pytest-asyncio | Asyncio support for pytest | Reactive Programming library
kandi X-RAY | pytest-asyncio Summary
kandi X-RAY | pytest-asyncio Summary
Asyncio support for pytest
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pytest-asyncio Key Features
pytest-asyncio Examples and Code Snippets
Lines of Code : 16License : Strong Copyleft (CC BY-SA 4.0)
Copyimport asyncio
import pytest
pytest_plugins = ('pytest_asyncio',)
@pytest.mark.asyncio
async def test_simple():
await asyncio.sleep(0.5)
collected 1 item
test_async.py::test_simple PASSED
<
Lines of Code : 17License : Strong Copyleft (CC BY-SA 4.0)CopyFirebaseDatabase.getInstance().setPersistenceEnabled(true);
String source = querySnapshot.getMetadata().isFromCache() ? "Local Cache" : "Firebase Servers”
Map data = new HashMap<>(); page = await browser.new_page()
import asyncio
import pytest
async def watch(stream):
while True:
lines = await stream.read(2 ** 16)
if not lines or lines == "":
break
lines = lines.decode().strip().split("\n") #note the use of # test_mre.py
@pytest.mark.asyncio
async def test_1():
client = get_cached_client() # FIRST CALL - Create Channel & Stub object in here
await client.get_data(arg1='foo')
@pytest.mark.asyncio
async def test_2(): # FAIL(or STimport mock
import grpc
import pytest
from tokenize_pb2 import MyMessage
from my_implementation import MyService
async def my_message_generator(messages):
for message in messages:
yield message
@pytest.mark.asyncio
async def@pytest.mark.asyncio
async def test_init_patch_runtime_error() -> None:
nest_asyncio.apply()
with patch("webrtc.logger") as mock_logger:
with patch("webrtc.get_running_loop", side_effect=RuntimeError()):
Web# This alows for packages to be accessed from the **globally** installed Python (NOT the tox env).
sitepackages = True
# This alows for commands to be used available outside tox. Typically used for non-python callables.
whitelist_externaimport asynctest
from asynctest.mock import patch
class TestClass(asynctest.TestCase):
@patch("requests.get", side_effect=mocked_get)
async def test_method(self, mock_requests):
resp = []
async for data in method1@pytest.fixture(scope='module')
def event_loop():
loop = asyncio.new_event_loop()
yield loop
loop.close()
Community Discussions
Trending Discussions on pytest-asyncio
QUESTION
@pytest.fixture
def d_service():
c = DService()
return c
# @pytest.mark.asyncio # tried it too
async def test_get_file_list(d_service):
files = await d_service.get_file_list('')
print(files)
ANSWER
Answered 2021-Nov-18 at 08:02This works for me, please try:
QUESTION
I'm using google.cloud.firestore with Async Client, and I want to add timeout setting for adding documents but I can't somehow...
Versions- Python: 3.9.7
- google-cloud-firestore: ">=2.1.0"
- API framework: fastapi: "^0.70.0"
- pytest: "^6.2.5"
- pytest-asyncio: "^0.16.0"
When I run this code without setting firebase server turning on:
ANSWER
Answered 2021-Nov-16 at 06:12First, you should check if there are any networking settings blocking connections. 503 means the library is unable to make a connection with the backend API. Now coming to Firestore timeout values, there is no way to adjust that. The timeout requests defaults to a system specified value as per this.
Write operations never time out, and they never fail due to loss of network. You should not think of Firestore reads and writes as typical input and output operations. Data written to Firestore is eventually synchronized, which will happen whenever it's possible to do so.
Unlike in Firebase Realtime database where to enable offline persistence, you have to do the following :
QUESTION
I'm making Client service that interacts with other MicroService Server.
By using gRPC Channel, this client get some data from server. The connection is used frequently, and participants are fixed, so I reuse gRPC Channel and Stub to reduce channel creating cost.
This service performs well for each requests, and each test functions alone at one time. However in multiple testing, I found that only one test succeed, and the other would be failed with TimeOutError(gRPC status -DEADLINE_EXCEEDED) or stopped.
Interestingly, this problem is solved when I remove channel caching(@lru_cache), or add pytest event_loop fixture override for session(or module) scope. I found the second method in this question/answer.
Why this happens? What makes my test stop or fail? I guess that it is related with event loop, but don't know details.
Minimal Reproducible Example(MRE) ...ANSWER
Answered 2021-Aug-27 at 13:35I found that this problem derives from the implementation of gRPC Channel and pytest event loop fixture.
lru_cache returns cached result if the same function is called. This, 'same' means that if function is called by same input(arguments). Asked caching function gets no argument, so if you call the function, you will get exactly same result with previous call except the first call. so, your grpc channel in test codes are all the same channel exactly.
QUESTION
I am attempting to run Flask in an async manner on python 3.6.10, but keep getting:
...ANSWER
Answered 2021-May-30 at 06:49Flask.async_to_sync() in Flask 2.0 requires ContextVar. Minimal Python requirement for async support in Flask is 3.7 (when contextvars are introduced) if you are not using Greenlet. If you're using Greenlet, it also depends on the Greenlet version.
QUESTION
I'm trying to test a click command that is async from pytest, but I am hitting the limits of my knowledge of asyncio (or approaching the problem with a wrong architecture)
On one side, I have a click command line, that creates a grpclib channel to hit a grpc api.
ANSWER
Answered 2021-May-16 at 23:01You are running your own event loop in the async_cmd decorator with this:
QUESTION
I'm trying out a new (beta) 1.4 sqlalchemy and encountered difficulty when trying to port "Joining a Session into an External Transaction (such as for test suite)" recipe using async API and pytest.
Firstly, I've tried converting unittest example of zzzeek to pytest, which works fine
ANSWER
Answered 2021-Jan-07 at 07:24It turned out to be a bug, reached out to the SA developers directly.
Note: there is API change, and one should use connection.begin_nested() in favor of session.begin_nested(), according to @zzzek:
The "legacy" pattern that you have above which uses "session.begin_nested()" to create the savepoint, this is not supported for the "future" style engine which asyncio uses. The new version uses the connection itself to recreate the savepoint inside the event.
QUESTION
here is the part of the files that are important for this question:
...ANSWER
Answered 2020-Jul-21 at 20:31My compliments on such an extensive report. Your issue lies probably in this weird setup you've got going on.
QUESTION
I have an async function that calls a streaming api. What is the best way to write unit test for this function? The api response has to be mocked.
I tried with aiounittest and used mock from unittest. But this calls the actual api instead of getting the mocked response. Also tried with pytest.mark.asyncio annotation, but this kept giving me the error - coroutine was never awaited. I have verified that pytest-asyncio has been installed.
I am using VS Code and Python 3.6.6
Here is the relevant code snippet:
...ANSWER
Answered 2020-Dec-10 at 17:47Use asynctest instead of aiounittest.
- Replace
unittest.TestCasewithasynctest.TestCase. - Replace
from unittest.mock import patchwithfrom asynctest.mock import patch. async for data in method1:should beasync for data in method1():.
QUESTION
I'm using dbus for IPC. In order to have exactly one bus throughout the livetime of my program I'm using a singleton here. For the sake of demonstration I'm connecting to NetworkManager but that could be exchanged. Furthermore, I'm using asyncio for the entire project.
This is a minimalistic working example of the module that will highlight the problem described below:
ANSWER
Answered 2020-Oct-15 at 21:16From looking at this, looks like you're using a global variable which connects to something. Persistent connections are bound to an event loop. So if you want to continue using a global variable, the scope of the event loop fixture needs to match the scope of this variable.
I would redefine the event loop fixture to be session scoped, and create a session scoped fixture, depending on the event loop fixture, to initialize this global variable (by just calling get_bus, I suppose). The second fixture is required to ensure proper initialization ordering - i.e. that the event loop is set up properly first.
Edit: The documentation of pytest-asyncio says that event loops by default are test function scoped. Thus, they are being recreated in for each test. This default behavior can be simply overridden:
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Install pytest-asyncio
You can use pytest-asyncio like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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