gistfile1.rb

value = "Don T Alias"
first_name, last_name = value.reverse.split(' ', 2).reverse.collect(&:reverse)
first_name = first_name.to_s
last_name  = last_name.to_s

# Refactored to take into account Xavier's pathological aversion to case statements:
  last_space_index = value.rindex(' ') || value.size
  first_name, last_name = value[0..last_space_index].strip, value[last_space_index..value.size].strip

---

    it 'splits the value and assigns it to first name and last name' do
      object.name = "Don Alias"
      object.first_name.should == "Don"
      object.last_name.should == 'Alias'
    end

    it 'splits the value and assigns every thing except the last word to first name, and last word to last name' do
      object.name = "Don T Alias"
      object.first_name.should == "Don T"
      object.last_name.should == 'Alias'
    end

    it 'when only one name is provided it blanks out last name' do
      object.name = "Don"
      object.first_name.should == "Don"
      object.last_name.should == ''
    end

    it 'when a blank string is provided it blanks both first and last name' do
      object.name = ""
      object.first_name.should == ""
      object.last_name.should == ''
    end