tests/test_msgpack_deserialization.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Licensed under the Apache License, Version 2.0 (the "License");
   4 # you may not use this file except in compliance with the License.
   5 # You may obtain a copy of the License at
   6 #
   7 #     http://www.apache.org/licenses/LICENSE-2.0
   8 #
   9 # Unless required by applicable law or agreed to in writing, software
  10 # distributed under the License is distributed on an "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 # See the License for the specific language governing permissions and
  13 # limitations under the License.
  14
  15 # alt0 non-generics plain
  16 # alt1 non-generics metadata
  17 # alt2     generics plain
  18 # alt3     generics metadata
  19 # alt4     generics metadata cache_metadata_strings
  20
  21 import test_deserialization
  22 import msgpack
  23 import msgpack::read
  24 import json
  25 #alt2# import test_deserialization_serial
  26 #alt3# import test_deserialization_serial
  27 #alt4# import test_deserialization_serial
  28
  29 var entities = new TestEntities
  30
  31 var tests = entities.without_generics
  32 #alt2#tests = entities.with_generics
  33 #alt3#tests = entities.with_generics
  34 #alt4#tests = entities.with_generics
  35
  36 for o in tests do
  37         var plain = true
  38         #alt1#plain = false
  39         #alt3#plain = false
  40         #alt4#plain = false
  41
  42         var writer = new BytesWriter
  43         var serializer = new MsgPackSerializer(writer)
  44         serializer.plain_msgpack = plain
  45         #alt4#serializer.cache_metadata_strings = true
  46         serializer.serialize o
  47         var bytes = writer.bytes
  48
  49         # Nit source
  50         print "# 1. Nit source:\n{o}\n"
  51
  52         # Generated MessagePack
  53         print "# 2. MsgPack:\n{bytes.chexdigest}\n"
  54
  55         # Python deserialization line to ensure compliance and otherwise debug
  56         #print "msgpack.unpackb(b'{bytes.chexdigest}')"
  57
  58         # Show readable structure of the generated MessagePack as JSON
  59         var msg = (new BytesReader(bytes)).read_msgpack
  60         var json = if msg != null then
  61                         msg.serialize_to_json(plain=true, pretty=true)
  62                 else "null"
  63         print "# 3. JSON:\n{json}\n"
  64
  65         # Deserialize
  66         var deserializer = new MsgPackDeserializer(new BytesReader(bytes))
  67         if serializer.plain_msgpack then
  68                 var deserialized = deserializer.deserialize(o.class_name)
  69                 print "# 4. Back in Nit (no metadata):\n{deserialized or else "null"}\n"
  70         else
  71                 var deserialized = deserializer.deserialize
  72                 print "# 4. Back in Nit (with metadata):\n{deserialized or else "null"}\n"
  73         end
  74 end