Word Connector

app.rb

require_relative "word_connector.rb"

# gets user input in the form of a string
puts "Please list your favorite color or colors, without using commas:"
favorite_colors = gets.chomp

# allows only valid input
while favorite_colors.include?(",")
  puts "Invalid. Please try again without using commas:"
  favorite_colors = gets.chomp
end

# splits string at each " " into an array
favorite_colors = favorite_colors.split

# creates a new instance of the WordConnector class
colors = WordConnector.new(favorite_colors)

# calls join_color_array method and provides output
puts colors.join_color_array(favorite_colors)

word_connector.rb

# creates WordConnector class with one attribute
class WordConnector
  attr_accessor :color_array
  
  # initializes WordConnector class
  #
  # color_array - array with string values representing colors
  #
  # returns self
  def initialize(color_array)
    @color_array = color_array
  end
  
  # join_color_array method joins the array into a string based on the length
  #
  # array - array 
  #
  # returns a string
  def join_color_array(array)
    if array.length == 1
      array.join
    elsif array.length == 2
      array.insert(-2, "and")
      array.join(" ")
    else
      "#{array[0..-2].join(", ")}, and #{array[-1]}"
    end
  end
end

word_connector_test.rb

require "minitest/autorun"
require_relative "word_connector.rb"

class WordConnectorTest < Minitest::Test
  # One of my specs is that the join_color_array method should join the array
  # properly based on the length of the array
 
  def test_join_color_array
    array1 = ["eggplant"]
    array2 = ["cerulean", "crimson"]
    array3 = ["violet", "sunshine", "burgundy"]
    array4 = ["hot hot pink", "atomic turquoise", "purple haze", "ultraviolet"]
    
    colors1 = WordConnector.new(array1)
    colors2 = WordConnector.new(array2)
    colors3 = WordConnector.new(array3)
    colors4 = WordConnector.new(array4)
    
    assert_equal("eggplant", colors1.join_color_array(array1))
    assert_equal("cerulean and crimson", colors2.join_color_array(array2))
    assert_equal("violet, sunshine, and burgundy", colors3.join_color_array(array3))
    assert_equal("hot hot pink, atomic turquoise, purple haze, and ultraviolet", colors4.join_color_array(array4))
  end
  
end