LONDON_JAN25 | KHALIL ALI | STRUCTURING_AND_TESTING_DATA | SPRINT 3 | WEEK 6

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

@@ -9,6 +9,10 @@
 
 function getAngleType(angle) {
    if (angle === 90) return "Right angle";
+   if(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 +47,18 @@ 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"
 // ====> write your test here, and then add a line to pass the test in the function above
-
+const straight = getAngleType(180);
+assertEquals(straight, "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"
-// ====> write your test here, and then add a line to pass the test in the function above
+// ====> write your test here, and then add a line to pass the test in the function above
+const reflex = getAngleType(270);
+assertEquals(reflex, "Reflex angle");

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

@@ -8,7 +8,10 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
+    if (denominator === 0) return "Error: Denominator cannot be 0";
+    if (Math.abs(numerator)  < denominator) return true;
+    if (Math.abs(numerator) >= denominator) return false;
+
 }
 
 // here's our helper again
@@ -40,14 +43,18 @@ 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(equalFraction, false);
 // ====> complete with your assertion
 
 // Stretch:
 // What other scenarios could you test for?
+const denominatorIsZero = isProperFraction(3, 0);
+assertEquals(denominatorIsZero,"Error: Denominator cannot be 0");

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

@@ -8,7 +8,11 @@
 // 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) {
+  let rank = card.slice(0,-1);
     if (rank === "A") return 11;
+    if (rank === "10" || rank === "j" || rank === "Q" || rank === "K") return 10;
+    if (rank >2 && rank <=9) return Number(rank);
+    else throw new Error ("Invalid card rank");
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -33,19 +37,32 @@ 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 queenofDiamonds = getCardValue("Q♦");
+assertEquals(queenofDiamonds, 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 aceofClubs = getCardValue("A♣");
+assertEquals(aceofClubs, 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."
+
+try {
+  const other = getCardValue("X♠")
+} catch (badCard) {
+  console.log(badCard.message);
+}

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

@@ -1,6 +1,9 @@
 function getAngleType(angle) {
   if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
+  if(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";
 
 }
 

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

@@ -10,15 +10,29 @@ test("should identify right angle (90°)", () => {
 // Case 2: Identify Acute Angles:
 // When the angle is less than 90 degrees,
 // Then the function should return "Acute angle"
+test("should identify acute angle (< 90°)", () => {
+  expect(getAngleType(45)).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"
-
+test("should identify obtuse angle (> 90° but < 180°)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+});
 // Case 4: Identify Straight Angles:
 // When the angle is exactly 180 degrees,
 // Then the function should return "Straight angle"
-
+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"
+test("should identify reflex angle (> 180° but < 360°)", () => {
+  expect(getAngleType(270)).toEqual("Reflex angle");
+  expect(getAngleType(300)).toEqual("Reflex angle");
+  expect(getAngleType(359.999)).toEqual("Reflex angle");
+  expect(getAngleType(180.001)).toEqual("Reflex 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 (Math.abs(numerator)  < Math.abs(denominator)) return true;
+    else return false;
 }
 
 module.exports = isProperFraction;

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

@@ -5,7 +5,14 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
-
+test("should return false if the numerator is greater than or equal to the denominator", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
 // Case 3: Identify Negative Fractions:
-
+test("should return true if the numerator is negative", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);
+});
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false if the numerator and denominator are equal", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});

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

@@ -1,5 +1,10 @@
 function getCardValue(card) {
     // replace with your code from key-implement
-    return 11;
-}
+        let rank = card.slice(0,-1);
+          if (rank === "A") return 11;
+          if (rank === "10" || rank === "j" || rank === "Q" || rank === "K") return 10;
+          if (["2", "3", "4", "5", "6", "7", "8", "9"].includes(rank)) return Number(rank);
+          else throw new Error ("Invalid card rank");
+      }
+
 module.exports = getCardValue;

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

@@ -9,3 +9,19 @@ test("should return 11 for Ace of Spades", () => {
 // Case 3: Handle Face Cards (J, Q, K):
 // Case 4: Handle Ace (A):
 // Case 5: Handle Invalid Cards:
+test("should return 5 for 5♥", () => {
+    expect(getCardValue("5♥")).toEqual(5);
+});
+test("should return 10 for Q♦", () => {
+    expect(getCardValue("Q♦")).toEqual(10);
+});
+test("should return 11 for A♣", () => {
+    expect(getCardValue("A♣")).toEqual(11);
+});
+test('should throw "Invalid card rank" for X♠', () => {
+    expect(() => getCardValue("X♠")).toThrow("Invalid card rank");
+    expect(() => getCardValue("010♠")).toThrow("Invalid card rank");
+    expect(() => getCardValue("02♠")).toThrow("Invalid card rank");
+    expect(() => getCardValue("0x02♠")).toThrow("Invalid card rank");
+    expect(() => getCardValue("2.1♠")).toThrow("Invalid card rank");
+});

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

@@ -1,5 +1,11 @@
 function countChar(stringOfCharacters, findCharacter) {
-    return 5
+    let count = 0;
+    for (let i = 0; i < stringOfCharacters.length; i++) {
+        if (stringOfCharacters[i] === findCharacter) {
+            count++;
+        }
+    }
+    return count;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,9 @@ 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.
+test("should count zero occurrence of a character", () => {
+  const str = "aaaaa";
+  const char = "b";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,18 @@
 function getOrdinalNumber(num) {
- return "1st";
-}
+  const lastDigit = num % 10;
+  const lastTwoDigits = num % 100;
+
+  if (lastDigit === 1 && lastTwoDigits !== 11) {
+    return `${num}st`;
+  }
+  if (lastDigit === 2 && lastTwoDigits !== 12) {
+    return `${num}nd`;
+  }
+  if (lastDigit === 3 && lastTwoDigits !== 13) {
+    return `${num}rd`;
+  }
+  return `${num}th`;
+    }
+    console.log(getOrdinalNumber(111))
 
 module.exports = getOrdinalNumber;

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

@@ -10,4 +10,31 @@ const getOrdinalNumber = require("./get-ordinal-number");
 
 test("should return '1st' for 1", () => {
     expect(getOrdinalNumber(1)).toEqual("1st");
+    expect(getOrdinalNumber(21)).toEqual("21st");
+    expect(getOrdinalNumber(91)).toEqual("91st");
+    expect(getOrdinalNumber(101)).toEqual("101st");
+    expect(getOrdinalNumber(141)).toEqual("141st");
+
+    });
+test("should return '2nd' for 2", () => {
+    expect(getOrdinalNumber(2)).toEqual("2nd");
+    expect(getOrdinalNumber(22)).toEqual("22nd");
+    expect(getOrdinalNumber(92)).toEqual("92nd");
+    expect(getOrdinalNumber(142)).toEqual("142nd");
+    });
+test("should return '3rd' for 3", () => {
+    expect(getOrdinalNumber(3)).toEqual("3rd");
+    expect(getOrdinalNumber(23)).toEqual("23rd");
+    expect(getOrdinalNumber(93)).toEqual("93rd");
+    expect(getOrdinalNumber(143)).toEqual("143rd"); 
+    });
+test("should return '4th' for 4", () => {
+    expect(getOrdinalNumber(4)).toEqual("4th");
+    expect(getOrdinalNumber(24)).toEqual("24th");
+    expect(getOrdinalNumber(94)).toEqual("94th");
+    expect(getOrdinalNumber(144)).toEqual("144th");
     });
+test("should return '11th' for 11", () => {
+    expect(getOrdinalNumber(11)).toEqual("11th");
+    expect(getOrdinalNumber(111)).toEqual("111th");
+    });

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

@@ -1,5 +1,8 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str,count) {
+    if(count < 0 ) throw new Error ("Negative counts are not valid");
+    if(count === 0) return "";
+    if(count === 1) return str;
+    return str.repeat(count);
 }
 
 module.exports = repeat;

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

@@ -20,13 +20,21 @@ test("should repeat the string count times", () => {
 // Given a target string str and a count equal to 1,
 // When the repeat function is called with these inputs,
 // Then it should return the original str without repetition, ensuring that a count of 1 results in no repetition.
+test("should return the string when count is 1",()=>{
+    expect( repeat("hello", 1)).toEqual("hello");
+});
 
 // case: Handle Count of 0:
 // Given a target string str and a count equal to 0,
 // When the repeat function is called with these inputs,
 // Then it should return an empty string, ensuring that a count of 0 results in an empty output.
-
+test("should return empty string when count is 0",()=>{
+    expect( repeat("hello", 0)).toBe("");
+});
 // case: Negative Count:
 // Given a target string str and a negative integer count,
 // When the repeat function is called with these inputs,
 // Then it should throw an error or return an appropriate error message, as negative counts are not valid.
+test("should throw an Error 'Negative counts are not valid' when count is negative",()=>{
+    expect( ()=> repeat("hello",-1)).toThrow('Negative counts are not valid');
+});

Sprint-3/4-stretch-investigate/card-validator.js

@@ -0,0 +1,37 @@
+const isValidNumber = (cardNumber) => {
+    if (cardNumber.length !== 16 || !/^\d+$/.test(cardNumber)) {
+        return false;
+    }
+    let allSame = true;
+    for (let i = 1; i < 16; i++) {
+        if (cardNumber[0] !== cardNumber[i]) {
+            allSame = false;
+            break;
+        }
+    }
+    if (allSame) {
+        return false;
+    }
+    let lastDigit = cardNumber.slice(-1);
+    if (["1", "3", "5", "7", "9"].includes(lastDigit)){
+        return false;
+    }
+    let sum = 0;
+    digitsArray = cardNumber.split('');
+    for (let i = 0; i < 16; i++) {
+        sum += digitsArray[i];
+    }
+    if (sum <= 16) {
+        return false;
+    }
+    return true;
+}
+
+// Here are the rules for a valid number:
+
+// - Number must be 16 digits, all of them must be numbers.
+// - You must have at least two different digits represented (all of the digits cannot be the same).
+// - The final digit must be even.
+// - The sum of all the digits must be greater than 16.
+
+module.exports = isValidNumber;