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|
import pytest
from channels_redis.serializers import (
JSONSerializer,
MsgPackSerializer,
SerializerDoesNotExist,
SerializersRegistry,
)
@pytest.fixture
def registry():
return SerializersRegistry()
class OnlySerialize:
def serialize(self, message):
return message
class OnlyDeserialize:
def deserialize(self, message):
return message
def bad_serializer():
pass
class NoopSerializer:
def serialize(self, message):
return message
def deserialize(self, message):
return message
@pytest.mark.parametrize(
"serializer_class", (OnlyDeserialize, OnlySerialize, bad_serializer)
)
def test_refuse_to_register_bad_serializers(registry, serializer_class):
with pytest.raises(AssertionError):
registry.register_serializer("custom", serializer_class)
def test_raise_error_for_unregistered_serializer(registry):
with pytest.raises(SerializerDoesNotExist):
registry.get_serializer("unexistent")
def test_register_custom_serializer(registry):
registry.register_serializer("custom", NoopSerializer)
serializer = registry.get_serializer("custom")
assert serializer.serialize("message") == "message"
assert serializer.deserialize("message") == "message"
@pytest.mark.parametrize(
"serializer_cls,expected",
(
(MsgPackSerializer, b"\x83\xa1a\xc3\xa1b\xc0\xa1c\x81\xa1d\x90"),
(JSONSerializer, b'{"a": true, "b": null, "c": {"d": []}}'),
),
)
@pytest.mark.parametrize("prefix_length", (8, 12, 0, -1))
def test_serialize(serializer_cls, expected, prefix_length):
"""
Test default serialization method
"""
message = {"a": True, "b": None, "c": {"d": []}}
serializer = serializer_cls(random_prefix_length=prefix_length)
serialized = serializer.serialize(message)
assert isinstance(serialized, bytes)
if prefix_length > 0:
assert serialized[prefix_length:] == expected
else:
assert serialized == expected
@pytest.mark.parametrize(
"serializer_cls,value",
(
(MsgPackSerializer, b"\x83\xa1a\xc3\xa1b\xc0\xa1c\x81\xa1d\x90"),
(JSONSerializer, b'{"a": true, "b": null, "c": {"d": []}}'),
),
)
@pytest.mark.parametrize(
"prefix_length,prefix",
(
(8, b"Q\x0c\xbb?Q\xbc\xe3|"),
(12, b"Q\x0c\xbb?Q\xbc\xe3|D\xfd9\x00"),
(0, b""),
(-1, b""),
),
)
def test_deserialize(serializer_cls, value, prefix_length, prefix):
"""
Test default deserialization method
"""
message = prefix + value
serializer = serializer_cls(random_prefix_length=prefix_length)
deserialized = serializer.deserialize(message)
assert isinstance(deserialized, dict)
assert deserialized == {"a": True, "b": None, "c": {"d": []}}
@pytest.mark.parametrize(
"serializer_cls,clear_value",
(
(MsgPackSerializer, b"\x83\xa1a\xc3\xa1b\xc0\xa1c\x81\xa1d\x90"),
(JSONSerializer, b'{"a": true, "b": null, "c": {"d": []}}'),
),
)
def test_serialization_encrypted(serializer_cls, clear_value):
"""
Test serialization rount-trip with encryption
"""
message = {"a": True, "b": None, "c": {"d": []}}
serializer = serializer_cls(
symmetric_encryption_keys=["a-test-key"], random_prefix_length=4
)
serialized = serializer.serialize(message)
assert isinstance(serialized, bytes)
assert serialized[4:] != clear_value
deserialized = serializer.deserialize(serialized)
assert isinstance(deserialized, dict)
assert deserialized == message
|
