Define position. Update robot.position according to user inputs. Add robot and position specs

Author: SelenaSmall

lib/position.rb

@@ -0,0 +1,9 @@
+# Position class
+class Position
+  attr_accessor :x, :y
+
+  def initialize(x, y)
+    @x = x
+    @y = y
+  end
+end

lib/robot.rb

@@ -1,8 +1,31 @@
+require_relative 'position'
+
 # Robot Class
 class Robot
   attr_reader :position
 
   def intialize
     @position = nil
   end
+
+  # Place the robot
+  def place(command)
+    place = /^PLACE\s+\d+\s*,\s*\d+\s*$/
+
+    if place.match?(command)
+      command, x, y = command.tr(',', ' ').split
+
+      Position.new(x.to_i, y.to_i)
+    end
+  end
+
+  # Update the robot's position
+  def update_robot(new_position)
+    @position = new_position
+  end
+
+  # Check the robot has been placed
+  def not_in_place?
+    @position.nil?
+  end
 end

spec/position_spec.rb

@@ -0,0 +1,23 @@
+require 'rspec'
+require 'spec_helper'
+require './lib/position'
+
+describe Position do
+  describe '#initialize' do
+    it 'should have an x attribute which is an integer' do
+      instance = Position.new(0, 0)
+
+      expect(instance.x).to be_a Integer
+      expect(instance.x).to be >= 0
+      expect(instance.x).to be <= 4
+    end
+
+    it 'should have a y attribute which is an integer' do
+      instance = Position.new(0, 0)
+
+      expect(instance.y).to be_a Integer
+      expect(instance.y).to be >= 0
+      expect(instance.y).to be <= 4
+    end
+  end
+end

spec/robot_spec.rb

@@ -10,4 +10,51 @@
       expect(instance.position).to be_nil
     end
   end
+
+  describe '#place' do
+    it 'should return an instance of Position' do
+      instance = Robot.new
+      command = 'PLACE 1,2'
+
+      expect(instance.place(command)).to be_a Position
+    end
+
+    it 'should return nil if command is empty' do
+      instance = Robot.new
+      command = ''
+
+      expect(instance.place(command)).to be_nil
+    end
+
+    it 'should return nil if command does not match the place pattern' do
+      instance = Robot.new
+      command = 'get'
+
+      expect(instance.place(command)).to be_nil
+    end
+  end
+
+  describe '#update_robot' do
+    it 'should return an instance of Position' do
+      instance = Robot.new
+      new_position = Position.new(0, 1)
+
+      expect(instance.update_robot(new_position)).to be_a Position
+    end
+
+    it 'should return false if new_position is nil' do
+      instance = Robot.new
+      new_position = nil
+
+      expect(instance.update_robot(new_position)).to be_nil
+    end
+  end
+
+  describe '#not_in_place?' do
+    it 'should return true if position attribute is nil' do
+      instance = Robot.new
+
+      expect(instance.not_in_place?).to be true
+    end
+  end
 end

toy_robot.rb

@@ -1,26 +1,21 @@
 #!/usr/bin/ruby
 
-require_relative './lib/table'
 require_relative './lib/robot'
 
-# Initialize Table objects
-table = Table.new
 robot = Robot.new
 
-
-# Is this a valid position on the table
-puts table.valid_position?(1, 0)
-
-# Ensure the robot's position is nil
-puts 'Robot position is nil' if robot.position.nil?
-
 # Keep reading user inputs while the program is running
 loop do
   puts 'Select your command'
   input = gets.chomp
 
   unless input == 'EXIT'
-    puts 'Robot has been placed' if input == 'PLACE'
+    position = robot.place(input)
+    puts "Position: #{position.x},#{position.y}"
+
+    robot.update_robot(position)
+
+    puts 'placed' unless robot.not_in_place?
     next
   end