West Midlands | ITP SEP | Jonathan Boahene | Sprint 3 |Implement and Rewrite Tests

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

@@ -12,7 +12,19 @@ function getAngleType(angle) {
     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.
+  // 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";
+  }
 }
 
 // The line below allows us to load the getAngleType function into tests in other files.
@@ -51,13 +63,18 @@ 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/line");
 
 // 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-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.
@@ -47,13 +48,34 @@ 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?
+// What other scenarios could you test for? Zero numerator => always proper
+const zeroNumerator = isProperFraction(0, 10);
+assertEquals(zeroNumerator, true);
+
+//Negarive denominator => use absoluet values
+const negativeDenominator = isProperFraction(3, -5);
+assertEquals(negativeDenominator, true);
+
+//Both negatives
+const bothNegative = isProperFraction(-2, -3);
+assertEquals(bothNegative, true);
+
+//fractions like 8/8 should be false
+const improperEqual = isProperFraction(9, 9);
+assertEquals(improperEqual, false);
+
+//zero denominator - maths says undefined so can return false or throw error
+const zeroDenominator = isProperFraction(1, 0);
+assertEquals(zeroDenominator, false);
+

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

@@ -8,11 +8,23 @@
 // 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);
+
+  // Numeric cards 2–10
+  if (["2", "3", "4", "5", "6", "7", "8", "9", "10"].includes(rank)) {
+    return Number(rank);
   }
+
+  // Face cards
+  if (["J", "Q", "K"].includes(rank)) return 10;
+
+  // Ace
+  if (rank === "A") return 11;
+
+  throw new Error("Invalid card rank");
 }
 
+
 // The line below allows us to load the getCardValue function into tests in other files.
 // This will be useful in the "rewrite tests with jest" step.
 module.exports = getCardValue;
@@ -40,11 +52,24 @@ 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 jack = getCardValue("J♣");
+assertEquals(jack, 10);
+
+const queen = getCardValue("Q♦");
+assertEquals(queen, 10);
+
+const king = getCardValue("K♥");
+assertEquals(king, 10);
+
+const ten = getCardValue("10♠");
+assertEquals(ten, 10);
+
 
 // Handle Ace (A):
 // Given a card with a rank of "A",
@@ -55,3 +80,10 @@ const fiveofHearts = getCardValue("5♥");
 // 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."
+try {
+  getCardValue("Z♠");
+  console.assert(false, "Expected an error for invalid rank");
+} catch (e) {
+  assertEquals(e.message, "Invalid card rank");
+}
+

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

@@ -12,15 +12,34 @@ 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 angles (< 90°)", () => {
+  expect(getAngleType(30)).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 (90° < angle < 180°)", () => {
+  expect(getAngleType(120)).toEqual("Obtuse angle");
+  expect(getAngleType(100)).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 angles (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 (180° < angle < 360°)", () => {
+  expect(getAngleType(200)).toEqual("Reflex angle");
+  expect(getAngleType(250)).toEqual("Reflex angle");
+  expect(getAngleType(359)).toEqual("Reflex angle");
+});

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

@@ -1,13 +1,23 @@
-// This statement loads the isProperFraction function you wrote in the implement directory.
-// We will use the same function, but write tests for it using Jest in this file.
 const isProperFraction = require("../implement/2-is-proper-fraction");
 
 test("should return true for a proper fraction", () => {
   expect(isProperFraction(2, 3)).toEqual(true);
 });
 
 // Case 2: Identify Improper Fractions:
+test("should return false for improper fractions (numerator >= denominator)", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);  // 5/2
+  expect(isProperFraction(7, 3)).toEqual(false);  // 7/3
+});
 
 // Case 3: Identify Negative Fractions:
+test("should correctly handle negative fractions using absolute value of numerator", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);  // |−4| < 7 → proper
+  expect(isProperFraction(-5, 2)).toEqual(false); // |−5| >= 2 → improper
+});
 
 // Case 4: Identify Equal Numerator and Denominator:
+test("should return false when numerator equals denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);  // 3/3
+  expect(isProperFraction(-6, -6)).toEqual(false); // -6/-6
+});

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

@@ -1,13 +1,37 @@
 // This statement loads the getCardValue function you wrote in the implement directory.
-// We will use the same function, but write tests for it using Jest in this file.
 const getCardValue = require("../implement/3-get-card-value");
 
+// Case 1: Ace
 test("should return 11 for Ace of Spades", () => {
   const aceofSpades = getCardValue("A♠");
   expect(aceofSpades).toEqual(11);
 });
 
-// Case 2: Handle Number Cards (2-10):
-// Case 3: Handle Face Cards (J, Q, K):
-// Case 4: Handle Ace (A):
-// Case 5: Handle Invalid Cards:
+// Case 2: Handle Number Cards (2–10)
+test("should return numeric value for number cards 2–10", () => {
+  expect(getCardValue("2♥")).toEqual(2);
+  expect(getCardValue("7♦")).toEqual(7);
+  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 J, Q, K", () => {
+  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 any Ace", () => {
+  expect(getCardValue("A♣")).toEqual(11);
+  expect(getCardValue("A♦")).toEqual(11);
+  expect(getCardValue("A♥")).toEqual(11);
+});
+
+// Case 5: Handle Invalid Cards
+test("should throw an error for invalid card rank", () => {
+  expect(() => getCardValue("Z♠")).toThrow("Invalid card rank");
+  expect(() => getCardValue("1♦")).toThrow("Invalid card rank");
+  expect(() => getCardValue("XY")).toThrow("Invalid card rank");
+});