London | May-2026-itp | Vitalii Kmit | Sprint 3 | Implement and rewrite tests

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

@@ -15,7 +15,19 @@
 // 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";
+  }
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -31,7 +43,10 @@ function assertEquals(actualOutput, targetOutput) {
   );
 }
 
-// TODO: Write tests to cover all cases, including boundary and invalid cases.
 // Example: Identify Right Angles
-const right = getAngleType(90);
-assertEquals(right, "Right angle");
+assertEquals(getAngleType(90), "Right angle");
+assertEquals(getAngleType(45), "Acute angle");
+assertEquals(getAngleType(91), "Obtuse angle");
+assertEquals(getAngleType(180), "Straight angle");
+assertEquals(getAngleType(185), "Reflex angle");
+assertEquals(getAngleType(365), "Invalid angle");

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

@@ -11,7 +11,14 @@
 // execute the code to ensure all tests pass.
 
 function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  if (isNaN(numerator) && isNaN(denominator)) {
+    return false;
+  }
+
+  if (numerator < denominator) {
+    return true;
+  }
+  return false;
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -26,8 +33,11 @@ function assertEquals(actualOutput, targetOutput) {
   );
 }
 
-// TODO: Write tests to cover all cases.
 // What combinations of numerators and denominators should you test?
 
 // Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(2, 2), false);
+assertEquals(isProperFraction(3, 2), false);
+assertEquals(isProperFraction(4312, 5000), true);
+assertEquals(isProperFraction("Invalid", "data"), false);

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

@@ -22,7 +22,34 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
+  const lastCharIndex = card.length - 1;
+  const rank = card.slice(0, lastCharIndex);
+  const suit = card.slice(lastCharIndex);
+
+  if (rank === "10") {
+    return 10;
+  }
+
+  if (card.length > 2) {
+    throw new Error("Invalid input length");
+  }
+
+  if (!(suit === "♠" || suit === "♥" || suit === "♦" || suit === "♣")) {
+    throw new Error(
+      "Invalid second character detected, only suits(♠♥♦♣) are allowed, but got this character:",
+      suit
+    );
+  }
+
+  if (rank == "A") {
+    return 11;
+  } else if (rank == "J" || rank == "Q" || rank == "K") {
+    return 10;
+  } else if (!isNaN(rank)) {
+    return Number(rank);
+  } else {
+    throw new Error("Invalid card");
+  }
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.

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

@@ -14,7 +14,36 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
 });
 
 // Case 2: Right angle
+test(`should return "Right angle" when (angle == 90)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(90)).toEqual("Right angle");
+});
+
 // Case 3: Obtuse angles
+test(`should return "Obtuse" when (90 < angle < 180)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(140)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
 // Case 4: Straight angle
+test(`should return "Straight angle" when (angle == 180)`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
 // Case 5: Reflex angles
+test(`should return "Reflex angle" when (180 < angle < 360)`, () => {
+  // Test various acute 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"`, () => {
+  // Test various acute angles, including boundary cases
+  expect(getAngleType(361)).toEqual("Invalid angle");
+  expect(getAngleType("Test data")).toEqual("Invalid angle");
+});

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

@@ -7,4 +7,9 @@ const isProperFraction = require("../implement/2-is-proper-fraction");
 // Special case: numerator is zero
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
+  expect(isProperFraction(2, 2)).toEqual(false);
+  expect(isProperFraction(3, 2)).toEqual(false);
+  expect(isProperFraction(3, 4)).toEqual(true);
+  expect(isProperFraction(4312, 5000)).toEqual(true);
+  expect(isProperFraction("invalid", "data")).toEqual(false);
 });

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

@@ -7,6 +7,30 @@ 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("AA♠")).toThrow(Error);
+});
+
+// Case 2
+test(`Should return 10 when given an jack, queen, king`, () => {
+  expect(getCardValue("J♠")).toEqual(10);
+  expect(getCardValue("Q♥")).toEqual(10);
+  expect(getCardValue("K♠")).toEqual(10);
+  expect(() => getCardValue("K🤣")).toThrow(Error);
+  expect(() => getCardValue("KKW🤣")).toThrow(Error);
+});
+
+// Case 3
+test(`Should return number when given a number`, () => {
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("10♥")).toEqual(10);
+  expect(() => getCardValue("423🤣")).toThrow(Error);
+});
+
+test("Should return error on invalid input", () => {
+  expect(() => getCardValue(null)).toThrow(Error);
+  expect(() => getCardValue(undefined)).toThrow(Error);
+  expect(() => getCardValue(12398)).toThrow(Error);
+  expect(() => getCardValue(NaN)).toThrow(Error);
 });
 
 // Suggestion: Group the remaining test data into these categories:
@@ -17,4 +41,3 @@ 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
-