Birmingham | ITP-Jan | Ahmad Roman Sanaye | Sprint 3 | Implement functions and rewrite tests

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

@@ -6,7 +6,8 @@
 // - "Obtuse angle" for angles greater than 90° and less than 180°
 // - "Straight angle" for exactly 180°
 // - "Reflex angle" for angles greater than 180° and less than 360°
-// - "Invalid angle" for angles outside the valid range.
+// - "(angle >= 0 || angle <= 90){
+// Invalid angle" for angles outside the valid range.
 
 // Assumption: The parameter is a valid number. (You do not need to handle non-numeric inputs.)
 
@@ -15,7 +16,17 @@
 // 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.
@@ -33,5 +44,19 @@ function assertEquals(actualOutput, targetOutput) {
 
 // TODO: Write tests to cover all cases, including boundary and invalid cases.
 // Example: Identify Right Angles
+const acute = getAngleType(45);
+assertEquals(acute, "Acute angle");
 const right = getAngleType(90);
 assertEquals(right, "Right angle");
+const obtuse = getAngleType(110);
+assertEquals(obtuse, "Obtuse angle");
+const straight = getAngleType(180);
+assertEquals(straight, "Straight angle");
+const reflex = getAngleType(250);
+assertEquals(reflex, "Reflex angle");
+const invalid = getAngleType(380);
+assertEquals(invalid, "Invalid angle");
+const invalid2 = getAngleType(0);
+assertEquals(invalid2, "Invalid angle");
+const invalid3 = getAngleType(-10);
+assertEquals(invalid3, "Invalid angle");

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

@@ -11,11 +11,12 @@
 // execute the code to ensure all tests pass.
 
 function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  if (denominator === 0) {
+    return false;
+  } else if (Math.abs(numerator) < Math.abs(denominator)) {
+    return true;
+  } else return false;
 }
-
-// The line below allows us to load the isProperFraction function into tests in other files.
-// This will be useful in the "rewrite tests with jest" step.
 module.exports = isProperFraction;
 
 // Here's our helper again
@@ -27,7 +28,24 @@ 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
+// numerator < denominator (in absolute value) → proper fraction
 assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(8, 9), true);
+assertEquals(isProperFraction(0, 5), true); // numerator = 0
+
+// numerator > denominator (in absolute value) → improper fraction
+assertEquals(isProperFraction(3, 2), false);
+assertEquals(isProperFraction(-4, 1), false);
+
+// numerator = denominator (in absolute value) → not a proper fraction
+assertEquals(isProperFraction(5, 5), false);
+assertEquals(isProperFraction(-7, -7), false);
+
+// denominator = 0 → invalid fraction
+assertEquals(isProperFraction(1, 0), false);
+assertEquals(isProperFraction(0, 0), false);
+
+// negative numbers still follow the rule: numerator < denominator (in absolute value)
+assertEquals(isProperFraction(2, -4), true);
+assertEquals(isProperFraction(-2, -5), true);

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

@@ -22,9 +22,25 @@
 // execute the code to ensure all tests pass.
 
 function getCardValue(card) {
-  // TODO: Implement this function
-}
+  if (typeof card !== "string") {
+    throw new Error("Invalid card");
+  }
+  let rank = card.slice(0, -1); // Get everything except the last character
+  let suit = card.slice(-1); //  Get the last character
+
+  const validSuits = ["♠", "♥", "♦", "♣"]; // check if suit is valid
+  if (!validSuits.includes(suit)) {
+    throw new Error("Invalid card");
+  }
 
+  if (rank === "A") {
+    return 11;
+  } else if (/^[JQK]$/.test(rank)) {
+    return 10;
+  } else if (rank.match(/^(10|[2-9])$/)) {
+    return Number(rank);
+  } else throw new Error("Invalid card");
+}
 // The line below allows us to load the getCardValue function into tests in other files.
 // This will be useful in the "rewrite tests with jest" step.
 module.exports = getCardValue;
@@ -36,17 +52,48 @@ function assertEquals(actualOutput, targetOutput) {
     `Expected ${actualOutput} to equal ${targetOutput}`
   );
 }
-
 // TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
-// Examples:
 assertEquals(getCardValue("9♠"), 9);
+assertEquals(getCardValue("A♦"), 11);
+assertEquals(getCardValue("J♣"), 10);
+assertEquals(getCardValue("Q♥"), 10);
+assertEquals(getCardValue("K♠"), 10);
+assertEquals(getCardValue("3♦"), 3);
 
-// Handling invalid cards
 try {
-  getCardValue("invalid");
+  getCardValue("J");
 
-  // This line will not be reached if an error is thrown as expected
+  // The below line will not be reached if an error is thrown as expected
   console.error("Error was not thrown for invalid card");
-} catch (e) {}
-
+} catch (e) {
+  console.log('Test passed for "J": caught error ->', e.message);
+}
 // What other invalid card cases can you think of?
+
+try {
+  getCardValue("9X"); // invalid suit
+  console.error('Test failed for "9X": error was not thrown');
+} catch (e) {
+  console.log('Test passed for "9X": caught error ->', e.message);
+}
+
+try {
+  getCardValue("1♠"); // invalid rank
+  console.error('Test failed for "1♠": error was not thrown');
+} catch (e) {
+  console.log('Test passed for "1♠": caught error ->', e.message);
+}
+
+try {
+  getCardValue("0♥"); // invalid rank
+  console.error('Test failed for "0♥": error was not thrown');
+} catch (e) {
+  console.log('Test passed for "0♥": caught error ->', e.message);
+}
+
+try {
+  getCardValue("ABC"); // completely wrong format
+  console.error('Test failed for "ABC": error was not thrown');
+} catch (e) {
+  console.log('Test passed for "ABC": caught error ->', e.message);
+}

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

@@ -14,7 +14,31 @@ 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(150)).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(200)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
 // Case 6: Invalid angles
+test(`should return "Invalid angle" when (angle <= 0 or angle >= 360)`, () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(-40)).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

@@ -4,7 +4,30 @@ 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
-test(`should return false when denominator is zero`, () => {
+test("returns true when |numerator| < |denominator|", () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+});
+
+test("returns true when numerator is zero", () => {
+  expect(isProperFraction(0, 5)).toEqual(true);
+});
+
+test("returns false when |numerator| > |denominator|", () => {
+  expect(isProperFraction(3, 2)).toEqual(false);
+});
+
+test("returns false when |numerator| = |denominator|", () => {
+  expect(isProperFraction(5, 5)).toEqual(false);
+});
+
+test("returns false when denominator is zero", () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+
+test("returns true when denominator is negative but |numerator| < |denominator|", () => {
+  expect(isProperFraction(2, -4)).toEqual(true);
+});
+
+test("returns true when both numbers are negative but |numerator| < |denominator|", () => {
+  expect(isProperFraction(-3, -4)).toEqual(true);
+});

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

@@ -11,9 +11,29 @@ 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 value of rank variable as a number when we are given 2-10", ()=>{
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("9♠")).toEqual(9);
+  expect(getCardValue("10♠")).toEqual(10);
+});
 //   Face Cards (J, Q, K)
+test(`Should return 10 when given J or Q or K`, () => {
+  expect(getCardValue("K♠")).toEqual(10);
+  expect(getCardValue("J♠")).toEqual(10);
+  expect(getCardValue("Q♠")).toEqual(10);
+})
 //   Invalid Cards
-
+test("Should return Invalid card", ()=>{
+  expect(() => getCardValue(0)).toThrow("Invalid card");
+  expect(() => getCardValue("1X")).toThrow("Invalid card");
+  expect(() => getCardValue("0♥")).toThrow("Invalid card");
+});
+// Invalid card format
+test("Should throw error for tricky invalid card formats", () => {
+  expect(() => getCardValue("0x02♠")).toThrow("Invalid card");
+  expect(() => getCardValue("QQ♠")).toThrow("Invalid card");
+  expect(() => getCardValue("2.1♠")).toThrow("Invalid 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