Capetown | May-2025 | Revive Munashe Mapfumo | Coursework/Sprint-3

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

@@ -8,8 +8,12 @@
 // 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";
+  // read to the end, complete line 36, then pass your test here
+  if (angle < 90) return "Acute angle";
+  if (angle > 90 && angle < 180) return "Obtuse angle";
+  if (angle === 190) 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
@@ -44,13 +48,18 @@ 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(190);
+assertEquals(reflex, "Reflex angle");

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

@@ -8,7 +8,11 @@
 // 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) return true;
+  if (numerator > denominator) return false;
+  if (Math.abs(numerator) < denominator) return true;
+  if (numerator === denominator) return false;
+  if (denominator === 0) return false;
 }
 
 // here's our helper again
@@ -41,13 +45,22 @@ 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?
+// Denominator not equal to 0 check
+// input: numerator = 3, denominator = 0
+// target output: false;
+//Explanation: 3/0 causes is mathematically impossible
+
+const zeroFraction = isProperFraction(3, 0);
+assertEquals(zeroFraction, false);

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

@@ -8,7 +8,9 @@
 // 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;
+  if (rank === "A" || rank === "A♠") return 11;
+  if (rank === "10" || rank === "J" || rank === "K" || rank === "Q") return 10;
+  else return "Invalid card rank";
 }
 
 // You need to write assertions for your function to check it works in different cases
@@ -34,18 +36,24 @@ 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 faceCards = getCardValue("J");
+assertEquals(faceCards, 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 Acards = getCardValue("A");
+assertEquals(Acards, 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."
+const InvalidCards = getCardValue("22");
+assertEquals(InvalidCards, "Invalid card rank");

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

@@ -1,18 +1,14 @@
 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";
 }
 
-
-
-
-
-
-
-
 // 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 +10,31 @@ 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(45)", () => {
+  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", () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(170)).toEqual("Obtuse angle");
+  expect(getAngleType(105)).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", () => {
+  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", () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(359.999)).toEqual("Reflex angle");
+  expect(getAngleType(270)).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) {
+    throw new Error("Denominator cannot be 0");
+  }
+  const absoluteNumerator = Math.abs(numerator);
+  const absoluteDenominator = Math.abs(denominator);
+  return absoluteNumerator < absoluteDenominator;
 }
 
-module.exports = isProperFraction;
+module.exports = isProperFraction;

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

@@ -1,11 +1,21 @@
 const isProperFraction = require("./2-is-proper-fraction");
 
+//testing for proper fractions
 test("should return true for a proper fraction", () => {
   expect(isProperFraction(2, 3)).toEqual(true);
+  expect(isProperFraction(-2, 3)).toEqual(true);
+  expect(isProperFraction(2, -3)).toEqual(true);
 });
 
-// Case 2: Identify Improper Fractions:
-
-// Case 3: Identify Negative Fractions:
+//testing for zero denominator
+test("should throw error for denominator zero", () => {
+  expect(() => isProperFraction(3, 0)).toThrow("Denominator cannot be 0");
+});
 
-// Case 4: Identify Equal Numerator and Denominator:
+// testing for negative fractions
+test("should correctly handle negative fractions", () => {
+  expect(isProperFraction(-2, -3)).toEqual(true);
+  expect(isProperFraction(-3, -2)).toEqual(false);
+  expect(isProperFraction(-3, 2)).toEqual(false);
+  expect(isProperFraction(3, -2)).toEqual(false);
+});

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

@@ -1,5 +1,33 @@
-function getCardValue(card) {
-    // replace with your code from key-implement
-    return 11;
+function getCardValue(rank) {
+  if (typeof rank !== "string" || rank.length < 2) {
+    throw new Error("Invalid card format");
+  }
+
+  const card = rank.slice(0, -1); // removing last character to get card rank
+  // array of valid ranks
+  const validRanks = [
+    "A",
+    "2",
+    "3",
+    "4",
+    "5",
+    "6",
+    "7",
+    "8",
+    "9",
+    "10",
+    "J",
+    "Q",
+    "K",
+  ];
+  // actual values of ranks in respective order
+  const rankValues = [11, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10];
+  const index = validRanks.indexOf(card); // getting a rank
+  if (index !== -1) {
+    // if index rank actually exists return the rankValue
+    return rankValues[index];
+  } 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 +1,26 @@
 const getCardValue = require("./3-get-card-value");
 
-test("should return 11 for Ace of Spades", () => {
-    const aceofSpades = getCardValue("A♠");
-    expect(aceofSpades).toEqual(11);
-    });
+test("should return 11 for Ace of Spade", () => {
+  expect(getCardValue("A♠")).toEqual(11);
+});
 
 // Case 2: Handle Number Cards (2-10):
+test("should handle number cards", () => {
+  expect(getCardValue("3♥")).toEqual(3);
+  expect(getCardValue("5♠")).toEqual(5);
+  expect(getCardValue("10♦")).toEqual(10);
+});
 // 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 cards", () => {
+  expect(getCardValue("A♥")).toEqual(11);
+});
 // Case 5: Handle Invalid Cards:
+test("should throw error for invalid cards", () => {
+  expect(() => getCardValue("22♦")).toThrow("Invalid card rank");
+});

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

@@ -1,5 +1,5 @@
 function countChar(stringOfCharacters, findCharacter) {
-    return 5
+  return stringOfCharacters.split(findCharacter).length - 1;
 }
 
-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 check for no occurrence characters", () => {
+  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 +1,8 @@
 function getOrdinalNumber(num) {
- return "1st";
+  if (num === 1) return "1st";
+  if (num === 2) return "2nd";
+  if (num === 3) return "3rd";
+  if (num === 4) return "4th";
 }
 
-module.exports = getOrdinalNumber;
+module.exports = getOrdinalNumber;

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

@@ -9,5 +9,26 @@ 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");
+});
+
+// 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 of 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 of 4
+// when the number is 4
+// Then the function should return "4th"
+test("should return '4th'for 4", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+});

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

@@ -1,5 +1,7 @@
-function repeat() {
-    return "hellohellohello";
+function repeat(str, count) {
+  if (str === "") return "Input string is empty!";
+  if (count < 0) return "Invalid count value";
+  return str.repeat(count);
 }
 
-module.exports = repeat;
+module.exports = repeat;

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

@@ -10,23 +10,41 @@ const repeat = require("./repeat");
 // Then it should repeat the str count times and return a new string containing the repeated str values.
 
 test("should repeat the string count times", () => {
-    const str = "hello";
-    const count = 3;
-    const repeatedStr = repeat(str, count);
-    expect(repeatedStr).toEqual("hellohellohello");
-    });
+  const str = "hello";
+  const count = 3;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).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 repeat the string 1 time", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).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", () => {
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).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 negative counts not valid", () => {
+  const str = "hello";
+  const count = -1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("Invalid count value");
+});