London|MAY_2025|FATMA_DEGIRMENCI|STRUCTRING_AND_TESTING_DATA| SPRINT 3

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

@@ -8,8 +8,19 @@
 // Then, write the next test! :) Go through this process until all the cases are implemented
 
 function getAngleType(angle) {
-   if (angle === 90) return "Right angle";
-   // read to the end, complete line 36, then pass your test here
+  if (angle === 90) {
+    return "Right angle";
+  } else if (angle < 90) {
+    return "Acute 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";
+  }
+
+  // read to the end, complete line 36, then pass your test here
 }
 
 // we're going to use this helper function to make our assertions easier to read
@@ -43,14 +54,18 @@ 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);
-// ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(obtuse, "Obtuse angle");
 
 // 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 straightAngles = getAngleType(180);
+assertEquals(straightAngles, "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
+
+const reflexAngles = getAngleType(190);
+assertEquals(reflexAngles, "Reflex angle");

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

@@ -8,7 +8,13 @@
 // 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 undefined;
+  } else if (Math.abs(numerator) < Math.abs(denominator)) {
+    return true;
+  } else {
+    return false;
+  }
 }
 
 // here's our helper again
@@ -40,14 +46,23 @@ 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);
-// ====> complete with your assertion
+assertEquals(negativeFraction, true);
 
 // 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);
-// ====> complete with your assertion
+assertEquals(equalFraction, false);
 
 // Stretch:
 // What other scenarios could you test for?
+// We can also check the case where the numerator or the denominator is 0, or when both of them are 0.
+const undefinedFraction = isProperFraction(5, 0);
+assertEquals(undefinedFraction, undefined);
+
+const zeroNumber = isProperFraction(0, 6);
+assertEquals(zeroNumber, true);
+
+const bothAreZero = isProperFraction(0, 0);
+assertEquals(bothAreZero, undefined);

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

@@ -8,7 +8,16 @@
 // 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;
+  const rank = card.slice(0, -1);
+  if (Number(rank) <= 9 && Number(rank) >= 2) {
+    return Number(rank);
+  } else if (rank === "A") {
+    return 11;
+  } else if (rank === "10" || rank === "Q" || rank === "K" || rank === "J") {
+    return 10;
+  } else {
+    throw new Error("Invalid card rank");
+  }
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -33,19 +42,27 @@ 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.
-
-// 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 cardJorQorK = getCardValue("K♥");
+assertEquals(cardJorQorK, 10);
 
 // 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 {
+  getCardValue("23♠");
+  console.log("Test failed:No error was thrown");
+} catch (error) {
+  console.log("Test passed: Error was thrown correctly");
+  console.assert(
+    error.message === "Invalid card rank",
+    `Expected 'Invalid card rank' ${error.message}`
+  );
+}

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

@@ -1,18 +1,15 @@
 function getAngleType(angle) {
-  if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
+  if (angle === 90) {
+    return "Right angle";
+  } else if (angle < 90) {
+    return "Acute 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";
+  }
 }
 
-
-
-
-
-
-
-
-// Don't get bogged down in this detail
-// Jest uses CommonJS module syntax by default as it's quite old
-// We will upgrade our approach to ES6 modules in the next course module, so for now 
-// we have just written the CommonJS module.exports syntax for you
-module.exports = getAngleType;
+module.exports = getAngleType;

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(30)).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(100)).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(300)).toEqual("Reflex angle");
+});

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

@@ -1,6 +1,10 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+  if (denominator === 0) {
+    return undefined;
+  } else if (Math.abs(numerator) < Math.abs(denominator)) {
+    return true;
+  } else {
+    return false;
+  }
 }
-
-module.exports = isProperFraction;
+module.exports = isProperFraction;

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

@@ -4,8 +4,14 @@ test("should return true for a proper fraction", () => {
   expect(isProperFraction(2, 3)).toEqual(true);
 });
 
-// Case 2: Identify Improper Fractions:
+test("should return false for a improper fraction", () => {
+  expect(isProperFraction(5, 3)).toEqual(false);
+});
 
-// Case 3: Identify Negative Fractions:
+test("should return true for negative proper fraction", () => {
+  expect(isProperFraction(-2, 3)).toEqual(true);
+});
 
-// Case 4: Identify Equal Numerator and Denominator:
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(2, 2)).toEqual(false);
+});

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

@@ -1,5 +1,13 @@
 function getCardValue(card) {
-    // replace with your code from key-implement
+  const rank = card.slice(0, -1);
+  if (Number(rank) <= 10 && Number(rank) >= 2) {
+    return Number(rank);
+  } else if (rank === "A") {
     return 11;
+  } else if (rank === "Q" || rank === "K" || rank === "J") {
+    return 10;
+  } else {
+    throw new Error("Invalid card rank");
+  }
 }
-module.exports = getCardValue;
+module.exports = getCardValue;

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

@@ -1,11 +1,17 @@
 const getCardValue = require("./3-get-card-value");
 
+test("should return 4 for 4 of Hearts", () => {
+  expect(getCardValue("4♠")).toEqual(4);
+});
+
+test("should return 10 for Queen of Spades", () => {
+  expect(getCardValue("Q♠")).toEqual(10);
+});
+
 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:
+  expect(getCardValue("A♠")).toEqual(11);
+});
+
+test("should throw error for invalid card", () => {
+  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 = count + 1;
+    }
+  }
+  return count;
 }
 
-module.exports = countChar;
+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 occur", () => {
+  const str = "fatma";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

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

@@ -1,5 +1,15 @@
-function getOrdinalNumber(num) {
- return "1st";
-}
+const getOrdinalNumber = (n) => {
+  if (n > 3 && n < 21) return n + "th";
+  switch (n % 10) {
+    case 1:
+      return n + "st";
+    case 2:
+      return n + "nd";
+    case 3:
+      return n + "rd";
+    default:
+      return n + "th";
+  }
+};
 
-module.exports = getOrdinalNumber;
+module.exports = getOrdinalNumber;

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

@@ -9,5 +9,20 @@ const getOrdinalNumber = require("./get-ordinal-number");
 // Then the function should return "1st"
 
 test("should return '1st' for 1", () => {
-    expect(getOrdinalNumber(1)).toEqual("1st");
-    });
+  expect(getOrdinalNumber(1)).toEqual("1st");
+});
+test("should return '2nd' for 2", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+});
+test("should return '3rd' for 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+test("should return '11th' for 11 ", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+test("should return '12th' for 12 ", () => {
+  expect(getOrdinalNumber(12)).toEqual("12th");
+});
+test("should return '13th' for 13 ", () => {
+  expect(getOrdinalNumber(13)).toEqual("13th");
+});

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

@@ -1,5 +1,11 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    throw new Error("count must be a non-negative integer");
+  } else if (count === 0) {
+    return "";
+  } else if (count > 0) {
+    return str.repeat(count);
+  }
 }
 
-module.exports = repeat;
+module.exports = repeat;