false when numerator and denominator are equal negative numbers", () => {
+  expect(isProperFraction(-4, -4)).toEqual(false);
+});

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

@@ -7,6 +7,56 @@ test(`Should return 11 when given an ace card`, () => {
   expect(getCardValue("A♠")).toEqual(11);
 });
 
+// Case 2: Ranks (Number Cards)
+test("Two has a value of 2", () => {
+  expect(getCardValue("2♥")).toEqual (2);
+});
+
+test("Five has a value of 2", () => {
+  expect(getCardValue("5♦")).toEqual (5);
+});
+
+test("Ten has a value of 10", () => {
+  expect(getCardValue("10♥")).toEqual(10);
+});
+
+
+//Case 3: Face cards (J, Q, K)
+test("Jack has a value of 10", () => {
+  expect(getCardValue("J♣")).toEqual(10);
+});
+
+test("Queen has a value of 10", () => {
+  expect(getCardValue("Q♦")).toEqual(10);
+});
+
+test("King has a value of 10", () => {
+  expect(getCardValue("K♦")).toEqual(10);
+});
+
+
+//Case 4: Invalid cards 
+test("Card without a suit throws an error", () => {
+  expect(() => getCardValue("9")).toThrow();
+});
+
+test("Card without a number throws an error", () => {
+  expect(() => getCardValue("♣")).toThrow();
+});
+
+test("Card with invalid suit throws an error", () => {
+  expect(() => getCardValue("9X")).toThrow();
+});
+
+test("Card with invalid rank throws an error", () => {
+  expect(() => getCardValue("X♣")).toThrow();
+});
+
+test("Card with rank higher than 10 throws an error", () => {
+  expect(() => getCardValue("15♣")).toThrow();
+});
+
+
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
 //   Face Cards (J, Q, K)
@@ -15,4 +65,3 @@ 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
-