London| 26-ITP-May | Martin Mwaka | Sprint 3 | Implement and rewrite tests

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

@@ -16,6 +16,21 @@
 
 function getAngleType(angle) {
   // TODO: Implement this function
+  let returnAngle;
+  if (angle > 0 && angle < 90) {
+    returnAngle = "Acute";
+  } else if (angle === 90) {
+    returnAngle = "Right";
+  } else if (angle > 90 && angle < 180) {
+    returnAngle = "Obtuse";
+  } else if (angle === 180) {
+    returnAngle = "Straight";
+  } else if (angle > 180 && angle < 360) {
+    returnAngle = "Reflex";
+  } else {
+    returnAngle = "Invalid";
+  }
+  return `${returnAngle} angle`;
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -34,4 +49,17 @@ function assertEquals(actualOutput, targetOutput) {
 // TODO: Write tests to cover all cases, including boundary and invalid cases.
 // Example: Identify Right Angles
 const right = getAngleType(90);
+const acute = getAngleType(75);
+const obtuse = getAngleType(150);
+const straight = getAngleType(180);
+const reflex = getAngleType(340);
+let invalid = getAngleType(0);
+invalid = getAngleType(360);
+invalid = getAngleType(-2);
+
 assertEquals(right, "Right angle");
+assertEquals(acute, "Acute angle");
+assertEquals(obtuse, "Obtuse angle");
+assertEquals(straight, "Straight angle");
+assertEquals(reflex, "Reflex angle");
+assertEquals(invalid, "Invalid angle");

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

@@ -12,6 +12,8 @@
 
 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 +33,9 @@ function assertEquals(actualOutput, targetOutput) {
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(3, 1), false);
+assertEquals(isProperFraction(2, 2), false);
+assertEquals(isProperFraction(5, 0), false);
+assertEquals(isProperFraction(-1, 0), false);
+assertEquals(isProperFraction(-2, 4), true);
+assertEquals(isProperFraction(4, -2), false);

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

@@ -23,6 +23,28 @@
 
 function getCardValue(card) {
   // TODO: Implement this function
+  const cardRanks = "A,2,3,4,5,6,7,8,9,10,J,Q,K".split(",");
+  const cardSuits = "♠,♥,♦,♣".split(",");
+
+  // Throw error if card is empty
+  if (!card) throw new Error(`Invalid card`);
+
+  const cardSuit = card[card.length - 1];
+  // Throw error is card suit is not valid
+  if (!cardSuits.includes(cardSuit)) {
+    throw new Error(`Invalid card suit`);
+  }
+
+  const cardRank = card.slice(0, -1);
+  // Throw error is cardRank is not valid
+  if (!cardRanks.includes(cardRank)) {
+    throw new Error(`Invalid card rank`);
+  }
+
+  // Return the card value based on given rank
+  if (cardRank === "A") return 11;
+  if (["J", "Q", "K"].includes(cardRank)) return 10;
+  return Number(cardRank);
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -40,15 +62,40 @@ function assertEquals(actualOutput, targetOutput) {
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
 // Examples:
 assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("J♥"), 10);
+assertEquals(getCardValue("Q♣"), 10);
+assertEquals(getCardValue("K♠"), 10);
+assertEquals(getCardValue("A♥"), 11);
+assertEquals(getCardValue("10♦"), 10);
 
 // Handling invalid cards
-try {
-  getCardValue("invalid");
+function assertErrors(func, errorMessage) {
+  try {
+    func();
+    console.error("Error was not thrown for invalid card 😢");
+  } catch (error) {
+    console.assert(
+      error.message.includes(errorMessage),
+      `Expected error: ${errorMessage}, got: ${error.message}`
+    );
+    console.log("Error thrown for invalid card 🎉");
+  }
+}
+
+function testInvalidCards() {
+  const invalidCardCases = [
+    ["A", "Invalid card suit"],
+    ["11♠", "Invalid card rank"],
+    ["N♠", "Invalid card rank"],
+    ["7K", "Invalid card suit"],
+    ["", "Invalid card"],
+  ];
 
-  // This line will not be reached if an error is thrown as expected
-  console.error("Error was not thrown for invalid card 😢");
-} catch (e) {
-  console.log("Error thrown for invalid card 🎉");
+  invalidCardCases.forEach(([card, message]) => {
+    console.log("-".repeat(50));
+    console.log(`Card: ${card}, Message: ${message}`);
+    assertErrors(() => getCardValue(card), message);
+  });
 }
 
-// What other invalid card cases can you think of?
+testInvalidCards();

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

@@ -14,7 +14,28 @@ 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(340)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
 // Case 6: Invalid angles
+test(`should return "Invalid" when (angle < 1 || angel > 360)`, () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(-15)).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

@@ -8,3 +8,13 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+
+test(`should return false when (numerator >= denominator)`, () => {
+  expect(isProperFraction(2, 1)).toEqual(false);
+  expect(isProperFraction(2, 2)).toEqual(false);
+});
+
+test(`should treat numerator and denominator as absolute values when determining proper fractions`, () => {
+  expect(isProperFraction(-2, 3)).toEqual(true);
+  expect(isProperFraction(-7, 2)).toEqual(false);
+});

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

@@ -9,6 +9,31 @@ test(`Should return 11 when given an ace card`, () => {
   expect(getCardValue("A♠")).toEqual(11);
 });
 
+test(`Should return 10 when given an a face card of J, Q or K`, () => {
+  expect(getCardValue("J♠")).toEqual(10);
+  expect(getCardValue("Q♠")).toEqual(10);
+  expect(getCardValue("K♠")).toEqual(10);
+});
+
+test(`Should return number when given an a face card (>= 2 && < 10)`, () => {
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("6♠")).toEqual(6);
+  expect(getCardValue("9♠")).toEqual(9);
+});
+
+// Invalid cards
+test(`Should return "Invalid card suit" when suit is invalid`, () => {
+  expect(() => getCardValue("A")).toThrowError();
+});
+
+test(`Should return "Invalid card rank" when rank is invalid`, () => {
+  expect(() => getCardValue("1♠")).toThrowError();
+});
+
+test(`Should return "Invalid card" when rank is an empty card`, () => {
+  expect(() => getCardValue("")).toThrowError();
+});
+
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
 //   Face Cards (J, Q, K)
@@ -17,4 +42,3 @@ 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
-