content: from __future__ import print_function
  import array
  import pandas.msgpack as msgpack
  from pandas.msgpack import ExtType
  
  
  def test_pack_ext_type():
      def p(s):
          packer = msgpack.Packer()
          packer.pack_ext_type(0x42, s)
          return packer.bytes()
      assert p(b'A')        == b'\xd4\x42A'          # fixext 1
      assert p(b'AB')       == b'\xd5\x42AB'         # fixext 2
      assert p(b'ABCD')     == b'\xd6\x42ABCD'       # fixext 4
      assert p(b'ABCDEFGH') == b'\xd7\x42ABCDEFGH'   # fixext 8
      assert p(b'A'*16)     == b'\xd8\x42' + b'A'*16 # fixext 16
      assert p(b'ABC')      == b'\xc7\x03\x42ABC'        # ext 8
      assert p(b'A'*0x0123)     == b'\xc8\x01\x23\x42' + b'A'*0x0123 # ext 16
      assert p(b'A'*0x00012345) == b'\xc9\x00\x01\x23\x45\x42' + b'A'*0x00012345 # ext 32
  
  
  def test_unpack_ext_type():
      def check(b, expected):
          assert msgpack.unpackb(b) == expected
  
      check(b'\xd4\x42A',         ExtType(0x42, b'A'))        # fixext 1
      check(b'\xd5\x42AB',        ExtType(0x42, b'AB'))       # fixext 2
      check(b'\xd6\x42ABCD',      ExtType(0x42, b'ABCD'))     # fixext 4
      check(b'\xd7\x42ABCDEFGH',  ExtType(0x42, b'ABCDEFGH')) # fixext 8
      check(b'\xd8\x42' + b'A'*16, ExtType(0x42, b'A'*16))    # fixext 16
      check(b'\xc7\x03\x42ABC',   ExtType(0x42, b'ABC'))      # ext 8
      check(b'\xc8\x01\x23\x42' + b'A'*0x0123,
            ExtType(0x42, b'A'*0x0123))                        # ext 16
      check(b'\xc9\x00\x01\x23\x45\x42' + b'A'*0x00012345,
            ExtType(0x42, b'A'*0x00012345))                   # ext 32
  
  
  def test_extension_type():
      def default(obj):
          print('default called', obj)
          if isinstance(obj, array.array):
              typecode = 123 # application specific typecode
              data = obj.tostring()
              return ExtType(typecode, data)
          raise TypeError("Unknwon type object %r" % (obj,))
  
      def ext_hook(code, data):
          print('ext_hook called', code, data)
          assert code == 123
          obj = array.array('d')
          obj.fromstring(data)
          return obj
  
      obj = [42, b'hello', array.array('d', [1.1, 2.2, 3.3])]
      s = msgpack.packb(obj, default=default)
      obj2 = msgpack.unpackb(s, ext_hook=ext_hook)
      assert obj == obj2
  