diff --git a/code-challenges/challenges-07.test.js b/code-challenges/challenges-07.test.js new file mode 100644 index 0000000..8ae1bcf --- /dev/null +++ b/code-challenges/challenges-07.test.js @@ -0,0 +1,293 @@ +'use strict'; + +// to learn more about the cheerio library and what it is doing, look at their documentation: https://www.npmjs.com/package/cheerio +const cheerio = require('cheerio'); + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 1 - Review + +Write a function named addTea that uses jQuery to add tea to the shopping list. +------------------------------------------------------------------------------------------------ */ + +let $ = createSnippetWithJQuery(` + +`); + + // Solution code here... + const addTea = () => $('ul').append('
  • tea
    • ') + + + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 2 + +Write a function named forLoopTwoToThe that, given an array of integers as input, iterates over the array and returns a new array. The returned array should contain the result of raising 2 to the power of the original input element. + +You may choose to complete this challenge using a for loop, for...in syntax, or for...of syntax. + +For example, twoToThe([1,2,3]) returns [2,4,8] because 2 ^ 1 = 2, 2 ^ 2 = 4, and 2 ^ 3 = 8. +------------------------------------------------------------------------------------------------ */ + +const forLoopTwoToThe = (arr) => { + // Solution code here... + let returnarray = []; + for (let i=0; i< arr.length; i++) { + returnarray.push(Math.pow(2, arr[i])); + } + return returnarray; +}; + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 3 + +Write a function named forEachTwoToThe that produces the same output as your forLoopTwoToThe function from challenge 1, but uses forEach instead of a for loop. +------------------------------------------------------------------------------------------------ */ + +const forEachTwoToThe = (arr) => { + // Solution code here... + let returnarray = []; + arr.forEach(value => { + returnarray.push(Math.pow(2, value)) + }) + return returnarray; +}; + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 4 + +Write a function named mapTwoToThe that produces the same output as your forLoopTwoToThe function from challenge 1 and your forEachTwoToThe function from challenge 2, but uses map instead of a for loop or forEach. +------------------------------------------------------------------------------------------------ */ + + // Solution code here... + const mapTwoToThe = (arr) => arr.map(value => Math.pow(2, value)); + + + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 5 - Stretch Goal + +Write a function named charCode that, given an array of letters as an input, uses map to return a new array where each element is the result of the `charCodeAt` method on the original array element. + +Read the MDN documentation on String.charCodeAt() if necessary. + +For example: charCode(['h','i']) returns [104, 105]. +------------------------------------------------------------------------------------------------ */ + +const charCode = (arr) => { + // Solution code here... +}; + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 6 - Stretch Goal + +Write a function that, given an array of numbers as input, uses map to return a new array where each element is either the string "even" or the string "odd", based on each value. + +If any element in the array is not a number, the resulting array should have the string "N/A" in its place. + +For example: evenOdd([1,2,3]) returns ['odd','even','odd']. +------------------------------------------------------------------------------------------------ */ + +const evenOdd = (arr) => { + // Solution code here... +}; + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 7 - Stretch Goal + +Use the snorlaxAbilities data, below, for this challenge. + +Write a function named extractAbilities that, given the array of abilities, uses map to create an array containing only the ability name. + +Note: Because this function is expecting the array of abilities, it will be invoked as: +extractAbilities(snorlaxAbilities.abilities) +------------------------------------------------------------------------------------------------ */ + +const snorlaxAbilities = { + abilities: [ + { + slot: 3, + is_hidden: true, + ability: { + url: 'https://pokeapi.co/api/v2/ability/82/', + name: 'gluttony', + }, + }, + { + slot: 2, + is_hidden: false, + ability: { + url: 'https://pokeapi.co/api/v2/ability/56/', + name: 'cute charm', + }, + }, + { + slot: 1, + is_hidden: false, + ability: { + url: 'https://pokeapi.co/api/v2/ability/17/', + name: 'immunity', + }, + }, + ], + name: 'snorlax', + weight: 4600, +}; + +const extractAbilities = (arr) => { + // Solution code here... +}; + +/* ------------------------------------------------------------------------------------------------ +CHALLENGE 8 - Stretch Goal + +Use the snorlaxStats data, below, for this challenge. + +Write a function named extractStats that, given an array of stats, uses map to return an array of objects containing the stat name and the total. + +The total should be the sum of the effort and the baseStat. + +Here is an example of a single array element: { name: 'speed', total: 35 } +------------------------------------------------------------------------------------------------ */ + +const snorlaxStats = { + stats: [ + { + stat: { + url: 'https://pokeapi.co/api/v2/stat/6/', + name: 'speed', + }, + effort: 5, + baseStat: 30, + }, + { + stat: { + url: 'https://pokeapi.co/api/v2/stat/5/', + name: 'special-defense', + }, + effort: 2, + baseStat: 110, + }, + { + stat: { + url: 'https://pokeapi.co/api/v2/stat/4/', + name: 'special-attack', + }, + effort: 9, + baseStat: 65, + }, + ], + name: 'snorlax', + weight: 4600, +}; + +const extractStats = (arr) => { + // Solution code here... +}; + +/* ------------------------------------------------------------------------------------------------ +TESTS + +All the code below will verify that your functions are working to solve the challenges. + +DO NOT CHANGE any of the below code. + +Run your tests from the console: jest challenges-07.test.js + +------------------------------------------------------------------------------------------------ */ + +describe('Testing challenge 1', () => { + test('It should add tea to the list', () => { + addTea(); + expect($('li:nth-child(6)').text()).toStrictEqual('tea'); + }) +}); + +describe('Testing challenge 2', () => { + test('It should return two raised to the power of the integer', () => { + expect(forLoopTwoToThe([0, 4, 5])).toStrictEqual([1, 16, 32]); + expect(forLoopTwoToThe([0, 4, 5]).length).toStrictEqual(3); + }); + + test('It should return decimals if the integer is negative', () => { + expect(forLoopTwoToThe([-1, -2, -3])).toStrictEqual([0.5, 0.25, 0.125]); + }); +}); + +describe('Testing challenge 3', () => { + test('It should return two raised to the power of the integer', () => { + expect(forEachTwoToThe([0, 4, 5])).toStrictEqual([1, 16, 32]); + expect(forEachTwoToThe([0, 4, 5]).length).toStrictEqual(3); + }); + + test('It should return decimals if the integer is negative', () => { + expect(forEachTwoToThe([-1, -2, -3])).toStrictEqual([0.5, 0.25, 0.125]); + }); +}); + +describe('Testing challenge 4', () => { + test('It should return two raised to the power of the integer', () => { + expect(mapTwoToThe([0, 4, 5])).toStrictEqual([1, 16, 32]); + expect(mapTwoToThe([0, 4, 5]).length).toStrictEqual(3); + }); + + test('It should return decimals if the integer is negative', () => { + expect(mapTwoToThe([-1, -2, -3])).toStrictEqual([0.5, 0.25, 0.125]); + }); +}); + +xdescribe('Testing challenge 5', () => { + test('It should return an array containing the character code for each letter', () => { + expect(charCode(['C', 'o', 'd', 'e', '3', '0', '1'])).toStrictEqual([ 67, 111, 100, 101, 51, 48, 49 ]); + expect(charCode(['C', 'o', 'd', 'e', '3', '0', '1']).length).toStrictEqual(7); + }); +}); + +xdescribe('Testing challenge 6', () => { + test('It should return an array containing the keys from an object', () => { + expect(evenOdd([5, 8, 2, 6, 9, 13, 542, 541])).toStrictEqual([ 'odd', 'even', 'even', 'even', 'odd', 'odd', 'even', 'odd' ]); + expect(evenOdd([5, 8, 2, 6, 9, 13, 542, 541]).length).toStrictEqual(8); + }); + + test('It should work with all odd numbers', () => { + expect(evenOdd([1, 3, 5, 7, 9])).toStrictEqual([ 'odd', 'odd', 'odd', 'odd', 'odd' ]); + expect(evenOdd([1, 3, 5, 7, 9]).length).toStrictEqual(5); + }); + + test('It should work with all even numbers', () => { + expect(evenOdd([2, 4, 6, 8, 10])).toStrictEqual([ 'even', 'even', 'even', 'even', 'even' ]); + expect(evenOdd([2, 4, 6, 8, 10]).length).toStrictEqual(5); + }); + + test('It should return the string "N/A" if a non-number is included in the array', () => { + expect(evenOdd([5, 8, 2, 'hi'])).toStrictEqual([ 'odd', 'even', 'even', 'N/A' ]); + expect(evenOdd([5, 8, 2, 'hi']).length).toStrictEqual(4); + }); +}); + +xdescribe('Testing challenge 7', () => { + test('It should return an array containing only the ability names', () => { + expect(extractAbilities(snorlaxAbilities.abilities)).toStrictEqual(['gluttony', 'cute charm', 'immunity']); + expect(extractAbilities(snorlaxAbilities.abilities).length).toStrictEqual(3); + }); +}); + +xdescribe('Testing challenge 8', () => { + test('It should return an array containing objects with name and total values', () => { + expect(extractStats(snorlaxStats.stats)).toStrictEqual([ + { name: 'speed', total: 35, }, + { name: 'special-defense', total: 112, }, + { name: 'special-attack', total: 74, }, + ]); + expect(extractStats(snorlaxStats.stats).length).toStrictEqual(3); + }); +}); + +function createSnippetWithJQuery(html){ + return cheerio.load(html); +};