thesecretsquad / toyrobotsimulator

Toy Robot Simulation

Toy robot simulation designed using east oriented code:

• http://jamesladdcode.com/2007/02/02/draft-a-design-compass-east-oriented/
• http://jamesladdcode.com/2009/08/01/east-clean-and-dry/
• http://jamesladdcode.com/2009/10/01/more-east/
• http://jamesladdcode.com/2011/06/12/more-east-2/

Description

• 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 position X,Y and facing NORTH, SOUTH, EAST or WEST.

• The origin (0,0) can be considered to be the SOUTH 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 another PLACE command. The application should discard all commands in the sequence until a valid PLACE command has been executed.

• MOVE will move the toy robot one unit forward in the direction it is currently facing.

• LEFT and RIGHT will rotate the robot 90 degrees in the specified direction without changing the position of the robot.

• REPORT will announce the X,Y and F of the robot. This can be in any form, but standard output is sufficient.

• A robot that is not on the table can choose the ignore the MOVE, LEFT, RIGHT and REPORT commands.

• Input can be from a file, or from standard input, as the developer chooses.

• Provide test data to exercise the application.

Constraints

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

PLACE 0,0,NORTH
MOVE
REPORT

Output: 0,1,NORTH

PLACE 0,0,NORTH
LEFT
REPORT

Output: 0,0,WEST

PLACE 1,2,EAST
MOVE
MOVE
LEFT
MOVE
REPORT

Output: 3,3,NORTH

toyrobotsimulator's Issues

SRP - Captured Output regex

The ToyRobotSimulatorTest has methods to help with pattern matching and constructing a Pattern. These don't belong in the Test and should instead be in a separate class similar to how CapturingPrintStream is used. This will make the Test size smaller.

Maybe even have a Matcher that allows you to match with or without a newline and thus remove
additional methods that are about matching from the Test.

Handy method ...

Maybe allow Simulator.run to take a command or commands.
This will make the tests cleaner.

The implementation of run(command) can then call enterCommand and then run() without
parameters.