Kata 8/25 DLL Spec

require "rspec"
require "color"

describe Color do
  it "should stand alone" do
    r = Color.new("red")

    r.color.should == "red"
    r.next.should == nil
    r.previous.should == nil
  end

  it "should link between two colors" do
    r = Color.new("red")
    o = Color.new("orange")

    r.link_to(o)

    r.next.should == o
    r.previous.should == nil
    o.previous.should == r
    o.next.should == nil
  end

  it "should link a whole rainbow" do
    r = Color.new("red")
    o = Color.new("orange")
    y = Color.new("yellow")
    g = Color.new("green")
    b = Color.new("blue")
    i = Color.new("indigo")
    v = Color.new("violet")

    r.link_to(o).link_to(y).link_to(g).link_to(b).link_to(i).link_to(v)

    r.next.next.next.next.next.next.color.should match /violet/
    v.previous.previous.previous.previous.previous.previous.color.should match /red/
  end
end