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diff --git a/diplomacy/utils/tests/test_jsonable.py b/diplomacy/utils/tests/test_jsonable.py
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+++ b/diplomacy/utils/tests/test_jsonable.py
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+# ==============================================================================
+# Copyright (C) 2019 - Philip Paquette, Steven Bocco
+#
+#  This program is free software: you can redistribute it and/or modify it under
+#  the terms of the GNU Affero General Public License as published by the Free
+#  Software Foundation, either version 3 of the License, or (at your option) any
+#  later version.
+#
+#  This program is distributed in the hope that it will be useful, but WITHOUT
+#  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+#  FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for more
+#  details.
+#
+#  You should have received a copy of the GNU Affero General Public License along
+#  with this program.  If not, see <https://www.gnu.org/licenses/>.
+# ==============================================================================
+""" Test Jsonable. """
+import ujson as json
+
+from diplomacy.utils import parsing
+from diplomacy.utils.jsonable import Jsonable
+from diplomacy.utils.sorted_dict import SortedDict
+from diplomacy.utils.sorted_set import SortedSet
+
+class MyJsonable(Jsonable):
+    """ Example of class derived from Jsonable. """
+    __slots__ = ('field_a', 'field_b', 'field_c', 'field_d', 'field_e', 'field_f', 'field_g')
+
+    model = {
+        'field_a': bool,
+        'field_b': str,
+        'field_c': parsing.OptionalValueType(float),
+        'field_d': parsing.DefaultValueType(str, 'super'),
+        'field_e': parsing.SequenceType(int),
+        'field_f': parsing.SequenceType(float, sequence_builder=SortedSet.builder(float)),
+        'field_g': parsing.DefaultValueType(parsing.DictType(str, int, SortedDict.builder(str, int)), {'x': -1})
+    }
+
+    def __init__(self, **kwargs):
+        """ Constructor """
+        self.field_a = None
+        self.field_b = None
+        self.field_c = None
+        self.field_d = None
+        self.field_e = None
+        self.field_f = None
+        self.field_g = {}
+        super(MyJsonable, self).__init__(**kwargs)
+
+def test_jsonable_parsing():
+    """ Test parsing for Jsonable. """
+
+    attributes = ('field_a', 'field_b', 'field_c', 'field_d', 'field_e', 'field_f', 'field_g')
+
+    # Building and validating
+    my_jsonable = MyJsonable(field_a=False, field_b='test', field_e={1}, field_f=[6.5])
+    for attribute_name in attributes:
+        assert hasattr(my_jsonable, attribute_name)
+    assert isinstance(my_jsonable.field_a, bool)
+    assert isinstance(my_jsonable.field_b, str)
+    assert my_jsonable.field_c is None
+    assert isinstance(my_jsonable.field_d, str), my_jsonable.field_d
+    assert isinstance(my_jsonable.field_e, list)
+    assert isinstance(my_jsonable.field_f, SortedSet)
+    assert isinstance(my_jsonable.field_g, SortedDict)
+    assert my_jsonable.field_d == 'super'
+    assert my_jsonable.field_e == [1]
+    assert my_jsonable.field_f == SortedSet(float, (6.5,))
+    assert len(my_jsonable.field_g) == 1 and my_jsonable.field_g['x'] == -1
+
+    # Building from its json representation and validating
+    from_json = MyJsonable.from_dict(json.loads(json.dumps(my_jsonable.to_dict())))
+    for attribute_name in attributes:
+        assert hasattr(from_json, attribute_name), attribute_name
+    assert from_json.field_a == my_jsonable.field_a
+    assert from_json.field_b == my_jsonable.field_b
+    assert from_json.field_c == my_jsonable.field_c
+    assert from_json.field_d == my_jsonable.field_d
+    assert from_json.field_e == my_jsonable.field_e
+    assert from_json.field_f == my_jsonable.field_f
+    assert from_json.field_g == my_jsonable.field_g