London | 26-ITP-January | Khaliun Baatarkhuu | Sprint 3 | Implement and rewrite tests.

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

@@ -15,7 +15,22 @@
 // execute the code to ensure all tests pass.
 
 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.
@@ -35,3 +50,24 @@ function assertEquals(actualOutput, targetOutput) {
 // Example: Identify Right Angles
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+
+const acute = getAngleType(45);
+assertEquals(acute, "Acute angle");
+
+const obtuse = getAngleType(120);
+assertEquals(obtuse, "Obtuse angle");
+
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
+
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");
+
+const invalidZero = getAngleType(0);
+assertEquals(invalidZero, "Invalid angle");
+
+const invalidNegative = getAngleType(-45);
+assertEquals(invalidNegative, "Invalid angle");
+
+const invalidOver = getAngleType(361);
+assertEquals(invalidOver, "Invalid angle");

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

@@ -12,6 +12,11 @@
 
 function isProperFraction(numerator, denominator) {
   // TODO: Implement this function
+ if (denominator === 0) {
+    return false;
+  }
+
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -31,3 +36,23 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+
+// Equal numbers → will not be proper
+assertEquals(isProperFraction(2, 2), false);
+
+// Improper fractions
+assertEquals(isProperFraction(5, 4), false);
+assertEquals(isProperFraction(10, 3), false);
+
+// Zero numerator → will be proper
+assertEquals(isProperFraction(0, 5), true);
+
+// Negative numbers
+assertEquals(isProperFraction(-1, 2), true);
+assertEquals(isProperFraction(1, -2), true);
+assertEquals(isProperFraction(-3, -2), false);
+
+// Denominator zero
+assertEquals(isProperFraction(1, 0), false);
+assertEquals(isProperFraction(0, 0), false);
+

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

@@ -23,6 +23,22 @@
 
 function getCardValue(card) {
   // TODO: Implement this function
+ const rank = card.slice(0, -1);
+ const suit = card.slice(-1);
+
+ const validSuits = ["♠", "♥", "♦", "♣"];
+ const faceCards = ["10", "J", "Q", "K"];
+ const numberCards = ["2", "3", "4", "5", "6", "7", "8", "9"];
+
+  if (!validSuits.includes(suit)) {
+    throw new Error("Invalid card suit");
+  }
+
+  if (rank === "A") return 11;
+  if (faceCards.includes(rank)) return 10;
+  if (numberCards.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.
@@ -40,13 +56,30 @@ function assertEquals(actualOutput, targetOutput) {
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
 // Examples:
 assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("5♥"), 5);
+assertEquals(getCardValue("K♦"), 10);
+assertEquals(getCardValue("A♣"), 11);
 
 // Handling invalid cards
 try {
   getCardValue("invalid");
+  console.error("Error was not thrown for completely invalid card");
+} catch (error) {}
+try {
+  getCardValue("1♠");
+  console.error("Error was not thrown for invalid card rank");
+} catch (error) {
+  assertEquals(error.message, "Invalid card rank");
+}
 
   // This line will not be reached if an error is thrown as expected
   console.error("Error was not thrown for invalid card");
 } catch (e) {}
 
 // What other invalid card cases can you think of?
+try {
+  getCardValue("5X");
+  console.error("Error was not thrown for invalid card suit");
+} catch (error) {
+  assertEquals(error.message, "Invalid card suit");
+}

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

@@ -14,7 +14,30 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
 });
 
 // Case 2: Right angle
+test(`should return "Right angle" when angle is 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(135)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
 // Case 4: Straight angle
+test(`should return "Straight angle" when angle is 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" when angle is <= 0 or >= 360`, () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(-10)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(400)).toEqual("Invalid angle");
+});

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

@@ -8,3 +8,37 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+
+// Proper fractions (positive numbers
+test(`should return true when numerator is smaller than denominator`, () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+  expect(isProperFraction(3, 4)).toEqual(true);
+});
+
+// Equal numbers → not proper
+test(`should return false when numerator equals denominator`, () => {
+  expect(isProperFraction(2, 2)).toEqual(false);
+});
+
+// Improper fractions
+test(`should return false when numerator is greater than denominator`, () => {
+  expect(isProperFraction(5, 4)).toEqual(false);
+  expect(isProperFraction(10, 3)).toEqual(false);
+});
+
+// Zero numerator
+test(`should return true when numerator is zero and denominator is non-zero`, () => {
+  expect(isProperFraction(0, 5)).toEqual(true);
+});
+
+// Negative numbers
+test(`should handle negative numbers correctly`, () => {
+  expect(isProperFraction(-1, 2)).toEqual(true);
+  expect(isProperFraction(1, -2)).toEqual(true);
+  expect(isProperFraction(-3, -2)).toEqual(false);
+});
+
+// Both zero
+test(`should return false when both numerator and denominator are zero`, () => {
+  expect(isProperFraction(0, 0)).toEqual(false);
+});

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

@@ -11,8 +11,25 @@ test(`Should return 11 when given an ace card`, () => {
 
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
+test(`Should return the correct number for number cards`, () => {
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("9♥")).toEqual(9);
+  expect(getCardValue("10♦")).toEqual(10);
+});
 //   Face Cards (J, Q, K)
+expect(getCardValue("J♣")).toEqual(10);
+  expect(getCardValue("Q♦")).toEqual(10);
+  expect(getCardValue("K♠")).toEqual(10);
+});
 //   Invalid Cards
+test(`Should throw an error for invalid card strings`, () => {
+  const invalidCards = ["", "A", "11♠", "1♠", "B♠", "10X", "♠A", "invalid"];
+
+  for (const badCard of invalidCards) {
+    expect(() => getCardValue(badCard)).toThrowError();
+  }
+});
+
 
 // To learn how to test whether a function throws an error as expected in Jest,
 // please refer to the Jest documentation: