gistfile1.rb

require 'minitest/autorun'
require 'uri'

class UriValidator
  ALLOWED_PROTOS = [URI::HTTP, URI::HTTPS, URI::FTP]

  def initialize uri
    @uri = uri
  end

  def validate!
    parsed_uri = URI.parse @uri
    ALLOWED_PROTOS.include? parsed_uri.class
  rescue URI::InvalidURIError
    false
  end
end

class TestUriValidator < Minitest::Test
  URIS = {
    'http://test.com' => true,
    'https://test.com' => true,
    'ftp://good.uri.com/test' => true,
    'shit happens' => false,
    'alsow12414@@!!!wrong' => false,
    '' => false,
    nil => false
  }

  URIS.each_with_index do |(uri, result), idx|
    define_method "test_uri_#{idx}" do
      assert_equal result, UriValidator.new(uri).validate!
    end
  end
end