binary-handshake

binary_handshake.rb

require 'pry'

class SecretHandshake
  attr_accessor :binary

  def initialize(binary)
    @binary = binary
  end

  def commands

    translated_array = []
    binary_array = binary.to_s.split(//)

      if binary_array[-1] == "1"
        translated_array << "wink"
      end
      if binary_array[-2] == "1"
        translated_array << "double blink"
      end
      if binary_array[-3] == "1"
        translated_array << "close your eyes"
      end
      if binary_array[-4] == "1"
       translated_array << "jump"
      end

     binary.to_i > 9999 ? translated_array.reverse! : translated_array

  end

end

binary_handshake_spec.rb

require_relative './binary_handshake'

# # Binary Secret Handshake

# > There are 10 types of people in the world: Those who understand binary, and those who don't.

# You and your fellow flatirons are of those in the "know" when it comes to binary decide to come up with a secret "handshake".

# ```
# 1 = wink
# 10 = double blink
# 100 = close your eyes
# 1000 = jump


# 10000 = Reverse the order of the operations in the secret handshake.
# ```

# Write a program that will convert a binary number, represented as a string (i.e. "101010"), and convert it to the appropriate sequence of events for a secret handshake.


# ```
# handshake = SecretHandshake.new "1001"
# handshake.commands # => ["wink","jump"]

# handshake = SecretHandshake.new "11001"
# handshake.commands # => ["jump","wink"]
# ```

# The program should consider strings specifying an invalid binary as the value 0.

RSpec.configure do |config|
  # Use color in STDOUT
  config.color_enabled = true

  # Use color not only in STDOUT but also in pagers and files
  config.tty = true

  # Use the specified formatter
  config.formatter = :progress # :progress, :html, :textmate
end

describe 'SecretHandshake' do 
  it 'should know how to wink with a 1' do
    handshake = SecretHandshake.new("1")
    handshake.commands.should eq(["wink"])
  end    

  it 'should know how to double blink with a 10' do
    handshake = SecretHandshake.new("10")
    handshake.commands.should eq(["double blink"])
  end

  it 'should know how to close your eyes with 100' do
    handshake = SecretHandshake.new("100")
    handshake.commands.should eq(["close your eyes"])
  end

  it 'should know to jump with 1000' do
    handshake = SecretHandshake.new("1000")
    handshake.commands.should eq(["jump"])
  end

  it 'should know to wink double blink with 11' do
    handshake = SecretHandshake.new("11")
    handshake.commands.should eq(["wink","double blink"]) 
  end

  it 'should know to double blink, wink, with 10011' do
    handshake = SecretHandshake.new("10011")
    handshake.commands.should eq(["double blink","wink"])
  end

  it 'should get this complicated handshake correctly' do
    handshake = SecretHandshake.new("11111")
    handshake.commands.should eq(["jump","close your eyes","double blink","wink"])
  end

  it 'should not respond to an invalid code' do
    handshake = SecretHandshake.new("binary")
    handshake.commands.should eq([])
  end
end