London | ITP-May-25 | Anuar Duisenbek | Module-Structuring-and-Testing-Data | Sprint-3

.gitignore

@@ -1,4 +1,5 @@
 node_modules
 .DS_Store
+.idea/
 .vscode
 **/.DS_Store

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

@@ -8,8 +8,11 @@
 // 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";
+  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";
 }
 
 // we're going to use this helper function to make our assertions easier to read
@@ -43,14 +46,17 @@ 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

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) {
+    throw new Error("Denominator cannot be zero");
+  }
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
 // here's our helper again
@@ -40,14 +43,25 @@ 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 zeroNumerator = isProperFraction(0, 0);
+assertEquals(zeroNumerator, true);
+
+const negativeDenominator = isProperFraction(2, -8);
+assertEquals(negativeDenominator, true);
+
+const negativeImproper = isProperFraction(-5, -2);
+assertEquals(negativeImproper, false);

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

@@ -8,7 +8,12 @@
 // 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;
+  let rank = card.slice(0, -1);
+  if (rank === "A") return 11;
+  if (rank === "K" || rank === "Q" || rank === "J" || rank === "10") return 10;
+  if (Number(rank) >= 2 && Number(rank) <= 9 && rank.length === 1)
+    return Number(rank);
+  throw Error("Invalid card rank");
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -39,13 +44,32 @@ const fiveofHearts = getCardValue("5♥");
 // 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("K♥");
+assertEquals(kingOfHearts, 10);
+
+const jackOfSpades = getCardValue("J♠");
+assertEquals(jackOfSpades, 10);
+
+const queenOfDiamonds = getCardValue("Q♦");
+assertEquals(queenOfDiamonds, 10);
+
+const tenOfDiamonds = getCardValue("10♦");
+assertEquals(tenOfDiamonds, 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 ace = getCardValue("A♣");
+assertEquals(ace, 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 {
+  getCardValue("X♠");
+  console.log("Test failed: should have thrown an error");
+} catch (e) {
+  assertEquals(e.message, "Invalid card rank");
+}

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

@@ -1,18 +1,13 @@
 function getAngleType(angle) {
   if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
+  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";
 }
 
-
-
-
-
-
-
-
 // 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 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

@@ -10,15 +10,30 @@ 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 angles (<90°)", () => {
+  expect(getAngleType(1)).toEqual("Acute angle");
+  expect(getAngleType(15)).toEqual("Acute angle");
+  expect(getAngleType(45)).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"
+test("should identify right angles (between 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 (between 180° and 360°)", () => {
+  expect(getAngleType(280)).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 (denominator === 0) {
+    throw new Error("Denominator cannot be zero");
+  }
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
-module.exports = isProperFraction;
+module.exports = isProperFraction;

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

@@ -5,7 +5,16 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for an improper fraction", () => {
+  expect(isProperFraction(6, 3)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should true for a negative fraction", () => {
+  expect(isProperFraction(-4, -7)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return true for equal numerator and 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;
+  let rank = card.slice(0, -1);
+  if (rank === "A") return 11;
+  if (rank === "K" || rank === "Q" || rank === "J" || rank === "10") return 10;
+  if (Number(rank) >= 2 && Number(rank) <= 9 && rank.length === 1)
+    return Number(rank);
+  throw Error("Invalid card rank");
 }
-module.exports = getCardValue;
+module.exports = getCardValue;

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

@@ -1,11 +1,37 @@
 const getCardValue = require("./3-get-card-value");
 
 test("should return 11 for Ace of Spades", () => {
-    const aceofSpades = getCardValue("A♠");
-    expect(aceofSpades).toEqual(11);
-    });
+  const aceofSpades = getCardValue("A♠");
+  expect(aceofSpades).toEqual(11);
+});
 
 // Case 2: Handle Number Cards (2-10):
+test("should return 7 for Seven of Hearts", () => {
+  expect(getCardValue("7♥")).toEqual(7);
+});
+test("should return 10 for Ten of Diamonds", () => {
+  expect(getCardValue("10♦")).toEqual(10);
+});
+
 // Case 3: Handle Face Cards (J, Q, K):
+test("should return 10 for Jack of Clubs", () => {
+  expect(getCardValue("J♣")).toEqual(10);
+});
+test("should return 10 for Queen of Diamonds", () => {
+  expect(getCardValue("Q♦")).toEqual(10);
+});
+test("should return 10 for King of Hearts", () => {
+  expect(getCardValue("K♥")).toEqual(10);
+});
+
 // Case 4: Handle Ace (A):
+test("should return 11 for Ace of Hearts", () => {
+  expect(getCardValue("A♥")).toEqual(11);
+});
 // Case 5: Handle Invalid Cards:
+test("should throw an error for invalid card rank", () => {
+  expect(() => getCardValue("X♠")).toThrow("Invalid card rank");
+});
+test("should throw an error for empty string", () => {
+  expect(() => getCardValue("")).toThrow("Invalid card rank");
+});

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

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

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

@@ -22,3 +22,18 @@ 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 there are no occurrences", () => {
+  expect(countChar("hello", "z")).toEqual(0);
+});
+
+test("should count multiple 'a' in 'aaa'", () => {
+  expect(countChar("aaa", "a")).toEqual(3);
+});
+
+test("should count 'e' in 'excellent'", () => {
+  expect(countChar("excellent", "e")).toEqual(3);
+});
+
+test("should return 0 when there are no occurrences", () => {
+  expect(countChar("excellent", "E")).toEqual(0);
+});

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

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

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

@@ -9,5 +9,29 @@ 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");
+}); //currently fails
+
+test("should return '3rd' for 3", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+});
+
+test("should return '4th' for 4", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+});
+
+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 +1,8 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str, count) {
+  if (count < 0) {
+    throw new Error("Count must be non-negative");
+  }
+  return str.repeat(count);
 }
 
-module.exports = repeat;
+module.exports = repeat;