Demonstrate URI.extract bug

uri_extract_failures.rb

require 'uri'
require 'test/unit'

class UriExtractTest < Test::Unit::TestCase
  def test_extract
    expected = 'http://example.com'
    sample = %{'#{expected}'}
    result = URI.extract(sample, ['http']).first
    assert_equal expected, result
  end

  def test_extract_with_trailing_slash
    expected = 'http://example.com/'
    sample = %{'#{expected}'}
    result = URI.extract(sample, ['http']).first
    assert_equal expected, result
  end

  def test_extract_with_trailing_slash_and_double_quote
    expected = 'http://example.com/'
    sample = %{"#{expected}"}
    result = URI.extract(sample, ['http']).first
    assert_equal expected, result
  end

  def test_extract_with_path
    expected = 'http://example.com/path'
    sample = %{'#{expected}'}
    result = URI.extract(sample, ['http']).first
    assert_equal expected, result
  end
end