London | May-2025 | Reza Jahanimir | Sprint-3

Sprint-3/1-key-implement/1-get-angle-type.js

@@ -2,13 +2,17 @@
 // Build up your function case by case, writing tests as you go
 // The first test and case is written for you. The next case has a test, but no code.
 // Execute this script in your terminal
-// node 1-get-angle-type.js
+//node 1-get-angle-type.js
 // The assertion error will tell you what the expected output is
 // Write the code to pass the test
 // Then, write the next test! :) Go through this process until all the cases are implemented
 
 function getAngleType(angle) {
    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";
    // read to the end, complete line 36, then pass your test here
 }
 
@@ -43,14 +47,19 @@ assertEquals(acute, "Acute angle");
 // When the angle is greater than 90 degrees and less than 180 degrees,
 // Then the function should return "Obtuse angle"
 const obtuse = getAngleType(120);
+assertEquals(obtuse,"Obtuse angle");
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
+const Straight  = getAngleType(180);
+assertEquals(Straight,"Straight angle");
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Case 5: Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
 // Then the function should return "Reflex angle"
+const Reflex = getAngleType(200);
+assertEquals(Reflex,"Reflex angle");
 // ====> write your test here, and then add a line to pass the test in the function above

Sprint-3/1-key-implement/2-is-proper-fraction.js

@@ -9,6 +9,8 @@
 
 function isProperFraction(numerator, denominator) {
     if (numerator < denominator) return true;
+    if (numerator >= denominator)return false;
+
 }
 
 // here's our helper again
@@ -40,13 +42,15 @@ assertEquals(improperFraction, false);
 // target output: true
 // Explanation: The fraction -4/7 is a proper fraction because the absolute value of the numerator (4) is less than the denominator (7). The function should return true.
 const negativeFraction = isProperFraction(-4, 7);
+assertEquals(negativeFraction,true);
 // ====> complete with your assertion
 
 // Equal Numerator and Denominator check:
 // Input: numerator = 3, denominator = 3
 // target output: false
 // Explanation: The fraction 3/3 is not a proper fraction because the numerator is equal to the denominator. The function should return false.
 const equalFraction = isProperFraction(3, 3);
+assertEquals(improperFraction,false);
 // ====> complete with your assertion
 
 // Stretch:

Sprint-3/1-key-implement/3-get-card-value.js

@@ -8,8 +8,22 @@
 // write one test at a time, and make it pass, build your solution up methodically
 // just make one change at a time -- don't rush -- programmers are deep and careful thinkers
 function getCardValue(card) {
-    if (rank === "A") return 11;
+       if (!card || typeof card !== "string") return "Invalid card format";  
+  //extracting the rank of the card
+       const rank = card.slice(0, -1).trim();
 }
+//parseInt(rank) and Number(rank) are the same thing. parseInt() is a function that parses a string and returns an integer. If the first character in the string can't be converted into a number, then it returns NaN. Number() is a function that converts a string to a number. If the string can't be converted into a number, then it returns NaN.
+       if (rank === "A") return 11;
+        //For numerical cards, we return the number
+        else if (!isNaN(rank) >= 2 && Number(rank) <= 10) return Number(rank);
+        //For face cards, we return 10
+        else if ( rank === "J" || rank=== "Q" || rank ==="K" ) return 10;
+        //If the card is invalid, we throw an error
+        else return("Invalid card rank.");
+
+
+
+
 
 // You need to write assertions for your function to check it works in different cases
 // we're going to use this helper function to make our assertions easier to read
@@ -33,19 +47,25 @@ assertEquals(aceofSpades, 11);
 // When the function is called with such a card,
 // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
 const fiveofHearts = getCardValue("5♥");
+assertEquals(fiveofHearts,5);
 // ====> write your test here, and then add a line to pass the test in the function above
 
 // Handle Face Cards (J, Q, K):
 // Given a card with a rank of "10," "J," "Q," or "K",
 // When the function is called with such a card,
 // Then it should return the value 10, as these cards are worth 10 points each in blackjack.
-
+const kingofhearts = getCardValue("J","K","Q");
+assertEquals(kingofhearts,10);
 // Handle Ace (A):
 // Given a card with a rank of "A",
 // When the function is called with an Ace,
 // Then it should, by default, assume the Ace is worth 11 points, which is a common rule in blackjack.
+const aceofDiamonds = getCardValue("A:diamonds:");
+assertEquals(aceofDiamonds, 11);
 
 // Handle Invalid Cards:
 // Given a card with an invalid rank (neither a number nor a recognized face card),
 // When the function is called with such a card,
 // Then it should throw an error indicating "Invalid card rank."
+const Invalidcardrank = getCardValue("1:diamonds:");
+assert.strictEqual(Invalidcardrank,"Invalid card rank");

Sprint-3/2-mandatory-rewrite/1-get-angle-type.js

@@ -1,8 +1,17 @@
 function getAngleType(angle) {
+  // handle undefined or out-of-range input
+  if (typeof angle !== "number" || angle <= 0 || angle >= 360) {
+    return "Invalid angle"; 
+  }
   if (angle === 90) return "Right angle";
+  if (angle < 90) return "Acute angle"; 
+  if (angle < 180) return "Obtuse angle";
+  if (angle === 180) return "Straight angle";
+
   // replace with your completed function from key-implement
-
+  return "Reflex angle"; // angle > 180 and < 360
 }
+module.exports = getAngleType;
 
 
 

Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js

@@ -7,18 +7,52 @@ test("should identify right angle (90°)", () => {
 // REPLACE the comments with the tests
 // make your test descriptions as clear and readable as possible
 
-// Case 2: Identify Acute Angles:
 // When the angle is less than 90 degrees,
 // Then the function should return "Acute angle"
+// Case 2: Identify Acute Angles:
+test("should identify acute angles (less than 90°)", () => {
+  expect(getAngleType(45)).toEqual("Acute angle");
+  expect(getAngleType(1)).toEqual("Acute angle");
+  expect(getAngleType(89)).toEqual("Acute angle");
+});
+
 
-// Case 3: Identify Obtuse Angles:
 // When the angle is greater than 90 degrees and less than 180 degrees,
 // Then the function should return "Obtuse angle"
+// Case 3: Identify Obtuse Angles:
+test("should identify obtuse angles (between 90° and 180°)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
 
-// Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
+// Case 4: Identify Straight Angles:
+test("should identify straight angle (180°)", () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
 
-// Case 5: Identify Reflex Angles:
 // When the angle is greater than 180 degrees and less than 360 degrees,
 // Then the function should return "Reflex angle"
+// Case 5: Identify Reflex Angles:
+test("should identify reflex angles (between 180° and 360°)", () => {
+  expect(getAngleType(270)).toEqual("Reflex angle");
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
+
+
+
+
+// Case 6:Invalid inputs
+test("should return 'Invalid angle' for out-of-range or bad input", () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(-10)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(1000)).toEqual("Invalid angle");
+  expect(getAngleType("90")).toEqual("Invalid angle");
+  expect(getAngleType(null)).toEqual("Invalid angle");
+});

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js

@@ -1,6 +1,8 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+    if (denominator === 0) {
+    throw new Error("Denominator cannot be zero.");
+  }
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
 module.exports = isProperFraction;

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js

@@ -1,11 +1,39 @@
 const isProperFraction = require("./2-is-proper-fraction");
 
+
 test("should return true for a proper fraction", () => {
   expect(isProperFraction(2, 3)).toEqual(true);
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for an Improper fraction", () => {
+  expect(isProperFraction(6, 3)).toEqual(false);
+});
+
+test("should return false for a negative improper fraction", () => {
+  expect(isProperFraction(-7, 4)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for a negative proper fraction", () => {
+  expect(isProperFraction(3, -5)).toEqual(true);
+  expect(isProperFraction(-3, 5)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false for equal numerator and denominator", () => {
+  expect(isProperFraction(5, 5)).toEqual(false);
+});
+
+// Case 6: Identify Zero Denominator:
+test("should throw an error for zero denominator", () => {
+  expect(() => isProperFraction(3, 0)).toThrow("Denominator cannot be zero.");
+});
+
+// Case 5: Identify Fractions with Absolute Values:
+test("should return false for equal numerator and denominator regardless of sign", () => {
+  expect(isProperFraction(5, 5)).toEqual(false);
+  expect(isProperFraction(-5, 5)).toEqual(false);
+  expect(isProperFraction(5, -5)).toEqual(false);
+  expect(isProperFraction(-5, -5)).toEqual(false);
+});

Sprint-3/2-mandatory-rewrite/3-get-card-value.js

@@ -1,5 +1,21 @@
 function getCardValue(card) {
-    // replace with your code from key-implement
-    return 11;
+    if (typeof card !== "string" || card.length < 2) {
+    throw new Error("Invalid card input");
+  }
+
+  const trimmedCard = card.trim(); // handles whitespace at start/end
+  const rank = trimmedCard.slice(0, -1).trim(); // Remove suit, trim spaces
+
+  // Handle special cases for Ace and face cards
+  if (rank === "A") return 11;
+  if (["K", "Q", "J", "10"].includes(rank)) return 10;
+
+  // Digits 2–9
+  // return the rank as a number if it's between 2 and 9
+  if ("23456789".includes(rank)) return Number(rank);
+
+  throw new Error("Invalid card rank");
 }
+
+
 module.exports = getCardValue;

Sprint-3/2-mandatory-rewrite/3-get-card-value.test.js

@@ -1,11 +1,38 @@
 const getCardValue = require("./3-get-card-value");
 
-test("should return 11 for Ace of Spades", () => {
-    const aceofSpades = getCardValue("A♠");
-    expect(aceofSpades).toEqual(11);
-    });
-
-// Case 2: Handle Number Cards (2-10):
-// Case 3: Handle Face Cards (J, Q, K):
-// Case 4: Handle Ace (A):
-// Case 5: Handle Invalid Cards:
+// Number cards
+test("should return the correct value for number cards (2-10)", () => {
+  expect(getCardValue("2♦")).toEqual(2);
+  expect(getCardValue("5♣")).toEqual(5);
+  expect(getCardValue("10♥")).toEqual(10);
+});
+
+// Face cards
+test("should return 10 for face cards (J, Q, K)", () => {
+  expect(getCardValue("J♠")).toEqual(10);
+  expect(getCardValue("Q♦")).toEqual(10);
+  expect(getCardValue("K♣")).toEqual(10);
+});
+
+// Ace
+test("should return 11 for Ace", () => {
+  expect(getCardValue("A♠")).toEqual(11);
+  expect(getCardValue("A♣")).toEqual(11);
+  expect(getCardValue("A♦")).toEqual(11);
+});
+
+// Invalid cards
+test("should throw an error for invalid cards", () => {
+  expect(() => getCardValue("1♠")).toThrow("Invalid card rank");
+  expect(() => getCardValue("Z♦")).toThrow("Invalid card rank");
+  expect(() => getCardValue("15♥")).toThrow("Invalid card rank");
+  expect(() => getCardValue("X♣")).toThrow("Invalid card rank");
+});
+
+// edge/weird cases
+test("should throw for strange or malformed input", () => {
+  expect(() => getCardValue("3.1416♠")).toThrow("Invalid card rank"); 
+  expect(() => getCardValue("09♠")).toThrow("Invalid card rank");     
+  expect(() => getCardValue("0x02♠")).toThrow("Invalid card rank");   
+  expect(getCardValue("   5   ♠")).toEqual(5);                
+});

Sprint-3/3-mandatory-practice/implement/count.js

@@ -1,5 +1,9 @@
 function countChar(stringOfCharacters, findCharacter) {
-    return 5
+    if (typeof stringOfCharacters !== "string" || typeof findCharacter !== "string" || findCharacter.length !== 1) {
+    throw new Error("Invalid input: must pass a string and a single character.");
+  }
+    // Convert the string to an array of characters and filter for the target character
+    return [...stringOfCharacters].filter(c => c === findCharacter).length;
 }
 
 module.exports = countChar;

Sprint-3/3-mandatory-practice/implement/count.test.js

@@ -22,3 +22,36 @@ test("should count multiple occurrences of a character", () => {
 // And a character char that does not exist within the case-sensitive str,
 // When the function is called with these inputs,
 // Then it should return 0, indicating that no occurrences of the char were found in the case-sensitive str.
+
+// Scenario 1: Multiple occurrences
+test("should count multiple occurrences of a character", () => {
+  expect(countChar("aaaaa", "a")).toEqual(5);
+});
+
+// Scenario 2: No occurrences
+test("should return 0 when the character is not found", () => {
+  expect(countChar("hello", "z")).toEqual(0);
+});
+
+// Scenario 3: Case sensitivity
+test("should be case-sensitive", () => {
+  expect(countChar("Millena", "m")).toEqual(0); // lowercase 'm' not present
+  expect(countChar("Millena", "M")).toEqual(1); // uppercase 'M' present
+});
+
+// Scenario 4: Count spaces
+test("should count spaces as characters", () => {
+  expect(countChar("Millena Mesfin", " ")).toEqual(1);
+});
+
+// Scenario 5: Empty string
+test("should return 0 for an empty string", () => {
+  expect(countChar("", "m")).toEqual(0);
+});
+
+// Scenario 6: Show it counts 'm' but ignores 'M'
+test("should count only lowercase 'm'", () => {
+  const str = "mMmmMmmM";
+  expect(countChar(str, "m")).toEqual(5); // 4 lowercase
+  expect(countChar(str, "M")).toEqual(3); // 4 uppercase
+});

Sprint-3/3-mandatory-practice/implement/get-ordinal-number.js

@@ -1,5 +1,14 @@
 function getOrdinalNumber(num) {
- return "1st";
-}
+    if (num < 1 || !Number.isInteger(num)) throw new Error("Input must be a positive integer");
+
+    const specialCases = [11, 12, 13];
+    const suffixes = ["th", "st", "nd", "rd"];
+    const lastDigit = num % 10;
+    const lastTwoDigits = num % 100;
+
+    return num + (specialCases.includes(lastTwoDigits) ? "th" : suffixes[lastDigit] || "th");
+  }
+
+
 
 module.exports = getOrdinalNumber;