begin
  require "socket"
  require "test/unit"
rescue LoadError
end


class TestSocket_TCPSocket < Test::Unit::TestCase
  def test_initialize_failure
    s = TCPServer.new("localhost", nil)
    server_port = s.addr[1]

    c = TCPSocket.new("localhost", server_port)
    client_port = c.addr[1]

    begin
      # TCPServer.new uses SO_REUSEADDR so we must create a failure on the
      # local address.
      TCPSocket.new("localhost", server_port, "localhost", client_port)
      flunk "expected SystemCallError"
    rescue SystemCallError => e
      assert_match "for \"localhost\" port #{client_port}", e.message
    end
  end

  def test_recvfrom
    svr = TCPServer.new("localhost", 0)
    th = Thread.new {
      c = svr.accept
      c.write "foo"
      c.close
    }
    addr = svr.addr
    sock = TCPSocket.open(addr[3], addr[1])
    assert_equal(["foo", nil], sock.recvfrom(0x10000))
  ensure
    th.kill if th
    th.join if th
  end

  def test_encoding
    svr = TCPServer.new("localhost", 0)
    th = Thread.new {
      c = svr.accept
      c.write "foo\r\n"
      c.close
    }
    addr = svr.addr
    sock = TCPSocket.open(addr[3], addr[1])
    assert_equal(true, sock.binmode?)
    s = sock.gets
    assert_equal("foo\r\n", s)
    assert_equal(Encoding.find("ASCII-8BIT"), s.encoding)
  ensure
    th.kill if th
    th.join if th
    sock.close if sock
  end
end if defined?(TCPSocket)