Manchester | 26-ITP-Sept | Fatima Rouchi | Sprint 2 | Practice TDD

implement-and-rewrite-tests/implement-tests-with-node-test/1-get-angle-type.test.js

@@ -10,3 +10,30 @@ test("Classifies right angles", () => {
   const right = getAngleType(90);
   assert.equal(right, "Right angle");
 });
+
+test("Classifies acute angles", () => {
+  const acute = getAngleType(45);
+  assert.equal(acute, "Acute angle");
+});
+
+test("classifies obtuse angles", () => {
+  const obtuse = getAngleType(120);
+  assert.equal(obtuse, "Obtuse angle");
+});
+
+test("classifies straight angles", () => {
+  const straight = getAngleType(180);
+  assert.equal(straight, "Straight angle");
+});
+test("classifies reflex angles", () => {
+  const reflex = getAngleType(270);
+  assert.equal(reflex, "Reflex angle");
+});
+test("classifies invalid negative angles", () => {
+  const invalid = getAngleType(-10);
+  assert.equal(invalid, "Invalid angle");
+});
+test("classifies angles greater than 360 as invalid", () => {
+  const invalid = getAngleType(400);
+  assert.equal(invalid, "Invalid angle");
+});

implement-and-rewrite-tests/implement-tests-with-node-test/3-get-card-value.test.js

@@ -9,8 +9,34 @@ test("Valid single-digit card", () => {
   assert.equal(getCardValue("9♠"), 9);
 });
 
-test("Arbitrary non-card string", () => {
-  assert.throws(() => getCardValue("invalid"), /Expected a number followed by a suit, but got "invalid"/, "Expected clear error");
+test("Ace is worth 11", () => {
+  assert.equal(getCardValue("A♠"), 11);
+});
+test("Jack is worth 10", () => {
+  assert.equal(getCardValue("J♠"), 10);
+});
+
+test("Queen is worth 10", () => {
+  assert.equal(getCardValue("Q♠"), 10);
+});
+
+test("King is worth 10", () => {
+  assert.equal(getCardValue("K♠"), 10);
+});
+
+test("Ten is worth 10", () => {
+  assert.equal(getCardValue("10♠"), 10);
+});
+
+test("Missing suit is invalid", () => {
+  assert.throws(() => getCardValue("A"));
 });
 
 // TODO: What other invalid card cases can you think of?
+test("Arbitrary non-card string", () => {
+  assert.throws(
+    () => getCardValue("invalid"),
+    /Expected a number followed by a suit, but got "invalid"/,
+    "Expected clear error"
+  );
+});

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

@@ -17,5 +17,24 @@
 // execute the code to ensure all tests pass.
 
 export function getAngleType(angle) {
-  // TODO: Implement this function
+  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";
+  }
+
+  return "Invalid angle";
 }

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

@@ -14,5 +14,5 @@
 // execute the code to ensure all tests pass.
 
 export function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  return numerator < denominator;
 }

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

@@ -24,5 +24,26 @@
 // execute the code to ensure all tests pass.
 
 export function getCardValue(card) {
-  // TODO: Implement this function
+  const suit = card.slice(-1);
+  const rank = card.slice(0, -1);
+
+  if (!["♠", "♥", "♦", "♣"].includes(suit)) {
+    throw new Error(`Expected a number followed by a suit, but got "${card}"`);
+  }
+
+  if (rank === "A") {
+    return 11;
+  }
+
+  if (rank === "J" || rank === "Q" || rank === "K") {
+    return 10;
+  }
+
+  const value = Number(rank);
+
+  if (!isNaN(value) && value >= 2 && value <= 10) {
+    return value;
+  }
+
+  throw new Error(`Expected a number followed by a suit, but got "${card}"`);
 }

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

@@ -12,7 +12,30 @@ test(`should return "Acute angle" when (0 < angle < 90)`, () => {
 });
 
 // Case 2: Right angle
+test('should return "right angle" when angle is 90', () => {
+  expect(getAngleType(90)).toEqual("Right angle");
+});
 // Case 3: Obtuse angles
+test('should return "Obtuse angle" when (90 < angle < 180)', () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
 // Case 4: Straight angle
+test('should return "Straight angle" when angle is 180', () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
 // Case 5: Reflex angles
+test('should return "Reflex angle" when (180 < angle < 360)', () => {
+  expect(getAngleType(181)).toEqual("Reflex angle");
+  expect(getAngleType(270)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});
 // Case 6: Invalid angles
+
+test('should return "Invalid angle" for invalid angles', () => {
+  expect(getAngleType(-1)).toEqual("Invalid angle");
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(400)).toEqual("Invalid angle");
+});

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

@@ -6,3 +6,30 @@ import { isProperFraction } from "../implement/2-is-proper-fraction.js";
 test(`should return false when denominator is zero`, () => {
   expect(isProperFraction(1, 0)).toEqual(false);
 });
+test("should return true for a proper fraction", () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+});
+
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(5, 5)).toEqual(false);
+});
+
+test("should return false when numerator is greater than denominator", () => {
+  expect(isProperFraction(7, 3)).toEqual(false);
+});
+
+test("should return true when numerator is zero", () => {
+  expect(isProperFraction(0, 5)).toEqual(true);
+});
+
+test("should return false for negative numerator and denominator", () => {
+  expect(isProperFraction(-1, -2)).toEqual(false);
+});
+
+test("should return true for negative numerator and positive denominator", () => {
+  expect(isProperFraction(-1, 2)).toEqual(true);
+});
+
+test("should return false for positive numerator and negative denominator", () => {
+  expect(isProperFraction(1, -2)).toEqual(false);
+});

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

@@ -9,10 +9,34 @@ test(`Should return 11 when given an ace card`, () => {
 
 // Suggestion: Group the remaining test data into these categories:
 //   Number Cards (2-10)
+test("Should return 2 when given a 2 card", () => {
+  expect(getCardValue("2♠")).toEqual(2);
+});
+
+test("Should return 10 when given a 10 card", () => {
+  expect(getCardValue("10♠")).toEqual(10);
+});
 //   Face Cards (J, Q, K)
+test("Should return 10 when given a Jack", () => {
+  expect(getCardValue("J♠")).toEqual(10);
+});
+
+test("Should return 10 when given a Queen", () => {
+  expect(getCardValue("Q♠")).toEqual(10);
+});
+
+test("Should return 10 when given a King", () => {
+  expect(getCardValue("K♠")).toEqual(10);
+});
 //   Invalid Cards
+test("Should throw an error for invalid text", () => {
+  expect(() => getCardValue("invalid")).toThrow();
+});
+
+test("Should throw an error when suit is missing", () => {
+  expect(() => getCardValue("A")).toThrow();
+});
 
 // To learn how to test whether a function throws an error as expected in Jest,
 // please refer to the Jest documentation:
 // https://jestjs.io/docs/expect#tothrowerror
-

practice-tdd/count.js

@@ -1,3 +1,3 @@
 export function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  return stringOfCharacters.split(findCharacter).length - 1;
 }

practice-tdd/count.test.js

@@ -1,24 +1,57 @@
 // implement a function countChar that counts the number of times a character occurs in a string
 import { countChar } from "./count.js";
-// Given a string `str` and a single character `char` to search for,
-// When the countChar function is called with these inputs,
-// Then it should:
 
 // Scenario: Multiple Occurrences
-// Given the input string `str`,
-// And a character `char` that occurs one or more times in `str` (e.g., 'a' in 'aaaaa'),
-// When the function is called with these inputs,
-// Then it should correctly count occurrences of `char`.
-
+// Given a string `str` and a character `char` that appears several times,
+// When the function is called,
+// Then it should correctly count each occurrence.
 test("should count multiple occurrences of a character", () => {
   const str = "aaaaa";
   const char = "a";
   const count = countChar(str, char);
   expect(count).toEqual(5);
 });
 
+// Scenario: Single Occurrence
+// Given a string containing exactly one match,
+// When the function is called,
+// Then it should return 1.
+test("should count a single occurrence of a character", () => {
+  const str = "banana";
+  const char = "n";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});
+
 // Scenario: No Occurrences
-// Given the input string `str`,
-// And a character `char` that does not exist within `str`.
-// When the function is called with these inputs,
-// Then it should return 0, indicating that no occurrences of `char` were found.
+// Given a string with no matching character,
+// When the function is called,
+// Then it should return 0.
+test("should return 0 when the character does not occur", () => {
+  const str = "hello";
+  const char = "z";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Edge case: Empty String
+// Given an empty string,
+// When the function is called with any character,
+// Then it should return 0.
+test("should return 0 for an empty string", () => {
+  const str = "";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+
+// Edge case: Character at start and end
+// Given a string where the character appears at both ends,
+// When the function is called,
+// Then it should count both occurrences.
+test("should count characters at the start and end of the string", () => {
+  const str = "ahelloa";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});

practice-tdd/get-ordinal-number.js

@@ -1,3 +1,23 @@
 export function getOrdinalNumber(num) {
-  return "1st";
+  const absNum = Math.abs(num);
+  const lastTwoDigits = absNum % 100;
+  const lastDigit = absNum % 10;
+
+  if (lastTwoDigits >= 11 && lastTwoDigits <= 13) {
+    return `${num}th`;
+  }
+
+  if (lastDigit === 1) {
+    return `${num}st`;
+  }
+
+  if (lastDigit === 2) {
+    return `${num}nd`;
+  }
+
+  if (lastDigit === 3) {
+    return `${num}rd`;
+  }
+
+  return `${num}th`;
 }

practice-tdd/get-ordinal-number.test.js

@@ -18,3 +18,23 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+test("should append 'nd' for numbers ending with 2, except those ending with 12", () => {
+  expect(getOrdinalNumber(2)).toEqual("2nd");
+  expect(getOrdinalNumber(22)).toEqual("22nd");
+  expect(getOrdinalNumber(102)).toEqual("102nd");
+});
+
+test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+  expect(getOrdinalNumber(3)).toEqual("3rd");
+  expect(getOrdinalNumber(23)).toEqual("23rd");
+  expect(getOrdinalNumber(103)).toEqual("103rd");
+});
+
+test("should append 'th' for all other numbers, including 11, 12 and 13", () => {
+  expect(getOrdinalNumber(4)).toEqual("4th");
+  expect(getOrdinalNumber(11)).toEqual("11th");
+  expect(getOrdinalNumber(12)).toEqual("12th");
+  expect(getOrdinalNumber(13)).toEqual("13th");
+  expect(getOrdinalNumber(111)).toEqual("111th");
+});

practice-tdd/repeat-str.js

@@ -1,5 +1,16 @@
-export function repeatStr() {
+export function repeatStr(str, count) {
   // Your implementation of this function must *not* call String.prototype.repeat (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat).
   // The goal is to re-implement that function, not to use it.
-  return "hellohellohello";
+
+  if (count < 0) {
+    throw new Error("count must be non-negative");
+  }
+
+  let result = "";
+
+  for (let i = 0; i < count; i++) {
+    result += str;
+  }
+
+  return result;
 }

practice-tdd/repeat-str.test.js

@@ -20,13 +20,22 @@ test("should repeat the string count times", () => {
 // Given a target string `str` and a `count` equal to 1,
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
+test("should return the original string when count is 1", () => {
+  expect(repeatStr("hello", 1)).toEqual("hello");
+});
 
 // Case: Handle count of 0:
 // Given a target string `str` and a `count` equal to 0,
 // When the repeatStr function is called with these inputs,
 // Then it should return an empty string.
+test("should return an empty string when count is 0", () => {
+  expect(repeatStr("hello", 0)).toEqual("");
+});
 
 // Case: Handle negative count:
 // Given a target string `str` and a negative integer `count`,
 // When the repeatStr function is called with these inputs,
 // Then it should throw an error, as negative counts are not valid.
+test("should throw an error for negative count", () => {
+  expect(() => repeatStr("hello", -1)).toThrow("count must be non-negative");
+});