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import asyncio
import pytest
import async_timeout
from grpclib.const import Status
from grpclib.testing import ChannelFor
from grpclib.exceptions import GRPCError
from grpclib.health.check import ServiceCheck, ServiceStatus
from grpclib.health.service import Health
from grpclib.health.v1.health_pb2 import HealthCheckRequest, HealthCheckResponse
from grpclib.health.v1.health_grpc import HealthStub
class Check:
__current_status__ = None
async def __call__(self):
return self.__current_status__
SERVICE_NAME = 'namespace.ServiceName'
class Service:
async def Foo(self, stream):
raise NotImplementedError
def __mapping__(self):
return {'/{}/Foo'.format(SERVICE_NAME): self.Foo}
@pytest.mark.asyncio
async def test_check_unknown_service():
svc = Service()
health = Health({svc: []})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
with pytest.raises(GRPCError) as err:
await stub.Check(HealthCheckRequest(service='Unknown'))
assert err.value.status == Status.NOT_FOUND
@pytest.mark.asyncio
async def test_check_zero_checks():
svc = Service()
health = Health({svc: []})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
response = await stub.Check(HealthCheckRequest(service=SERVICE_NAME))
assert response == HealthCheckResponse(
status=HealthCheckResponse.SERVING,
)
@pytest.mark.asyncio
@pytest.mark.parametrize('v1, v2, status', [
(None, None, HealthCheckResponse.UNKNOWN),
(True, False, HealthCheckResponse.NOT_SERVING),
(False, True, HealthCheckResponse.NOT_SERVING),
(True, True, HealthCheckResponse.SERVING)
])
async def test_check_service_check(loop, v1, v2, status):
svc = Service()
c1 = Check()
c2 = Check()
health = Health({svc: [
ServiceCheck(c1, check_ttl=0),
ServiceCheck(c2, check_ttl=0),
]})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
c1.__current_status__ = v1
c2.__current_status__ = v2
response = await stub.Check(HealthCheckRequest(service=SERVICE_NAME))
assert response == HealthCheckResponse(status=status)
@pytest.mark.asyncio
@pytest.mark.parametrize('v1, v2, status', [
(None, None, HealthCheckResponse.UNKNOWN),
(True, False, HealthCheckResponse.NOT_SERVING),
(False, True, HealthCheckResponse.NOT_SERVING),
(True, True, HealthCheckResponse.SERVING)
])
async def test_check_service_status(v1, v2, status):
svc = Service()
s1 = ServiceStatus()
s2 = ServiceStatus()
health = Health({svc: [s1, s2]})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
s1.set(v1)
s2.set(v2)
response = await stub.Check(HealthCheckRequest(service=SERVICE_NAME))
assert response == HealthCheckResponse(status=status)
@pytest.mark.asyncio
async def test_watch_unknown_service():
svc = Service()
health = Health({svc: []})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
async with stub.Watch.open() as stream:
await stream.send_message(HealthCheckRequest(service='Unknown'),
end=True)
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.SERVICE_UNKNOWN,
)
try:
async with async_timeout.timeout(0.01):
assert not await stream.recv_message()
except asyncio.TimeoutError:
pass
await stream.cancel()
@pytest.mark.asyncio
async def test_watch_zero_checks():
svc = Service()
health = Health({svc: []})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
async with stub.Watch.open() as stream:
await stream.send_message(HealthCheckRequest(service=SERVICE_NAME),
end=True)
response = await stream.recv_message()
assert response == HealthCheckResponse(
status=HealthCheckResponse.SERVING,
)
try:
async with async_timeout.timeout(0.01):
assert not await stream.recv_message()
except asyncio.TimeoutError:
pass
await stream.cancel()
@pytest.mark.asyncio
async def test_watch_service_check():
svc = Service()
c1 = Check()
c2 = Check()
health = Health({svc: [
ServiceCheck(c1, check_ttl=0.001),
ServiceCheck(c2, check_ttl=0.001),
]})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
async with stub.Watch.open() as stream:
await stream.send_message(HealthCheckRequest(service=SERVICE_NAME),
end=True)
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.UNKNOWN,
)
# check that there are no unnecessary messages
try:
async with async_timeout.timeout(0.01):
assert not await stream.recv_message()
except asyncio.TimeoutError:
pass
c1.__current_status__ = True
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.NOT_SERVING,
)
c2.__current_status__ = True
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.SERVING,
)
c1.__current_status__ = False
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.NOT_SERVING,
)
c1.__current_status__ = True
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.SERVING,
)
await stream.cancel()
@pytest.mark.asyncio
async def test_watch_service_status():
svc = Service()
s1 = ServiceStatus()
s2 = ServiceStatus()
health = Health({svc: [s1, s2]})
async with ChannelFor([svc, health]) as channel:
stub = HealthStub(channel)
async with stub.Watch.open() as stream:
await stream.send_message(HealthCheckRequest(service=SERVICE_NAME),
end=True)
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.UNKNOWN,
)
s1.set(True)
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.NOT_SERVING,
)
s2.set(True)
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.SERVING,
)
s1.set(False)
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.NOT_SERVING,
)
s1.set(True)
assert await stream.recv_message() == HealthCheckResponse(
status=HealthCheckResponse.SERVING,
)
# check that there are no unnecessary messages if status isn't
# changed
s1.set(True)
try:
async with async_timeout.timeout(0.01):
assert not await stream.recv_message()
except asyncio.TimeoutError:
pass
await stream.cancel()
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