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import asyncio
import random
import async_timeout
import pytest
from asgiref.sync import async_to_sync
from channels_redis.pubsub import RedisPubSubChannelLayer
from channels_redis.utils import _close_redis
SENTINEL_MASTER = "sentinel"
SENTINEL_KWARGS = {"password": "channels_redis"}
TEST_HOSTS = [
{
"sentinels": [("localhost", 26379)],
"master_name": SENTINEL_MASTER,
"sentinel_kwargs": SENTINEL_KWARGS,
}
]
@pytest.fixture()
async def channel_layer():
"""
Channel layer fixture that flushes automatically.
"""
channel_layer = RedisPubSubChannelLayer(hosts=TEST_HOSTS)
yield channel_layer
async with async_timeout.timeout(1):
await channel_layer.flush()
@pytest.mark.asyncio
async def test_send_receive(channel_layer):
"""
Makes sure we can send a message to a normal channel then receive it.
"""
channel = await channel_layer.new_channel()
await channel_layer.send(channel, {"type": "test.message", "text": "Ahoy-hoy!"})
message = await channel_layer.receive(channel)
assert message["type"] == "test.message"
assert message["text"] == "Ahoy-hoy!"
def test_send_receive_sync(channel_layer):
event_loop = asyncio.new_event_loop()
_await = event_loop.run_until_complete
channel = _await(channel_layer.new_channel())
async_to_sync(channel_layer.send, force_new_loop=True)(
channel, {"type": "test.message", "text": "Ahoy-hoy!"}
)
message = _await(channel_layer.receive(channel))
assert message["type"] == "test.message"
assert message["text"] == "Ahoy-hoy!"
event_loop.close()
@pytest.mark.asyncio
async def test_multi_send_receive(channel_layer):
"""
Tests overlapping sends and receives, and ordering.
"""
channel = await channel_layer.new_channel()
await channel_layer.send(channel, {"type": "message.1"})
await channel_layer.send(channel, {"type": "message.2"})
await channel_layer.send(channel, {"type": "message.3"})
assert (await channel_layer.receive(channel))["type"] == "message.1"
assert (await channel_layer.receive(channel))["type"] == "message.2"
assert (await channel_layer.receive(channel))["type"] == "message.3"
def test_multi_send_receive_sync(channel_layer):
event_loop = asyncio.new_event_loop()
_await = event_loop.run_until_complete
channel = _await(channel_layer.new_channel())
send = async_to_sync(channel_layer.send)
send(channel, {"type": "message.1"})
send(channel, {"type": "message.2"})
send(channel, {"type": "message.3"})
assert _await(channel_layer.receive(channel))["type"] == "message.1"
assert _await(channel_layer.receive(channel))["type"] == "message.2"
assert _await(channel_layer.receive(channel))["type"] == "message.3"
event_loop.close()
@pytest.mark.asyncio
async def test_groups_basic(channel_layer):
"""
Tests basic group operation.
"""
channel_name1 = await channel_layer.new_channel(prefix="test-gr-chan-1")
channel_name2 = await channel_layer.new_channel(prefix="test-gr-chan-2")
channel_name3 = await channel_layer.new_channel(prefix="test-gr-chan-3")
await channel_layer.group_add("test-group", channel_name1)
await channel_layer.group_add("test-group", channel_name2)
await channel_layer.group_add("test-group", channel_name3)
await channel_layer.group_discard("test-group", channel_name2)
await channel_layer.group_send("test-group", {"type": "message.1"})
# Make sure we get the message on the two channels that were in
async with async_timeout.timeout(1):
assert (await channel_layer.receive(channel_name1))["type"] == "message.1"
assert (await channel_layer.receive(channel_name3))["type"] == "message.1"
# Make sure the removed channel did not get the message
with pytest.raises(asyncio.TimeoutError):
async with async_timeout.timeout(1):
await channel_layer.receive(channel_name2)
@pytest.mark.asyncio
async def test_groups_same_prefix(channel_layer):
"""
Tests group_send with multiple channels with same channel prefix
"""
channel_name1 = await channel_layer.new_channel(prefix="test-gr-chan")
channel_name2 = await channel_layer.new_channel(prefix="test-gr-chan")
channel_name3 = await channel_layer.new_channel(prefix="test-gr-chan")
await channel_layer.group_add("test-group", channel_name1)
await channel_layer.group_add("test-group", channel_name2)
await channel_layer.group_add("test-group", channel_name3)
await channel_layer.group_send("test-group", {"type": "message.1"})
# Make sure we get the message on the channels that were in
async with async_timeout.timeout(1):
assert (await channel_layer.receive(channel_name1))["type"] == "message.1"
assert (await channel_layer.receive(channel_name2))["type"] == "message.1"
assert (await channel_layer.receive(channel_name3))["type"] == "message.1"
@pytest.mark.asyncio
async def test_random_reset__channel_name(channel_layer):
"""
Makes sure resetting random seed does not make us reuse channel names.
"""
random.seed(1)
channel_name_1 = await channel_layer.new_channel()
random.seed(1)
channel_name_2 = await channel_layer.new_channel()
assert channel_name_1 != channel_name_2
@pytest.mark.asyncio
async def test_loop_instance_channel_layer_reference(channel_layer):
redis_pub_sub_loop_layer = channel_layer._get_layer()
assert redis_pub_sub_loop_layer.channel_layer == channel_layer
def test_serialize(channel_layer):
"""
Test default serialization method
"""
message = {"a": True, "b": None, "c": {"d": []}}
serialized = channel_layer.serialize(message)
assert isinstance(serialized, bytes)
assert serialized == b"\x83\xa1a\xc3\xa1b\xc0\xa1c\x81\xa1d\x90"
def test_deserialize(channel_layer):
"""
Test default deserialization method
"""
message = b"\x83\xa1a\xc3\xa1b\xc0\xa1c\x81\xa1d\x90"
deserialized = channel_layer.deserialize(message)
assert isinstance(deserialized, dict)
assert deserialized == {"a": True, "b": None, "c": {"d": []}}
def test_multi_event_loop_garbage_collection(channel_layer):
"""
Test loop closure layer flushing and garbage collection
"""
assert len(channel_layer._layers.values()) == 0
async_to_sync(test_send_receive)(channel_layer)
assert len(channel_layer._layers.values()) == 0
@pytest.mark.asyncio
async def test_receive_hang(channel_layer):
channel_name = await channel_layer.new_channel(prefix="test-channel")
with pytest.raises(asyncio.TimeoutError):
await asyncio.wait_for(channel_layer.receive(channel_name), timeout=1)
@pytest.mark.asyncio
async def test_auto_reconnect(channel_layer):
"""
Tests redis-py reconnect and resubscribe
"""
channel_name1 = await channel_layer.new_channel(prefix="test-gr-chan-1")
channel_name2 = await channel_layer.new_channel(prefix="test-gr-chan-2")
channel_name3 = await channel_layer.new_channel(prefix="test-gr-chan-3")
await channel_layer.group_add("test-group", channel_name1)
await channel_layer.group_add("test-group", channel_name2)
await _close_redis(channel_layer._shards[0]._redis)
await channel_layer.group_add("test-group", channel_name3)
await channel_layer.group_discard("test-group", channel_name2)
await _close_redis(channel_layer._shards[0]._redis)
await asyncio.sleep(1)
await channel_layer.group_send("test-group", {"type": "message.1"})
# Make sure we get the message on the two channels that were in
async with async_timeout.timeout(5):
assert (await channel_layer.receive(channel_name1))["type"] == "message.1"
assert (await channel_layer.receive(channel_name3))["type"] == "message.1"
# Make sure the removed channel did not get the message
with pytest.raises(asyncio.TimeoutError):
async with async_timeout.timeout(1):
await channel_layer.receive(channel_name2)
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