A simulation of a toy robot moving on a square tabletop, of dimensions 5 units x 5 units. See Specification below for details.
$ brew update
$ brew install rbenv ruby-build
$ rbenv install 2.1.6
$ gem install bundler
$ bundle install
$ stepup changelog
$ bin/toy_robot interpret ./test_data/commands_1.txt
Code quality is attempted by using RSpec for testing, SimpleCov for code test coverage, Rubocop for static code analyzer, Reek to fix code smells, as well as Code Climate for quality metrics.
Run tests:
$ rspec
Check test coverage (after running rspec):
$ open coverage/index.html
Check code smells:
$ reek
Rubocop report:
$ open rubocop.html
- The application is a simulation of a toy robot moving on a square tabletop, of dimensions 5 units x 5 units.
- There are no other obstructions on the table surface.
- The robot is free to roam around the surface of the table, but must be prevented from falling to destruction. Any movement that would result in the robot falling from the table must be prevented, however further valid movement commands must still be allowed.
Create an application that can read in commands of the following form
PLACE X,Y,F
MOVE
LEFT
RIGHT
REPORT
PLACE
will put the toy robot on the table in positionX,Y
and facingNORTH
,SOUTH
,EAST
orWEST
.- The origin (
0,0
) can be considered to be theSOUTH WEST
most corner. - The first valid command to the robot is a
PLACE
command, after that, any sequence of commands may be issued, in any order, including anotherPLACE
command. The application should discard all commands in the sequence until a validPLACE
command has been executed MOVE
will move the toy robot one unit forward in the direction it is currently facing.LEFT
andRIGHT
will rotate the robot 90 degrees in the specified direction without changing the position of the robot.REPORT
will announce theX
,Y
andF
of the robot. This can be in any form, but standard output is sufficient.
- A robot that is not on the table can choose to ignore the
MOVE
,LEFT
,RIGHT
andREPORT
commands. - Input can be from a file, or from standard input, as the developer chooses.
- Provide test data to exercise the application.
The toy robot must not fall off the table during movement. This also includes the initial placement of the toy robot. Any move that would cause the robot to fall must be ignored.
Example Input and Output:
a)
PLACE 0,0,NORTH
MOVE
REPORT
Output: 0,1,NORTH
b)
PLACE 0,0,NORTH
LEFT
REPORT
Output: 0,0,WEST
c)
PLACE 1,2,EAST
MOVE
MOVE
LEFT
MOVE
REPORT
Output: 3,3,NORTH
The Ruby source files, the test data and any test code. It is not required to provide any graphical output showing the movement of the toy robot.
Copyright (c) 2015 Igor Escobar
See MIT LICENSE for details.