def setUp(self):
self.encoder_builder = AutomaticJSONEncoderClassBuilder()
class TestAutomaticJSONEncoderClassBuilder(unittest.TestCase):
"""
Tests for `AutomaticJSONEncoderClassBuilder`.
"""
def setUp(self):
self.encoder_builder = AutomaticJSONEncoderClassBuilder()
def test_get_json_encoders_for_type_if_not_known(self):
self.assertIsNone(self.encoder_builder.get_json_encoders_for_type(JSONEncoder))
def test_get_json_encoders_for_type_has_encoders_for_standard_types(self):
repeat_to_test_reset = True
types_to_check = [dict, list, tuple, str, int, float, bool, type(None)]
while repeat_to_test_reset:
for type_to_check in types_to_check:
self.assertTrue(issubclass(self.encoder_builder.get_json_encoders_for_type(type_to_check), JSONEncoder))
self.encoder_builder.reset_registered_json_encoders()
repeat_to_test_reset = False
def test_get_json_encoders_for_type_if_registered(self):
self.encoder_builder.register_json_encoder(JSONEncoder, JSONEncoder)
self.assertEqual(self.encoder_builder.get_json_encoders_for_type(JSONEncoder), JSONEncoder)
def test_reset_registered_json_encoders(self):
self.encoder_builder.register_json_encoder(JSONEncoder, JSONEncoder)
self.encoder_builder.reset_registered_json_encoders()
self.assertIsNone(self.encoder_builder.get_json_encoders_for_type(JSONEncoder))
def test_build_with_no_registered_encoders(self):
Encoder = self.encoder_builder.build()
self.assertTrue(issubclass(Encoder, JSONEncoder))
# Should work with types supported by default
test_object = {1: 2}
self.assertEqual(json.dumps(test_object, cls=Encoder), json.dumps(test_object))
self.assertRaises(TypeError, json.dumps, StubModel(), cls=Encoder)
def test_build_with_registered_encoders(self):
# Sanity check
self.assertRaises(TypeError, json.dumps, StubModel(), cls=self.encoder_builder.build())
expect_encode = "expected encoding"
class StubModelJSONEncoder(JSONEncoder):
def default(self, o):
assert isinstance(o, StubModel)
return expect_encode
self.encoder_builder.register_json_encoder(StubModel, StubModelJSONEncoder)
self.assertEqual(json.dumps(StubModel(), cls=self.encoder_builder.build()), json.dumps(expect_encode))
def test_build_not_influenced_by_future_registrations(self):
Encoder = self.encoder_builder.build()
expect_encode = "expected encoding"
class StubModelJSONEncoder(JSONEncoder):
def default(self, o):
assert isinstance(o, StubModel)
return expect_encode
self.encoder_builder.register_json_encoder(StubModel, StubModelJSONEncoder)
self.assertRaises(TypeError, json.dumps, StubModel(), cls=Encoder)
self.assertEqual(json.dumps(StubModel(), cls=self.encoder_builder.build()), json.dumps(expect_encode))