forward_match.rb

# 複数の文字列から前方一致部分の文字列を取り出す
def forward_match(strs)
  #TODO
end

# ruby forward_match.rb
if $0 == __FILE__
  require 'minitest/autorun'

  class ForwardMatchTest < Minitest::Test
    def test_simple_forward_match_array_size_is_two
      assert_equal 'abcd', forward_match(['abcdef', 'abcdxyz'])
    end

    def test_simple_forward_match_array_size_is_three
      assert_equal 'abc', forward_match(['abcdef', 'abcdxyz', 'abcABC'])
    end

    def test_complex_forward_match_array_size_is_two
      assert_equal 'abcd', forward_match(['abcdef', 'abcdxfz'])
    end
  end
end