Birmingham | 26-ITP-May | Gabriel Pawuoi | Sprint 3 | Implement and rewrite tests

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

@@ -8,30 +8,28 @@
 // - "Reflex angle" for angles greater than 180° and less than 360°
 // - "Invalid angle" for angles outside the valid range.
 
-// Assumption: The parameter is a valid number. (You do not need to handle non-numeric inputs.)
-
-// Acceptance criteria:
-// After you have implemented the function, write tests to cover all the cases, and
-// execute the code to ensure all tests pass.
-
 function getAngleType(angle) {
-  // TODO: Implement this function
+  if (angle <= 0 || angle >= 360) return "Invalid angle";
+  if (angle === 90) return "Right angle";
+  if (angle === 180) return "Straight angle";
+  if (angle < 90) return "Acute angle";
+  if (angle < 180) return "Obtuse angle";
+  return "Reflex angle";
 }
 
-// The line below allows us to load the getAngleType function into tests in other files.
-// This will be useful in the "rewrite tests with jest" step.
 module.exports = getAngleType;
 
-// This helper function is written to make our assertions easier to read.
-// If the actual output matches the target output, the test will pass
 function assertEquals(actualOutput, targetOutput) {
   console.assert(
     actualOutput === targetOutput,
     `Expected ${actualOutput} to equal ${targetOutput}`
   );
 }
 
-// TODO: Write tests to cover all cases, including boundary and invalid cases.
-// Example: Identify Right Angles
-const right = getAngleType(90);
-assertEquals(right, "Right angle");
+assertEquals(getAngleType(90), "Right angle");
+assertEquals(getAngleType(45), "Acute angle");
+assertEquals(getAngleType(135), "Obtuse angle");
+assertEquals(getAngleType(180), "Straight angle");
+assertEquals(getAngleType(270), "Reflex angle");
+assertEquals(getAngleType(0), "Invalid angle");
+assertEquals(getAngleType(360), "Invalid angle");

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

@@ -2,32 +2,23 @@
 // when given two numbers, a numerator and a denominator, it should return true if
 // the given numbers form a proper fraction, and false otherwise.
 
-// Assumption: The parameters are valid numbers (not NaN or Infinity).
-
-// Note: If you are unfamiliar with proper fractions, please look up its mathematical definition.
-
-// Acceptance criteria:
-// After you have implemented the function, write tests to cover all the cases, and
-// execute the code to ensure all tests pass.
-
 function isProperFraction(numerator, denominator) {
-  // TODO: Implement this function
+  if (denominator === 0) return false;
+  return Math.abs(numerator) < Math.abs(denominator);
 }
 
-// The line below allows us to load the isProperFraction function into tests in other files.
-// This will be useful in the "rewrite tests with jest" step.
 module.exports = isProperFraction;
 
-// Here's our helper again
 function assertEquals(actualOutput, targetOutput) {
   console.assert(
     actualOutput === targetOutput,
     `Expected ${actualOutput} to equal ${targetOutput}`
   );
 }
 
-// TODO: Write tests to cover all cases.
-// What combinations of numerators and denominators should you test?
-
-// Example: 1/2 is a proper fraction
 assertEquals(isProperFraction(1, 2), true);
+assertEquals(isProperFraction(2, 1), false);
+assertEquals(isProperFraction(3, 3), false);
+assertEquals(isProperFraction(-1, 2), true);
+assertEquals(isProperFraction(1, -2), true);
+assertEquals(isProperFraction(1, 0), false);

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

@@ -1,54 +1,33 @@
-// This problem involves playing cards: https://en.wikipedia.org/wiki/Standard_52-card_deck
-
 // Implement a function getCardValue, when given a string representing a playing card,
 // should return the numerical value of the card.
-
-// A valid card string will contain a rank followed by the suit.
-// The rank can be one of the following strings:
-//   "A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"
-// The suit can be one of the following emojis:
-//   "♠", "♥", "♦", "♣"
-// For example: "A♠", "2♥", "10♥", "J♣", "Q♦", "K♦".
-
-// When the card is an ace ("A"), the function should return 11.
-// When the card is a face card ("J", "Q", "K"), the function should return 10.
-// When the card is a number card ("2" to "10"), the function should return its numeric value.
-
-// When the card string is invalid (not following the above format), the function should
-// throw an error.
-
-// Acceptance criteria:
-// After you have implemented the function, write tests to cover all the cases, and
-// execute the code to ensure all tests pass.
-
 function getCardValue(card) {
-  // TODO: Implement this function
+  const suit = card.slice(-1);
+  const rank = card.slice(0, -1);
+  const validSuits = ["♠", "♥", "♦", "♣"];
+  const validRanks = ["A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K"];
+  if (!validSuits.includes(suit) || !validRanks.includes(rank)) {
+    throw new Error(`Invalid card: ${card}`);
+  }
+  if (rank === "A") return 11;
+  if (["J", "Q", "K"].includes(rank)) return 10;
+  return Number(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;
-
-// Helper functions to make our assertions easier to read.
 function assertEquals(actualOutput, targetOutput) {
   console.assert(
     actualOutput === targetOutput,
     `Expected ${actualOutput} to equal ${targetOutput}`
   );
 }
-
-// TODO: Write tests to cover all outcomes, including throwing errors for invalid cards.
-// Examples:
 assertEquals(getCardValue("9♠"), 9);
-
-// Handling invalid cards
+assertEquals(getCardValue("A♠"), 11);
+assertEquals(getCardValue("10♥"), 10);
+assertEquals(getCardValue("J♣"), 10);
+assertEquals(getCardValue("Q♦"), 10);
+assertEquals(getCardValue("K♦"), 10);
 try {
   getCardValue("invalid");
-
-  // This line will not be reached if an error is thrown as expected
-  console.error("Error was not thrown for invalid card 😢");
+  console.error("Error was not thrown for invalid card");
 } catch (e) {
-  console.log("Error thrown for invalid card 🎉");
-}
-
-// What other invalid card cases can you think of?
+  console.log("Error thrown for invalid card");
+}

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

@@ -1,20 +1,33 @@
-// This statement loads the getAngleType function you wrote in the implement directory.
-// We will use the same function, but write tests for it using Jest in this file.
 const getAngleType = require("../implement/1-get-angle-type");
 
-// TODO: Write tests in Jest syntax to cover all cases/outcomes,
-// including boundary and invalid cases.
-
-// Case 1: Acute angles
 test(`should return "Acute angle" when (0 < angle < 90)`, () => {
-  // Test various acute angles, including boundary cases
   expect(getAngleType(1)).toEqual("Acute angle");
   expect(getAngleType(45)).toEqual("Acute angle");
   expect(getAngleType(89)).toEqual("Acute angle");
 });
 
-// Case 2: Right angle
-// Case 3: Obtuse angles
-// Case 4: Straight angle
-// Case 5: Reflex angles
-// Case 6: Invalid angles
+test(`should return "Right angle" for exactly 90`, () => {
+  expect(getAngleType(90)).toEqual("Right angle");
+});
+
+test(`should return "Obtuse angle" when (90 < angle < 180)`, () => {
+  expect(getAngleType(91)).toEqual("Obtuse angle");
+  expect(getAngleType(135)).toEqual("Obtuse angle");
+  expect(getAngleType(179)).toEqual("Obtuse angle");
+});
+
+test(`should return "Straight angle" for exactly 180`, () => {
+  expect(getAngleType(180)).toEqual("Straight angle");
+});
+
+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");
+});
+
+test(`should return "Invalid angle" for angles outside 0-360`, () => {
+  expect(getAngleType(0)).toEqual("Invalid angle");
+  expect(getAngleType(360)).toEqual("Invalid angle");
+  expect(getAngleType(-10)).toEqual("Invalid angle");
+});

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

@@ -1,10 +1,24 @@
 // 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");
 
-// TODO: Write tests in Jest syntax to cover all combinations of positives, negatives, zeros, and other categories.
+test(`should return true when |numerator| < |denominator|`, () => {
+  expect(isProperFraction(1, 2)).toEqual(true);
+  expect(isProperFraction(-1, 2)).toEqual(true);
+  expect(isProperFraction(1, -2)).toEqual(true);
+  expect(isProperFraction(-1, -2)).toEqual(true);
+});
+
+test(`should return false when |numerator| >= |denominator|`, () => {
+  expect(isProperFraction(2, 1)).toEqual(false);
+  expect(isProperFraction(3, 3)).toEqual(false);
+});
 
-// Special case: numerator is zero
-test(`should return false when denominator is zero`, () => {
-  expect(isProperFraction(1, 0)).toEqual(false);
+test(`should return true when |numerator| < |denominator| (negative numerator)`, () => {
+  expect(isProperFraction(-1, 2)).toEqual(true);
+  expect(isProperFraction(-3, 2)).toEqual(false);
 });
+
+test(`should return true when |numerator| < |denominator| (negative denominator)`, () => {
+  expect(isProperFraction(1, -2)).toEqual(true);
+  expect(isProperFraction(3, -2)).toEqual(false);
+});

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

@@ -1,20 +1,23 @@
-// 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");
 
-// TODO: Write tests in Jest syntax to cover all possible outcomes.
-
-// Case 1: Ace (A)
 test(`Should return 11 when given an ace card`, () => {
-  expect(getCardValue("A♠")).toEqual(11);
+  expect(getCardValue("A\u2660")).toEqual(11);
+  expect(getCardValue("A\u2665")).toEqual(11);
 });
 
-// Suggestion: Group the remaining test data into these categories:
-//   Number Cards (2-10)
-//   Face Cards (J, Q, K)
-//   Invalid Cards
+test(`Should return numeric value for number cards 2-10`, () => {
+  expect(getCardValue("2\u2665")).toEqual(2);
+  expect(getCardValue("5\u2666")).toEqual(5);
+  expect(getCardValue("10\u2665")).toEqual(10);
+});
 
-// 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
+test(`Should return 10 for face cards J, Q, K`, () => {
+  expect(getCardValue("J\u2663")).toEqual(10);
+  expect(getCardValue("Q\u2666")).toEqual(10);
+  expect(getCardValue("K\u2660")).toEqual(10);
+});
 
+test(`Should throw an error for invalid cards`, () => {
+  expect(() => getCardValue("invalid")).toThrow();
+  expect(() => getCardValue("")).toThrow();
+});