Toy Robot Simulator

A robot that accepts commands to move around an empty table.

Rules:

• A robot should ignore commands that take if off the table
• A robot should reject commands when not on the table
• A robot should not be placed off of the table

Commands

• MOVE Attempts to move the robot forward in the direction it is facing
• PLACE X,Y,F Attempts to place the robot at X,Y and facing the direction F
• LEFT Rotates a robot 90 degrees left
• RIGHT Rotates a robot 90 degrees right
• REPORT Outputs the robots position and direction (X,Y,F)

Usage

Built using ruby 2.1.7.

To use, run the following from toy_robot_simulator/:

ruby toy_robot_simulator.rb -f example_input.txt

example_input.txt can be a path to any file. The file should contain commands mentioned above with each command on a newline.

Design

Toy Robot Simulator uses the command design pattern to queue and execute commands. This way we make it clear and obvious where to add a new command, easier to add a new command, and separates the what/who/when. For example, the robot knows nothing about the instructions. All we need to do is create a command in the lib/commands/ folder, update ValidateInstructions, and bind the command in RobotClient.

Extra reading: https://github.com/nslocum/design-patterns-in-ruby#commands