WM | 25-ITP-May | Nahom Mesfin | Sprint 3 coursework

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 +47,19 @@ 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"
 // ====> 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 +8,7 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
+    return Math.abs(numerator) < Math.abs(denominator);
 }
 
 // here's our helper again
@@ -40,13 +40,15 @@ 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(equalFraction, false);
 // ====> complete with your assertion
 
 // Stretch:

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) {
+  const rank = card.slice(0, -1); // all characters except last
     if (rank === "A") return 11;
+    if (/^[2-9]$/.test(rank)) return Number(rank);
+    if (rank === "10" || rank === "J" || rank === "Q" || rank === "K") return 10;
+    throw new Error("Invalid card rank.");
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -33,12 +37,15 @@ 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 kingOfClubs = getCardValue("K♣");
+assertEquals(kingOfClubs, 10);
 
 // Handle Ace (A):
 // Given a card with a rank of "A",
@@ -49,3 +56,9 @@ const fiveofHearts = getCardValue("5♥");
 // 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 {
+  getCardValue("222♥");
+  console.error("Test failed: Expected error for invalid card rank");
+} catch (errorbox) {
+  assertEquals(errorbox.message, "Invalid card rank.");
+}

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

@@ -1,5 +1,9 @@
 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";
   // replace with your completed function from key-implement
 
 }

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

@@ -4,21 +4,18 @@ test("should identify right angle (90°)", () => {
   expect(getAngleType(90)).toEqual("Right angle");
 });
 
-// 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"
+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° and < 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° and < 360°)", () => {
+  expect(getAngleType(270)).toEqual("Reflex angle");
+});

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

@@ -1,5 +1,6 @@
 function isProperFraction(numerator, denominator) {
     if (numerator < denominator) return true;
+    if (numerator >= denominator) return false;
     // add your completed function from key-implement here
 }
 

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

@@ -5,7 +5,17 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for an improper fraction", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for a negative proper fraction", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});

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

@@ -1,5 +1,9 @@
 function getCardValue(card) {
     // replace with your code from key-implement
-    return 11;
+  const rank = card.slice(0, -1); // all characters except last
+    if (rank === "A") return 11;
+    if (rank >= '2' && rank <= '9') return Number(rank);
+    if (rank === "10" || rank === "J" || rank === "Q" || rank === "K") return 10;
+    throw new Error("Invalid card rank.");
 }
 module.exports = getCardValue;

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

@@ -6,6 +6,15 @@ test("should return 11 for Ace of Spades", () => {
     });
 
 // Case 2: Handle Number Cards (2-10):
+test("should return 7 for Seven of Hearts", () => {
+  expect(getCardValue("7♥")).toEqual(7);
+});
 // Case 3: Handle Face Cards (J, Q, K):
+test("should return 10 for Queen of Diamonds", () => {
+  expect(getCardValue("Q♦")).toEqual(10);
+});
 // Case 4: Handle Ace (A):
-// Case 5: Handle Invalid Cards:
+// Case 5: Handle Invalid Cards:(already covered in the first test)
+test("should throw error for invalid card rank", () => {
+  expect(() => getCardValue("Z♣")).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 return 0 when character does not exist", () => {
+  const str = "banana";
+  const char = "z";
+  expect(countChar(str, char)).toEqual(0);
+});

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

@@ -1,5 +1,14 @@
 function getOrdinalNumber(num) {
- return "1st";
+ const lastDigit = num % 10;
+ const lastTwoDigits = num % 100;
+
+ if (lastTwoDigits >= 11 && lastTwoDigits <= 13)
+  return num + "th";
+
+ if (lastDigit === 1) return num + "st";
+ if (lastDigit === 2) return num + "nd";
+ if (lastDigit === 3) return num + "rd";
+  return num + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -11,3 +11,22 @@ const getOrdinalNumber = require("./get-ordinal-number");
 test("should return '1st' for 1", () => {
     expect(getOrdinalNumber(1)).toEqual("1st");
     });
+
+// Case 2: Identify the ordinal number for 2
+// When the number is 2,
+// Then the function should return "2nd"
+test("should return '2nd' for 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+});
+// Case 3: Identify the ordinal number for 3
+// When the number is 3,
+// Then the function should return "3rd"
+test("should return '3rd' for 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+// Case 4: Identify the ordinal number for numbers greater than 3
+// When the number is greater than 3 (e.g., 4, 5, 10),
+// Then the function should return the number followed by "th" (e.g., "4th", "5th", "10th")
+test("should return '4th' for 4", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+});

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("Count must be a non-negative integer.");
+  }
+  return str.repeat(count);
 }
 
 module.exports = repeat;

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

@@ -12,21 +12,37 @@ const repeat = require("./repeat");
 test("should repeat the string count times", () => {
     const str = "hello";
     const count = 3;
-    const repeatedStr = repeat(str, count);
-    expect(repeatedStr).toEqual("hellohellohello");
+    expect(repeat(str, count)).toEqual("hellohellohello");
     });
 
 // case: handle Count of 1:
 // 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 original string if count is 1", () => {
+  const str = "hello";
+  const count = 1;
+  expect(repeat(str, count)).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 an empty string if count is 0", () => {
+  const str = "hello";
+  const count = 0;
+  expect(repeat(str, count)).toEqual("");
+});
+
 // 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 if count is negative", () => {
+  const str = "hello";
+  const count = -1;
+  expect(() => repeat(str, count)).toThrow("Count must be a non-negative integer.");
+});