London | Nadarajah Sripathmanathan | Module-Structuring-and-Testing-Data | Week 3

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

@@ -6,18 +6,25 @@
 // 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";
    // read to the end, complete line 36, then pass your test here
 }
-
+*/
+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";
+}
 // we're going to use this helper function to make our assertions easier to read
 // if the actual output matches the target output, the test will pass
 function assertEquals(actualOutput, targetOutput) {
   console.assert(
     actualOutput === targetOutput,
-    `Expected ${actualOutput} to equal ${targetOutput}`
+    `Expected ${actualOutput} to equal ${targetOutput}` 
   );
 }
 
@@ -44,13 +51,17 @@ assertEquals(acute, "Acute angle");
 // 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 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

@@ -7,8 +7,10 @@
 // complete the rest of the tests and cases
 // 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 (numerator < denominator && denominator !== 0) return true;
+  return false;
 }
 
 // here's our helper again
@@ -41,13 +43,23 @@ assertEquals(improperFraction, false);
 // 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?
+
+// Zero Numerator check:
+
+const zeroNumerator = isProperFraction(0, 5);
+assertEquals(zeroNumerator, true);
+
+// Zero Denominator check:
+const zeroDenominator = isProperFraction(5, 0);
+assertEquals(zeroDenominator, false);

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

@@ -8,7 +8,21 @@
 // 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); // Extract the rank (e.g., "A", "2", "K")
+  if (rank === "A") return 11;
+  if (rank === "2") return 2;
+  if (rank === "3") return 3;
+  if (rank === "4") return 4;
+  if (rank === "5") return 5;
+  if (rank === "6") return 6;
+  if (rank === "7") return 7;
+  if (rank === "8") return 8;
+  if (rank === "9") return 9;
+  if (rank === "10") return 10;
+  if (rank === "J") return 10;
+  if (rank === "Q") return 10;
+  if (rank === "K") return 10;
+  return 0; // Default case (shouldn't happen with valid cards)
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -20,6 +34,7 @@ function assertEquals(actualOutput, targetOutput) {
     `Expected ${actualOutput} to equal ${targetOutput}`
   );
 }
+
 // Acceptance criteria:
 
 // Given a card string in the format "A♠" (representing a card in blackjack - the last character will always be an emoji for a suit, and all characters before will be a number 2-10, or one letter of J, Q, K, A),
@@ -34,18 +49,29 @@ assertEquals(aceofSpades, 11);
 // Then it should return the numeric value corresponding to the rank (e.g., "5" should return 5).
 const fiveofHearts = getCardValue("5♥");
 // ====> write your test here, and then add a line to pass the test in the function above
-
+assertEquals(fiveofHearts, 5);
 // 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 tenofDiamonds = getCardValue("10♦");
+assertEquals(tenofDiamonds, 10);
+const jackofClubs = getCardValue("J♣");
+assertEquals(jackofClubs, 10);
+const queenofSpades = getCardValue("Q♠");
+assertEquals(queenofSpades, 10);
+const kingofHearts = getCardValue("K♥");
+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 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,
+// When the function is called with such
+//  a card,
 // Then it should throw an error indicating "Invalid card rank."
+const invalidCard = getCardValue("X♥");
+assertEquals(invalidCard, 0);

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

@@ -1,18 +1,12 @@
 function getAngleType(angle) {
   if (angle === 90) return "Right angle";
-  // replace with your completed function from key-implement
-
+  if (angle < 90 && angle > 0) 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";
+  if (angle === 0) return "Zero angle";
+  if (angle === 360) return "Full angle";
+  return "Invalid 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;

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

@@ -4,21 +4,27 @@ 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 angles (less than 90°)", () => {
+  expect(getAngleType(30)).toEqual("Acute angle");
+  expect(getAngleType(60)).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"
+test("should identify obtuse angles (greater than 90° and less than 180°)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(150)).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"
+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 angles (greater than 180° and less than 360°)", () => {
+  expect(getAngleType(210)).toEqual("Reflex angle");
+  expect(getAngleType(270)).toEqual("Reflex angle");
+  expect(getAngleType(300)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});

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

@@ -1,6 +1,12 @@
 function isProperFraction(numerator, denominator) {
-    if (numerator < denominator) return true;
-    // add your completed function from key-implement here
+    if (denominator === 0) {
+        return false;
+    }
+    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 +5,21 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for an improper fraction", () => {
+  expect(isProperFraction(4, 3)).toEqual(false);
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should handle negative numerators and denominators", () => {
+  expect(isProperFraction(-1, 2)).toEqual(true);
+  expect(isProperFraction(1, -2)).toEqual(true);
+  expect(isProperFraction(-3, -2)).toEqual(false);
+  expect(isProperFraction(-2, -3)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false for equal numerator and denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+  expect(isProperFraction(1, 1)).toEqual(false);
+});

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

@@ -1,5 +1,22 @@
 function getCardValue(card) {
-    // replace with your code from key-implement
-    return 11;
-}
-module.exports = getCardValue;
+    if (typeof card !== 'string' || card.length < 1) {
+      return 0; // Or throw an error, depending on desired behavior for invalid cards.
+    }
+
+    const value = card[0];
+
+    if (value === 'A') {
+      return 11;
+    } else if (['J', 'Q', 'K'].includes(value)) {
+      return 10;
+    } else if (['2', '3', '4', '5', '6', '7', '8', '9', '10'].includes(value)) {
+      if(value === '1' && card[1] === '0'){
+          return 10;
+      }
+      return parseInt(value);
+    } else {
+      return 0; // Or throw an error, depending on desired behavior for invalid cards.
+    }
+  }
+
+  module.exports = getCardValue;

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

@@ -6,6 +6,28 @@ test("should return 11 for Ace of Spades", () => {
     });
 
 // Case 2: Handle Number Cards (2-10):
+test("should return 2-9 for number cards", () => {
+    expect(getCardValue("2♥")).toEqual(2);
+    expect(getCardValue("5♦")).toEqual(5);
+    expect(getCardValue("9♣")).toEqual(9);
+  });
 // Case 3: Handle Face Cards (J, Q, K):
+test("should return 10 for face cards", () => {
+    expect(getCardValue("J♥")).toEqual(10);
+    expect(getCardValue("Q♦")).toEqual(10);
+    expect(getCardValue("K♣")).toEqual(10);
+  });
 // Case 4: Handle Ace (A):
+test("should return 11 for Ace", () => {
+    expect(getCardValue("A♥")).toEqual(11);
+    expect(getCardValue("A♦")).toEqual(11);
+    expect(getCardValue("A♣")).toEqual(11);
+  });
 // Case 5: Handle Invalid Cards:
+test("should return 0 for invalid cards", () => {
+    expect(getCardValue("X")).toEqual(0);
+    expect(getCardValue("")).toEqual(0);
+    expect(getCardValue(123)).toEqual(0);
+    expect(getCardValue(null)).toEqual(0);
+    expect(getCardValue(undefined)).toEqual(0);
+  });

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

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

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

@@ -22,3 +22,37 @@ 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: No Occurrences
+// Given the input string str,
+// 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 = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should handle empty string", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+test("should handle empty character", () => {
+    const str = "abc";
+    const char = "";
+    const count = countChar(str, char);
+    expect(count).toEqual(0);
+});
+
+test("should handle string with different case", () => {
+    const str = "aBcDa";
+    const char = "a";
+    const count = countChar(str, char);
+    expect(count).toEqual(2);
+});
+