Sprint-3 coursework

Author: mohsenzamanist

Sprint-3/1-implement-and-rewrite-tests/implement/1-get-angle-type.js

@@ -8,11 +8,13 @@
 // Then, write the next test! :) Go through this process until all the cases are implemented
 
 function getAngleType(angle) {
-  if (angle === 90) {
-    return "Right angle";
-  }
-   // Run the tests, work out what Case 2 is testing, and implement the required code here.
-   // Then keep going for the other cases, one at a time.
+  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 return "Reflex angle";
+  // Run the tests, work out what Case 2 is testing, and implement the required code here.
+  // Then keep going for the other cases, one at a time.
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -50,14 +52,16 @@ 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 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
+const reflex = getAngleType(260);
+assertEquals(reflex, "Reflex angle");

Sprint-3/1-implement-and-rewrite-tests/implement/2-is-proper-fraction.js

@@ -8,9 +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;
-  }
+  numerator = Math.abs(numerator);
+  denominator = Math.abs(denominator);
+  if (numerator < denominator) return true;
+  else if (numerator > denominator) return false;
+  else if (numerator === denominator) return false;
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -46,14 +48,24 @@ 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?
+// Input: numerator = 4, denominator = -7
+// 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 negativeFraction1 = isProperFraction(4, -7);
+assertEquals(negativeFraction1, true);
+
+// Input: numerator = -4, denominator = -7
+// 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 negativeFraction2 = isProperFraction(4, 7);
+assertEquals(negativeFraction2, true);

Sprint-3/1-implement-and-rewrite-tests/implement/3-get-card-value.js

@@ -8,9 +8,14 @@
 // 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 (!["♠", "♣", "♦", "♥"].includes(card.slice(-1)))
+    throw new Error("Invalid card rank.");
+  const rank = card.slice(0, card.length - 1);
+  if (rank === "A") return 11;
+  if (["10", "J", "Q", "K"].includes(rank)) return 10;
+  if (["2", "3", "4", "5", "6", "7", "8", "9"].includes(rank))
+    return Number(rank);
+  throw new Error("Invalid card rank.");
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -39,19 +44,24 @@ 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♥");
-// ====> 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 faceCard = getCardValue("J♣");
+assertEquals(faceCard, 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 aceCard = getCardValue("A♦");
+assertEquals(aceCard, 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 invalidCard = getCardValue("JK");

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/1-get-angle-type.test.js

@@ -12,15 +12,27 @@ 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 (less than 90°)", () => {
+  expect(getAngleType(80)).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 (greater than 90° & less than 180°)", () => {
+  expect(getAngleType(130)).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 (greater than 180°)", () => {
+  expect(getAngleType(280)).toEqual("Reflex angle");
+});

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/2-is-proper-fraction.test.js

@@ -7,7 +7,19 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for improper fraction", () => {
+  expect(isProperFraction(3, 2)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for proper negative fraction", () => {
+  expect(isProperFraction(-3, 6)).toEqual(true);
+});
+test("should return false for improper negative fraction", () => {
+  expect(isProperFraction(-5, 2)).toEqual(false);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false for improper fraction (numerator === denominator)", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});

Sprint-3/1-implement-and-rewrite-tests/rewrite-tests-with-jest/3-get-card-value.test.js

@@ -8,6 +8,30 @@ test("should return 11 for Ace of Spades", () => {
 });
 
 // Case 2: Handle Number Cards (2-10):
+test("should return the appropriate number from 2 to 10", () => {
+  expect(getCardValue("2♠")).toEqual(2);
+  expect(getCardValue("3♠")).toEqual(3);
+  expect(getCardValue("4♠")).toEqual(4);
+  expect(getCardValue("5♠")).toEqual(5);
+  expect(getCardValue("6♠")).toEqual(6);
+  expect(getCardValue("7♠")).toEqual(7);
+  expect(getCardValue("8♠")).toEqual(8);
+  expect(getCardValue("9♠")).toEqual(9);
+  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 (A)", () => {
+  expect(getCardValue("A♣")).toEqual(11);
+  expect(getCardValue("A♦")).toEqual(11);
+  expect(getCardValue("A♥")).toEqual(11);
+});
 // Case 5: Handle Invalid Cards:
+test("Should return 'Invalid card rank.' for invalid cards", () => {
+  expect(() => getCardValue("KJ")).toThrow("Invalid card rank.");
+});

Sprint-3/2-practice-tdd/count.js

@@ -1,5 +1,7 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  return stringOfCharacters
+    .split("")
+    .reduce((acc, curr) => acc + (curr === findCharacter ? 1 : 0), 0);
 }
 
 module.exports = countChar;

Sprint-3/2-practice-tdd/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, since there are no occurrences of a character", () => {
+  const char = "a";
+  const str = "AABBFFSAA";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

Sprint-3/2-practice-tdd/get-ordinal-number.js

@@ -1,5 +1,22 @@
 function getOrdinalNumber(num) {
-  return "1st";
+  if ([11, 12, 13].includes(num)) return `${num}th`;
+  const lastDigit = String(num).slice(-1);
+  const restOfNum = String(num).slice(0, -1);
+  let ordinalResult = "";
+  switch (lastDigit) {
+    case "1":
+      ordinalResult = restOfNum + "1st";
+      break;
+    case "2":
+      ordinalResult = restOfNum + "2nd";
+      break;
+    case "3":
+      ordinalResult = restOfNum + "3rd";
+      break;
+    default:
+      ordinalResult = restOfNum + lastDigit + "th";
+  }
+  return ordinalResult;
 }
 
 module.exports = getOrdinalNumber;

Sprint-3/2-practice-tdd/get-ordinal-number.test.js

@@ -11,3 +11,29 @@ const getOrdinalNumber = require("./get-ordinal-number");
 test("should return '1st' for 1", () => {
   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 '4th' for 4", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+});
+test("should return '5th' for 5", () => {
+  expect(getOrdinalNumber(5)).toEqual("5th");
+});
+test("should return '11th' for 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+test("should return '21st' for 21", () => {
+  expect(getOrdinalNumber(21)).toEqual("21st");
+});
+test("should return '32nd' for 32", () => {
+  expect(getOrdinalNumber(32)).toEqual("32nd");
+});
+test("should return '53rd' for 53", () => {
+  expect(getOrdinalNumber(53)).toEqual("53rd");
+});