require 'test/unit'

class TestRegexp < Test::Unit::TestCase
  def test_ruby_dev_24643
    assert_nothing_raised("[ruby-dev:24643]") { /(?:(?:[a]*[a])?b)*a*$/ =~ "aabaaca" }
  end

  def test_ruby_talk_116455
    assert_match(/^(\w{2,}).* ([A-Za-z\xa2\xc0-\xff]{2,}?)$/, "Hallo Welt")
  end

  def test_ruby_dev_24887
    assert_equal("a".gsub(/a\Z/, ""), "")
  end

  def test_yoshidam_net_20041111_1
    s = "[\xC2\xA0-\xC3\xBE]"
    assert_match(Regexp.new(s, nil, "u"), "\xC3\xBE")
  end

  def test_yoshidam_net_20041111_2
    assert_raise(RegexpError) do
      s = "[\xFF-\xFF]".force_encoding("utf-8")
      Regexp.new(s, nil, "u")
    end
  end

  def test_ruby_dev_31309
    assert_equal('Ruby', 'Ruby'.sub(/[^a-z]/i, '-'))
  end

  def test_assert_normal_exit
    # moved from knownbug.  It caused core.
    Regexp.union("a", "a")
  end

  def test_to_s
    assert_equal '(?-mix:\000)', Regexp.new("\0").to_s
  end

  def test_union
    assert_equal :ok, begin
      Regexp.union(
        "a",
        Regexp.new("\xc2\xa1".force_encoding("euc-jp")),
        Regexp.new("\xc2\xa1".force_encoding("utf-8")))
      :ng
    rescue ArgumentError
      :ok
    end
  end

  def test_named_capture
    m = /&(?<foo>.*?);/.match("aaa &amp; yyy")
    assert_equal("amp", m["foo"])
    assert_equal("amp", m[:foo])
    assert_equal(5, m.begin(:foo))
    assert_equal(8, m.end(:foo))
    assert_equal([5,8], m.offset(:foo))

    assert_equal("aaa [amp] yyy", "aaa &amp; yyy".sub(/&(?<foo>.*?);/, '[\k<foo>]'))

    assert_equal('#<MatchData "&amp; y" foo:"amp">',
      /&(?<foo>.*?); (y)/.match("aaa &amp; yyy").inspect)
    assert_equal('#<MatchData "&amp; y" 1:"amp" 2:"y">',
      /&(.*?); (y)/.match("aaa &amp; yyy").inspect)
    assert_equal('#<MatchData "&amp; y" foo:"amp" bar:"y">',
      /&(?<foo>.*?); (?<bar>y)/.match("aaa &amp; yyy").inspect)
    assert_equal('#<MatchData "&amp; y" foo:"amp" foo:"y">',
      /&(?<foo>.*?); (?<foo>y)/.match("aaa &amp; yyy").inspect)

    /(?<id>[A-Za-z_]+)/ =~ "!abc"
    assert_equal("abc", Regexp.last_match(:id))

    /a/ =~ "b"
    assert_equal(nil, Regexp.last_match)
    assert_equal(nil, Regexp.last_match(1))
    assert_equal(nil, Regexp.last_match(:foo))
  end
end