Initial commit
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### Intellij ###
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# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
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# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
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# User-specific stuff:
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.idea/**/workspace.xml
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.idea/**/tasks.xml
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.idea/dictionaries
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# Sensitive or high-churn files:
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.idea/**/dataSources/
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.idea/**/dataSources.ids
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.idea/**/dataSources.xml
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.idea/**/dataSources.local.xml
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.idea/**/sqlDataSources.xml
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.idea/**/dynamic.xml
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.idea/**/uiDesigner.xml
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# Gradle:
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.idea/**/gradle.xml
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.idea/**/libraries
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# CMake
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cmake-build-debug/
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# Mongo Explorer plugin:
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.idea/**/mongoSettings.xml
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## File-based project format:
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*.iws
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## Plugin-specific files:
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# IntelliJ
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/out/
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# mpeltonen/sbt-idea plugin
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.idea_modules/
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# JIRA plugin
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atlassian-ide-plugin.xml
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# Cursive Clojure plugin
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.idea/replstate.xml
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# Ruby plugin and RubyMine
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/.rakeTasks
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# Crashlytics plugin (for Android Studio and IntelliJ)
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com_crashlytics_export_strings.xml
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crashlytics.properties
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crashlytics-build.properties
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fabric.properties
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### Intellij Patch ###
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# Comment Reason: https://github.com/joeblau/gitignore.io/issues/186#issuecomment-215987721
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# *.iml
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# modules.xml
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# .idea/misc.xml
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# *.ipr
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# Sonarlint plugin
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.idea/sonarlint
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### Java ###
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# Compiled class file
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# Log file
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*.log
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# BlueJ files
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*.ctxt
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# Mobile Tools for Java (J2ME)
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.mtj.tmp/
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# Package Files #
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*.war
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*.ear
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*.zip
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*.tar.gz
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*.rar
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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### Kotlin ###
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# Compiled class file
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# Log file
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# BlueJ files
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# Mobile Tools for Java (J2ME)
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# Package Files #
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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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### Scala ###
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# End of https://www.gitignore.io/api/java,scala,kotlin,eclipse,clojure,intellij
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@ -0,0 +1,79 @@
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# Wallapop Backend Tech Test
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Hello candidate!!
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Welcome to Wallapop and its backend technical test
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## Mars Rover refactoring kata
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We need to improve the existing solution that translates commands sent from Earth to instructions that are understood by our Rover on Mars
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Currently, the code is very complicated and tangled, so we'd like you to invest some time to clean it up
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### Functional requirements
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```
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Given:
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- a two dimensional map of Mars
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- the initial starting point and direction of the Rover
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When:
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- a command is received
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move `forward` or `backward` or rotate `left` or `right` (90 degrees)
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Then:
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- move the Rover
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if the Rover disappears over the edge of the map (the horizon), continue on the other side (remember, Mars is a sphere)
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```
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#### Bonus point
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After ensuring that the functional requirements have been met, as a bonus point (not necessary but more than welcome), add a new feature:
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```
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Given:
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- a list of obstacles with their exact location
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When:
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- Rover moves
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And:
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- Rover encounters an obstacle
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Then:
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- report back the obstacle. The Rover should stay in its previous position
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```
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## Your solution
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### Must (These points are mandatory)
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- Fulfill the [Functional Requirements](#functional-requirements) stated in this readme.
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- Refactor the provided code, creating new classes, methods or whatever needed.
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- Use any JVM language but, if you want to use one other than Java, please convert the initial codebase to that language.
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- Be testable. This means that we should not need to run the main app in order to check that everything is working.
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- Be self compiled.
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- Be self executable.
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- Have a SOLUTION.md containing all the relevant features of your provided solution.
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### Should (Nice to have)
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- Fulfill the [Bonus point](#bonus-point) section of this readme.
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- Be bug free.
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- Use any design patterns you know and feel that help solve this problem.
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- Be extensible to allow the introduction of new features in an easy way.
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- Use any package dependency mechanism.
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## Our evaluation
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- We will focus on your design and on your own code over the usage of frameworks and libraries
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- We will also take into account the evolution of your solution, not just the delivered code
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- We will evolve your solution with feasible features and evaluate how complex it is to implement them
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## How to do it
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This project is a [Template Project](https://help.github.com/en/articles/creating-a-repository-from-a-template) that allows you to create a new project of your own based on this one
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We would like you to maintain this new repository as private, and give access to `wallabackend` to evaluate it once you are done with your solution
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Please, let us know as soon as you finish, otherwise we will not start the review
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Thanks & good luck!!
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@ -0,0 +1 @@
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# MY SOLUTION
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@ -0,0 +1,81 @@
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import java.util.Scanner;
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public class MarsRover {
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public static void main(String[] args) {
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Scanner reader = new Scanner(System.in);
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System.out.println("Insert horizontal map size:");
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int sizex = reader.nextInt();
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System.out.println("Insert vertical map size:");
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int sizey = reader.nextInt();
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System.out.println("Insert horizontal initial rover position:");
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int roverx = reader.nextInt();
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System.out.println("Insert vertical initial rover position:");
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int rovery = reader.nextInt();
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System.out.println("Insert initial rover direction:");
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String roverz = reader.next(); //n = north, e = east, w = west, s = south
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do {
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System.out.println("Insert command (f = forward, b = backward, l = turn left, r = turn right):");
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String command = reader.next();
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if (command.equals("f")) {
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if (roverz.equals("n")) {
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rovery += 1;
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}
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if (roverz.equals("w")) {
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roverx -= 1;
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}
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if (roverz.equals("s")) {
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rovery -= 1;
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}
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if (roverz.equals("e")) {
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roverx += 1;
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}
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}
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if (command.equals("b")) {
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if (roverz.equals("n")) {
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rovery -= 1;
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}
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if (roverz.equals("w")) {
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roverx += 1;
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}
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if (roverz.equals("s")) {
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rovery += 1;
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}
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if (roverz.equals("e")) {
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roverx -= 1;
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}
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}
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if (command.equals("l")) {
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if (roverz.equals("n")) {
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roverz = "w";
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}
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if (roverz.equals("w")) {
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roverz = "s";
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}
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if (roverz.equals("s")) {
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roverz = "e";
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}
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if (roverz.equals("e")) {
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roverz = "n";
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}
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}
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if (command.equals("r")) {
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if (roverz.equals("n")) {
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roverz = "e";
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}
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if (roverz.equals("e")) {
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roverz = "s";
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}
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if (roverz.equals("s")) {
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roverz = "w";
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}
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if (roverz.equals("w")) {
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roverz = "n";
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}
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}
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System.out.println(String.format("Rover is at x:%d y:%d facing:%s", roverx, rovery, roverz));
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} while (true);
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}
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}
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