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# -*- encoding: binary -*-
$stdout.sync = $stderr.sync = true
require 'test/unit'
require 'tempfile'
$-w = true
require 'tdb'

class Test_TDB_MT < Test::Unit::TestCase
  def setup
    @tdb = @tmp = nil
    @start_pid = $$
  end

  def teardown
    return if @start_pid != $$
    @tmp.close! if @tmp.respond_to?(:close!)
    @tdb.close if @tdb && ! @tdb.closed?
  end

  def test_make_threadsafe
    @tdb = TDB.new(nil)
    assert_kind_of TDB, @tdb
    assert ! @tdb.threadsafe?
    assert_nothing_raised { @tdb.threadsafe! }
    assert @tdb.threadsafe?
    @tdb.each { |k,v| assert_equal v, @tdb[k] }
  end

  def test_init_threadsafe
    @tdb = TDB.new(nil, :threadsafe => true)
    assert @tdb.threadsafe?
    @tdb.close
    @tdb = TDB.new(nil, :threadsafe => false)
    assert ! @tdb.threadsafe?
    @tdb.close
    @tdb = TDB.new(nil)
    assert ! @tdb.threadsafe?
    @tdb.close
  end

  def test_thread_safe_torture_test
    @tdb = TDB.new(nil)
    assert_nothing_raised { @tdb.threadsafe! }
    pid = fork do
      Thread.abort_on_exception = true
      threads = []
      blob = 'foo' * 1000
      nr = 10000
      t = Thread.new do
        while true
          Thread.pass
          @tdb.to_a
        end
      end
      threads << Thread.new { nr.times { |i| @tdb[i.to_s] = blob } }
      threads << Thread.new { nr.times { |i| @tdb[i.to_s] = blob } }
      threads << Thread.new { nr.times { |i| @tdb[i.to_s] = blob } }
      threads << Thread.new { nr.times { |i| @tdb[i.to_s] = blob } }
      threads << t

      t.kill
      threads.each { |t| t.join }
    end
    _, status = Process.waitpid2(pid)
    assert status.success?, status.inspect
  end

  def test_check_methods
    m = TDB.instance_methods.sort
    m -= Object.instance_methods
    m -= Enumerable.instance_methods
    m.map! { |x| x.to_sym }
    mt = TDB::MT.instance_methods.sort
    m -= [ :threadsafe! ]
    m += [ :include?, :member? ]
    m.sort!
    unwrapped = ( (m - mt) | (mt - m)).uniq
    assert unwrapped.empty?, "unwrapped methods: #{unwrapped.inspect}"
    @tdb = TDB.new(nil)
    respond_to?(:refute_match) and
      m.each { |meth| refute_match(/\bTDB::MT\b/, @tdb.method(meth).to_s) }
    @tdb.threadsafe!
    m.each { |meth| assert_match(/\bTDB::MT\b/, @tdb.method(meth).to_s) }
  end
end