LONDON | MAY_25 | EMILIANO URUENA | SPRINT3

Sprint-3/1-key-implement/1-get-angle-type.js

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+// Implement a function getAngleType
+// Build up your function case by case, writing tests as you go
+// The first test and case is written for you. The next case has a test, but no code.
+// Execute this script in your terminal
+// node 1-get-angle-type.js
+// The assertion error will tell you what the expected output is
+// Write the code to pass the test
+// Then, write the next test! :) Go through this process until all the cases are implemented
+
+function getAngleType(angle) {
+   if (angle === 90) return "Right angle";
+   // read to the end, complete line 36, then pass your test here
+}
+
+// we're going to use this helper function 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}`
+  );
+}
+
+// Acceptance criteria:
+
+// Given an angle in degrees,
+// When the function getAngleType is called with this angle,
+// Then it should:
+
+// Case 1: Identify Right Angles:
+// When the angle is exactly 90 degrees,
+// Then the function should return "Right angle"
+const right = getAngleType(90);
+assertEquals(right, "Right angle");
+
+// Case 2: Identify Acute Angles:
+// When the angle is less than 90 degrees,
+// Then the function should return "Acute angle"
+const acute = getAngleType(45);
+assertEquals(acute, "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"
+const obtuse = getAngleType(120);
+// ====> 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
+
+// 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

Sprint-3/1-key-implement/2-is-proper-fraction.js

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+// Implement a function isProperFraction
+// Write assertions for your function to check it works in different cases
+// Terms:
+// Fractions: https://www.bbc.co.uk/bitesize/topics/zt9n6g8/articles/zjxpp4j
+// Written here like this: 1/2 == Numerator/Denominator
+// the first test and first case is written for you
+// complete the rest of the tests and cases
+// write one test at a time, and make it pass, build your solution up methodically
+
+function isProperFraction(numerator, denominator) {
+    if (numerator < denominator) return true;
+}
+
+// here's our helper again
+function assertEquals(actualOutput, targetOutput) {
+  console.assert(
+    actualOutput === targetOutput,
+    `Expected ${actualOutput} to equal ${targetOutput}`
+  );
+}
+
+// Acceptance criteria:
+
+// Proper Fraction check:
+// Input: numerator = 2, denominator = 3
+// target output: true
+// Explanation: The fraction 2/3 is a proper fraction, where the numerator is less than the denominator. The function should return true.
+const properFraction = isProperFraction(2, 3);
+assertEquals(properFraction, true);
+
+// Improper Fraction check:
+// Input: numerator = 5, denominator = 2
+// target output: false
+// Explanation: The fraction 5/2 is an improper fraction, where the numerator is greater than or equal to the denominator. The function should return false.
+const improperFraction = isProperFraction(5, 2);
+assertEquals(improperFraction, false);
+
+// Negative Fraction check:
+// 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 negativeFraction = isProperFraction(-4, 7);
+// ====> 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
+
+// Stretch:
+// What other scenarios could you test for?

Sprint-3/1-key-implement/3-get-card-value.js

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+// This problem involves playing cards: https://en.wikipedia.org/wiki/Standard_52-card_deck
+
+// You will need to implement a function getCardValue
+// the function takes a single parameter, a string representing a playing card
+// the function should return the numerical value of the card
+// the first test and first case is written for you
+// complete the rest of the tests and cases
+// 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;
+}
+
+// You need to write assertions for your function to check it works in different cases
+// we're going to use this helper function 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}`
+  );
+}
+// Acceptance criteria:
+
+// Given a card string in the format "A♠" (representing a card in blackjack - the last character will always be an emoji for a suit, and all characters before will be a number 2-10, or one letter of J, Q, K, A),
+// When the function getCardValue is called with this card string as input,
+// Then it should return the numerical card value
+const aceofSpades = getCardValue("A♠");
+assertEquals(aceofSpades, 11);
+
+// Handle Number Cards (2-10):
+// Given a card with a rank between "2" and "9",
+// 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
+
+// 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.
+
+// 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.
+
+// 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."

Sprint-3/2-mandatory-rewrite/1-get-angle-type.js

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+function getAngleType(angle) {
+  if (angle === 90) return "Right angle";
+   if (angle < 90) return "Acute angle";
+   if (angle >90 && angle < 180) return "Obtuse angle";
+   if (angle === 180) return "Straight angle";
+   if (angle > 180) return "Reflex angle";
+}
+
+
+
+
+
+
+
+
+// Don't get bogged down in this detail
+// Jest uses CommonJS module syntax by default as it's quite old
+// We will upgrade our approach to ES6 modules in the next course module, so for now 
+// we have just written the CommonJS module.exports syntax for you
+module.exports = getAngleType;

Sprint-3/2-mandatory-rewrite/1-get-angle-type.test.js

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+const getAngleType = require("./1-get-angle-type");
+
+test("Should identify Right angle for exactly 90 degrees", () => {
+  expect(getAngleType(90)).toEqual("Right angle");
+});
+
+// REPLACE the comments with the tests
+// make your test descriptions as clear and readable as possible
+
+// 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' for angles less than 90 degrees (e.g., 45°) ", () => {
+  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' for angles greater than 90 and less than 180 degrees (e.g., 120°)", () => {
+  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' for angles of exactly 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' for angles greater than 180 and less than 360 degrees (e.g., 200°)", () => {
+  expect(getAngleType(200)).toEqual("Reflex angle");
+});

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.js

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+function isProperFraction(numerator, denominator) {
+    if (numerator < 0 ) numerator *= -1;
+    if (denominator < 0 ) denominator *= -1;
+    if (numerator < denominator) return true;
+    if (numerator >= denominator) return false;
+}
+
+module.exports = isProperFraction;

Sprint-3/2-mandatory-rewrite/2-is-proper-fraction.test.js

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+const isProperFraction = require("./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 an improper fraction", () => {
+  expect(isProperFraction(5, 2)).toEqual(false);
+});
+
+// Case 3: Identify Negative Fractions:
+test("should return true for a Negative Fraction", () => {
+  expect(isProperFraction(-4, 7)).toEqual(true);
+});
+
+// Case 4: Identify Equal Numerator and Denominator:
+test("should return false for improper fraction because the numerator is equal to the denominator", () => {
+  expect(isProperFraction(3, 3)).toEqual(false);
+});
+
+//
+test("should return false, The fraction -5/-2 is a improper fraction because the absolute value of the numerator (5) is more than the absolute value of denominator (2). The function should return false.", () => {
+  expect(isProperFraction(-5, -2)).toEqual(false);
+});

Sprint-3/2-mandatory-rewrite/3-get-card-value.js

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+function getCardValue(card) {
+  let rank = card.slice(0,-1);
+  if (rank === "A") return 11;
+  if (Number.isInteger(Number(rank))) return Number(rank);
+  if (rank === 'K' || rank === 'J' || rank === 'Q'){ return 10;
+  } else { 
+    return "Invalid card rank.";}
+}
+module.exports = getCardValue;

Sprint-3/2-mandatory-rewrite/3-get-card-value.test.js

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+const getCardValue = require("./3-get-card-value");
+
+test("should return 11 for Ace of Spades", () => {
+    const aceofSpades = getCardValue("A♠");
+    expect(aceofSpades).toEqual(11);
+    });
+
+// Case 2: Handle Number Cards (2-10):
+test("should return 5 for five of Hearts", () => {
+    expect(getCardValue("5♥")).toEqual(5);
+    });
+
+// Case 3: Handle Face Cards (J, Q, K):
+test("should return 10 for King of Hearts", () => {
+    expect(getCardValue("K♥")).toEqual(10);
+    });
+
+// Case 4: Handle Ace (A):
+test("should return 11 for Ace of Diamonds", () => {
+    expect(getCardValue("A♦")).toEqual(11);
+});
+
+// Case 5: Handle Invalid Cards:
+test("should return 'Invalid card rank.' for invalid cards.", () => {
+    expect(getCardValue("Z♠")).toEqual("Invalid card rank.");
+    });

Sprint-3/3-mandatory-practice/implement/count.js

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+function countChar(stringOfCharacters, findCharacter) {
+    let count = 0;
+    for (i = 0 ;i < stringOfCharacters.length; i++) {
+        if (stringOfCharacters[i] === findCharacter) count += 1;
+    }
+    return count;
+}
+
+module.exports = countChar;

Sprint-3/3-mandatory-practice/implement/count.test.js

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+// implement a function countChar that counts the number of times a character occurs in a string
+const countChar = require("./count");
+// 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 may occur multiple times with overlaps within str (e.g., 'a' in 'aaaaa'),
+// When the function is called with these inputs,
+// Then it should correctly count overlapping occurrences of char (e.g., 'a' appears five times in 'aaaaa').
+
+test("should count multiple occurrences of a character", () => {
+  const str = "aaaaa";
+  const char = "a";
+  const count = countChar(str, char);
+  expect(count).toEqual(5);
+});
+
+// Scenario: No Occurrences
+// Given the input string str,
+// 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 count multiple occurrences of a character", () => {
+  const str = "astronaut";
+  const char = "t";
+  const count = countChar(str, char);
+  expect(count).toEqual(2);
+});
+
+test("should count multiple occurrences of a character", () => {
+  const str = "multiply";
+  const char = "e";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});
+

Sprint-3/3-mandatory-practice/implement/get-ordinal-number.js

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+function getOrdinalNumber(num) {
+    let sufix = 'th';
+ if (num === 11 || num === 12 || num === 13){ 
+    sufix = 'th';
+    return num + sufix;
+ } else {
+ if (num.toString().slice(-1) === '1') sufix = 'st';
+ if (num.toString().slice(-1) === '2') sufix = 'nd';
+ if (num.toString().slice(-1) === '3') sufix = 'rd';
+ return num + sufix;
+}
+}   
+
+module.exports = getOrdinalNumber;