A simulation of a toy robot moving on a square tabletop of 5x5 dimension.

Configure the robot with appropriate input parser:

• JSON Parser

  Locobot::Config.input_parser = Locobot::Parser::JSONParser.new
  Locobot::Config.command_separator = '->'

• File Parser

  Locobot::Config.input_parser = Locobot::Parser::FileParser.new

Define the robot input commands, respectively:

• JSON input

  input = "{ \"commands\": \"PLACE 5, 5, NORTH -> MOVE -> LEFT -> RIGHT -> REPORT\" }"

• File input

  input = '/file/path/file_parser_sample_1.txt'

Feed the input and run the robot!

  Locobot::Config.input_parser.read input
  Locobot::Core.new.run

• No obstructions on the table
• The robot is free to roam around on the table
• The robot should not fall to destruction.
  • ignore any command that would result in the fall
  • continue with the next valid command
• The robot should receive an initial placement position
  • (0, 0) is the south west corner
• The robot should receive valid movement commands.
  • valid commands are:
    • PLACE(x, y, face): Position the robot at point (x, y), facing towards face.
    • MOVE: Move the robot one unit forward. (Ignored if robot is not on the tabletop).
    • LEFT: Rotate robot 90 degrees to the left. (Ignored if robot is not on the tabletop).
    • RIGHT: Rotate robot 90 degrees to the right. (Ignored if robot is not on the tabletop).
    • REPORT: Report current position of the robot. (Ignored if robot is not on the tabletop).
  • any commands before the initial PLACE must be ignored
  • multiple PLACE commands is valid
• The robot should read commands and execute them sequentially