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Add solution challenge 09 v1
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johnsi15 committed Dec 12, 2024
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39 changes: 39 additions & 0 deletions challenges-2024/challenge-09/README.md
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# Reto #9: 🚂 El tren magico

Los elfos están jugando con un tren 🚂 mágico que transporta regalos. Este tren se mueve en un tablero representado por un array de strings.

El tren está compuesto por una locomotora (@), seguida de sus vagones (o), y debe recoger frutas mágicas (*) que le sirve de combustible. El movimiento del tren sigue las siguientes reglas:

Recibirás dos parámetros board y mov.

board es un array de strings que representa el tablero:

@ es la locomotora del tren.
o son los vagones del tren.
* es una fruta mágica.
· son espacios vacíos.
mov es un string que indica el próximo movimiento del tren desde la cabeza del tren @:

'L': izquierda
'R': derecha
'U': arriba
'D': abajo.
Con esta información, debes devolver una cadena de texto:

'crash': Si el tren choca contra los bordes del tablero o contra sí mismo.
'eat': Si el tren recoge una fruta mágica (*).
'none': Si avanza sin chocar ni recoger ninguna fruta mágica.

```js
const board = [
'·····',
'*····',
'@····',
'o····',
'o····'
]

console.log(moveTrain(board, 'U'))
// ➞ 'eat'
// Porque el tren se mueve hacia arriba y encuentra una fruta mágica
```
184 changes: 184 additions & 0 deletions challenges-2024/challenge-09/jest.config.cjs
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/**
* For a detailed explanation regarding each configuration property, visit:
* https://jestjs.io/docs/configuration
*/

/** @type {import('jest').Config} */
const config = {
// All imported modules in your tests should be mocked automatically
// automock: false,

// Stop running tests after `n` failures
// bail: 0,

// The directory where Jest should store its cached dependency information
// cacheDirectory: "/tmp/jest_rs",

// Automatically clear mock calls, instances, contexts and results before every test
clearMocks: true,

// Indicates whether the coverage information should be collected while executing the test
// collectCoverage: false,

// An array of glob patterns indicating a set of files for which coverage information should be collected
// collectCoverageFrom: undefined,

// The directory where Jest should output its coverage files
// coverageDirectory: undefined,

// An array of regexp pattern strings used to skip coverage collection
// coveragePathIgnorePatterns: [
// "/node_modules/"
// ],

// Indicates which provider should be used to instrument code for coverage
coverageProvider: 'v8',

// A list of reporter names that Jest uses when writing coverage reports
// coverageReporters: [
// "json",
// "text",
// "lcov",
// "clover"
// ],

// An object that configures minimum threshold enforcement for coverage results
// coverageThreshold: undefined,

// A path to a custom dependency extractor
// dependencyExtractor: undefined,

// Make calling deprecated APIs throw helpful error messages
// errorOnDeprecated: false,

// The default configuration for fake timers
// fakeTimers: {
// "enableGlobally": false
// },

// Force coverage collection from ignored files using an array of glob patterns
// forceCoverageMatch: [],

// A path to a module which exports an async function that is triggered once before all test suites
// globalSetup: undefined,

// A path to a module which exports an async function that is triggered once after all test suites
// globalTeardown: undefined,

// A set of global variables that need to be available in all test environments
// globals: {},

// The maximum amount of workers used to run your tests. Can be specified as % or a number. E.g. maxWorkers: 10% will use 10% of your CPU amount + 1 as the maximum worker number. maxWorkers: 2 will use a maximum of 2 workers.
// maxWorkers: "50%",

// An array of directory names to be searched recursively up from the requiring module's location
// moduleDirectories: [
// "node_modules"
// ],

// An array of file extensions your modules use
moduleFileExtensions: ['js', 'mjs', 'cjs', 'jsx', 'ts', 'tsx', 'json', 'node'],

// A map from regular expressions to module names or to arrays of module names that allow to stub out resources with a single module
// moduleNameMapper: {},

// An array of regexp pattern strings, matched against all module paths before considered 'visible' to the module loader
// modulePathIgnorePatterns: [],

// Activates notifications for test results
// notify: false,

// An enum that specifies notification mode. Requires { notify: true }
// notifyMode: "failure-change",

// A preset that is used as a base for Jest's configuration
// preset: undefined,

// Run tests from one or more projects
// projects: undefined,

// Use this configuration option to add custom reporters to Jest
// reporters: undefined,

// Automatically reset mock state before every test
// resetMocks: false,

// Reset the module registry before running each individual test
// resetModules: false,

// A path to a custom resolver
// resolver: undefined,

// Automatically restore mock state and implementation before every test
// restoreMocks: false,

// The root directory that Jest should scan for tests and modules within
// rootDir: undefined,

// A list of paths to directories that Jest should use to search for files in
roots: ['<rootDir>'],

// Allows you to use a custom runner instead of Jest's default test runner
// runner: "jest-runner",

// The paths to modules that run some code to configure or set up the testing environment before each test
// setupFiles: [],

// A list of paths to modules that run some code to configure or set up the testing framework before each test
// setupFilesAfterEnv: [],

// The number of seconds after which a test is considered as slow and reported as such in the results.
// slowTestThreshold: 5,

// A list of paths to snapshot serializer modules Jest should use for snapshot testing
// snapshotSerializers: [],

// The test environment that will be used for testing
// testEnvironment: "jest-environment-node",

// Options that will be passed to the testEnvironment
// testEnvironmentOptions: {},

// Adds a location field to test results
// testLocationInResults: false,

// The glob patterns Jest uses to detect test files
testMatch: ['**/__tests__/**/*.[jt]s?(x)', '**/?(*.)+(spec|test).[tj]s?(x)'],

// An array of regexp pattern strings that are matched against all test paths, matched tests are skipped
testPathIgnorePatterns: ['/node_modules/'],

// The regexp pattern or array of patterns that Jest uses to detect test files
// testRegex: [],

// This option allows the use of a custom results processor
// testResultsProcessor: undefined,

// This option allows use of a custom test runner
// testRunner: "jest-circus/runner",

// A map from regular expressions to paths to transformers
transform: {
'\\.[jt]sx?$': 'babel-jest',
},

// An array of regexp pattern strings that are matched against all source file paths, matched files will skip transformation
// transformIgnorePatterns: [
// "/node_modules/",
// "\\.pnp\\.[^\\/]+$"
// ],

// An array of regexp pattern strings that are matched against all modules before the module loader will automatically return a mock for them
// unmockedModulePathPatterns: undefined,

// Indicates whether each individual test should be reported during the run
// verbose: undefined,

// An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
// watchPathIgnorePatterns: [],

// Whether to use watchman for file crawling
// watchman: true,
}

module.exports = config
64 changes: 64 additions & 0 deletions challenges-2024/challenge-09/moveTrain.js
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const board = ['·····', '*····', '@····', 'o····', 'o····']

export function moveTrain(board, mov) {
for (let i = 0; i < board.length; i++) {
const row = board[i]

for (let j = 0; j < row.length; j++) {
const cell = row[j]

if (cell === '@') {
const nextRow = board[i + 1] || []
const prevRow = board[i - 1] || []

const nextCell = nextRow[j]
const prevCell = prevRow[j]
const nextCellRight = row[j + 1]
const prevCellRight = row[j - 1]

if (mov === 'U') {
if (prevCell === '*') return 'eat'
if (!prevCell || prevCell === 'o') return 'crash'
if (prevCell === '.') return 'none'
}

if (mov === 'D') {
if (nextCell === '*') return 'eat'
if (!nextCell || nextCell === 'o') return 'crash'
if (nextCell === '.') return 'none'
}

if (mov === 'L') {
if (prevCellRight === '*') return 'eat'
if (!prevCellRight || prevCellRight === 'o') return 'crash'
if (prevCellRight === '.') return 'none'
}

if (mov === 'R') {
if (nextCellRight === '*') return 'eat'
if (!nextCellRight || nextCellRight === 'o') return 'crash'
if (nextCellRight === '.') return 'none'
}
break
}
}
}

return 'none'
}

console.log(moveTrain(board, 'U'))
// ➞ 'eat'
// Porque el tren se mueve hacia arriba y encuentra una fruta mágica

console.log(moveTrain(board, 'D'))
// ➞ 'crash'
// El tren se mueve hacia abajo y la cabeza se choca consigo mismo

console.log(moveTrain(board, 'L'))
// ➞ 'crash'
// El tren se mueve a la izquierda y se choca contra la pared

console.log(moveTrain(board, 'R'))
// ➞ 'none'
// El tren se mueve hacia derecha y hay un espacio vacío en la derecha
29 changes: 29 additions & 0 deletions challenges-2024/challenge-09/package.json
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{
"name": "challenge-2024-challenge-09",
"version": "1.0.0",
"description": "Reto #9: 🚂 El tren magico",
"main": "moveTrain.js",
"type": "module",
"scripts": {
"prod": "node moveTrain.js",
"test": "jest"
},
"keywords": [
"adventjs",
"challenge",
"desafíos",
"retos",
"JavaScript",
"programación",
"navidad"
],
"author": "John Serrano",
"license": "ISC",
"devDependencies": {
"@babel/core": "7.23.5",
"@babel/preset-env": "7.23.5",
"babel-jest": "29.7.0",
"@types/jest": "29.5.10",
"jest": "29.7.0"
}
}
11 changes: 11 additions & 0 deletions challenges-2024/challenge-09/test/moveTrain.test.js
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import { moveTrain } from '../moveTrain'
describe('First repeat gift', () => {
test('Should return an array without duplicates', () => {
const board = ['·····', '*····', '@····', 'o····', 'o····']

const result = moveTrain(board, 'U')

expect(result).toBeDefined()
expect(result).toBe('abcde')
})
})

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