ITP-2025-1|Elena Vasileia|Week 6|Module-Structuring-and-Testing-Data/Sprint-3/ implement and rewrite & practice TDD

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

@@ -11,8 +11,21 @@ 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 "Acute angle";
+  }
+  if (angle > 90 && angle < 180) {
+    return "Obtuse angle";
+  }
+  if (angle === 180) {
+    return "Straight angle";
+  }
+  if (angle > 180 && angle < 360) {
+    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 +63,17 @@ 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);
-// ====> write your test here, and then add a line to pass the test in the function above
+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"); // ====> write your test here, and then add a line to pass the test in the function above
 
 // 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(250); // ====> write your test here, and then add a line to pass the test in the function above
+assertEquals(reflex, "Reflex angle");
+// ====> write your test here, and then add a line to pass the test in the function above

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

@@ -8,9 +8,10 @@
 // write one test at a time, and make it pass, build your solution up methodically
 
 function isProperFraction(numerator, denominator) {
-  if (numerator < denominator) {
+  if (Math.abs(numerator) < Math.abs(denominator)) {
     return true;
   }
+  return false;
 }
 
 // The line below allows us to load the isProperFraction function into tests in other files.
@@ -46,14 +47,20 @@ 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); // ====> 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);
-// ====> complete with your assertion
+assertEquals(equalFraction, false); // ====> complete with your assertion
 
 // Stretch:
 // What other scenarios could you test for?
+//Negative Denominator check:
+// Input: numerator = 3, denominator = -7
+// target output: true
+// Explanation: The fraction 3/-7 is a proper fraction because the absolute value of the numerator (3) is less than the absolute value of the denominator (7). The function should return true.
+const negativeDenominator = isProperFraction(3, -7);
+assertEquals(negativeDenominator, true); // ====> complete with your assertion

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

@@ -8,9 +8,17 @@
 // 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) {
+  const rank = card.slice(0, -1); // Extract rank by removing the last character (emoji)
   if (rank === "A") {
     return 11;
   }
+  if (rank === "K" || rank === "Q" || rank === "J" || rank === "10") {
+    return 10;
+  }
+  if (rank >= 2 && rank <= 9) {
+    return Number(rank);
+  }
+  return "Invalid card rank.";
 }
 
 // The line below allows us to load the getCardValue function into tests in other files.
@@ -39,19 +47,23 @@ 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); // ====> 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.
+const faceCard = getCardValue("K♦");
+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 ace = getCardValue("A♣");
+assertEquals(ace, 11); //But that is already covered in the first test
 
 // 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("13♠");
+assertEquals(invalidCard, "Invalid card rank.");

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 (<90°)", () => {
+  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 (>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 (>180° and <360°)", () => {
+  expect(getAngleType(270)).toEqual("Reflex angle");
+});

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

@@ -7,7 +7,21 @@ test("should return true for a proper fraction", () => {
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for an improper fraction", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
 
 // Case 3: Identify Negative Fractions:
+test("should return true for a negative proper fraction", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});
+
+// Stretch Case: Negative Denominator check
+test("should return true for a proper fraction with a negative denominator", () => {
+  expect(isProperFraction(3, -7)).toEqual(true);
+});

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

@@ -8,6 +8,25 @@ test("should return 11 for Ace of Spades", () => {
 });
 
 // Case 2: Handle Number Cards (2-10):
+test("should return 5 for 5 of Hearts", () => {
+  const fiveofHearts = getCardValue("5♥");
+  expect(fiveofHearts).toEqual(5);
+});
+
 // Case 3: Handle Face Cards (J, Q, K):
+test("should return 10 for King of Diamonds", () => {
+  const faceCard = getCardValue("K♦");
+  expect(faceCard).toEqual(10);
+});
+
 // Case 4: Handle Ace (A):
+test("should return 11 for Ace of Clubs", () => {
+  const ace = getCardValue("A♣");
+  expect(ace).toEqual(11);
+});
+
 // Case 5: Handle Invalid Cards:
+test("should return 'Invalid card rank.' for invalid card '13♠'", () => {
+  const invalidCard = getCardValue("13♠");
+  expect(invalidCard).toEqual("Invalid card rank.");
+});

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

@@ -1,5 +1,5 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  return stringOfCharacters.split(findCharacter).length - 1;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,57 @@ 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 exist in string", () => {
+  const str = "AAAAA";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario: Single Occurrence
+// Given the input string str,
+// And a character char that occurs exactly once within str,
+// When the function is called with these inputs,
+// Then it should return 1, indicating a single occurrence of char in str.
+test("should return 1 when character occurs once in string", () => {
+  const str = "Hello";
+  const char = "H";
+  const count = countChar(str, char);
+  expect(count).toEqual(1);
+});
+
+// Scenario: Empty String
+// Given an empty input string str,
+// And any character char,
+// When the function is called with these inputs,
+// Then it should return 0, indicating that no occurrences of char were found in the empty str.
+test("should return 0 when input string is empty", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Scenario: Special Characters
+// Given the input string str containing special characters,
+// And a special character char to search for,
+// When the function is called with these inputs,
+// Then it should correctly count the occurrences of the special character char in str.
+test("should count occurrences of special characters", () => {
+  const str = "!@#$$%^&*()_+!";
+  const char = "!";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});
+
+// Scenario: Case Sensitivity
+// Given the input string str containing both uppercase and lowercase letters,
+// And a character char to search for,
+// When the function is called with these inputs,
+// Then it should treat char as case-sensitive and only count occurrences that match the exact case in str.
+test("should treat character search as case-sensitive", () => {
+  const str = "aAaAaA";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(3);
+});

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

@@ -1,5 +1,20 @@
-function getOrdinalNumber(num) {
-  return "1st";
+function getOrdinalNumber(n) {
+  const rem100 = n % 100;
+  if (rem100 >= 11 && rem100 <= 13) {
+    return n + "th";
+  }
+
+  const rem10 = n % 10;
+  if (rem10 === 1) {
+    return n + "st";
+  }
+  if (rem10 === 2) {
+    return n + "nd";
+  }
+  if (rem10 === 3) {
+    return n + "rd";
+  }
+  return n + "th";
 }
 
 module.exports = getOrdinalNumber;

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

@@ -11,3 +11,38 @@ const getOrdinalNumber = require("./get-ordinal-number");
 test("should return '1st' for 1", () => {
   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 for 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 for 4
+// When the number is 4,
+// Then the function should return "4th"
+test("should return '4th' for 4", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+});
+
+// Case 5: Identify the ordinal number for 11
+// When the number is 11,
+// Then the function should return "11th"
+test("should return '11th' for 11", () => {
+  expect(getOrdinalNumber(11)).toEqual("11th");
+});
+
+// Case 6: Identify the ordinal number for 22
+// When the number is 22,
+// Then the function should return "22nd"
+test("should return '22nd' for 22", () => {
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+});

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

@@ -1,5 +1,8 @@
-function repeat() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    return "Count must be a non-negative integer";
+  }
+  return str.repeat(count);
 }
 
-module.exports = repeat;
+module.exports = repeatStr;

Sprint-3/2-practice-tdd/repeat.test.js

@@ -1,5 +1,5 @@
 // Implement a function repeat
-const repeat = require("./repeat");
+const repeatStr = require("./repeat");
 // Given a target string str and a positive integer count,
 // When the repeat function is called with these inputs,
 // Then it should:
@@ -12,21 +12,39 @@ const repeat = require("./repeat");
 test("should repeat the string count times", () => {
   const str = "hello";
   const count = 3;
-  const repeatedStr = repeat(str, count);
+  const repeatedStr = repeatStr(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 return the original string when count is 1", () => {
+  const str = "world";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("world");
+});
 
 // 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 an empty string when count is 0", () => {
+  const str = "test";
+  const count = 0;
+  const repeatedStr = repeatStr(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 return an error message for negative count", () => {
+  const str = "error";
+  const count = -2;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("Count must be a non-negative integer");
+});