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test_websockets.py
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/
test_websockets.py
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import anyio
import pytest
from starlette import status
from starlette.testclient import TestClient
from starlette.websockets import WebSocket, WebSocketDisconnect
def test_websocket_url():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
await websocket.send_json({"url": str(websocket.url)})
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/123?a=abc") as websocket:
data = websocket.receive_json()
assert data == {"url": "ws://testserver/123?a=abc"}
def test_websocket_binary_json():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
message = await websocket.receive_json(mode="binary")
await websocket.send_json(message, mode="binary")
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/123?a=abc") as websocket:
websocket.send_json({"test": "data"}, mode="binary")
data = websocket.receive_json(mode="binary")
assert data == {"test": "data"}
def test_websocket_query_params():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
query_params = dict(websocket.query_params)
await websocket.accept()
await websocket.send_json({"params": query_params})
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/?a=abc&b=456") as websocket:
data = websocket.receive_json()
assert data == {"params": {"a": "abc", "b": "456"}}
def test_websocket_headers():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
headers = dict(websocket.headers)
await websocket.accept()
await websocket.send_json({"headers": headers})
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
expected_headers = {
"accept": "*/*",
"accept-encoding": "gzip, deflate",
"connection": "upgrade",
"host": "testserver",
"user-agent": "testclient",
"sec-websocket-key": "testserver==",
"sec-websocket-version": "13",
}
data = websocket.receive_json()
assert data == {"headers": expected_headers}
def test_websocket_port():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
await websocket.send_json({"port": websocket.url.port})
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("ws://example.com:123/123?a=abc") as websocket:
data = websocket.receive_json()
assert data == {"port": 123}
def test_websocket_send_and_receive_text():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
data = await websocket.receive_text()
await websocket.send_text("Message was: " + data)
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.send_text("Hello, world!")
data = websocket.receive_text()
assert data == "Message was: Hello, world!"
def test_websocket_send_and_receive_bytes():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
data = await websocket.receive_bytes()
await websocket.send_bytes(b"Message was: " + data)
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.send_bytes(b"Hello, world!")
data = websocket.receive_bytes()
assert data == b"Message was: Hello, world!"
def test_websocket_send_and_receive_json():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
data = await websocket.receive_json()
await websocket.send_json({"message": data})
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.send_json({"hello": "world"})
data = websocket.receive_json()
assert data == {"message": {"hello": "world"}}
def test_websocket_iter_text():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
async for data in websocket.iter_text():
await websocket.send_text("Message was: " + data)
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.send_text("Hello, world!")
data = websocket.receive_text()
assert data == "Message was: Hello, world!"
def test_websocket_iter_bytes():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
async for data in websocket.iter_bytes():
await websocket.send_bytes(b"Message was: " + data)
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.send_bytes(b"Hello, world!")
data = websocket.receive_bytes()
assert data == b"Message was: Hello, world!"
def test_websocket_iter_json():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
async for data in websocket.iter_json():
await websocket.send_json({"message": data})
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.send_json({"hello": "world"})
data = websocket.receive_json()
assert data == {"message": {"hello": "world"}}
def test_websocket_concurrency_pattern():
def app(scope):
stream_send, stream_receive = anyio.create_memory_object_stream()
async def reader(websocket):
async with stream_send:
async for data in websocket.iter_json():
await stream_send.send(data)
async def writer(websocket):
async with stream_receive:
async for message in stream_receive:
await websocket.send_json(message)
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
async with anyio.create_task_group() as task_group:
task_group.start_soon(reader, websocket)
await writer(websocket)
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.send_json({"hello": "world"})
data = websocket.receive_json()
assert data == {"hello": "world"}
def test_client_close():
close_code = None
def app(scope):
async def asgi(receive, send):
nonlocal close_code
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
try:
await websocket.receive_text()
except WebSocketDisconnect as exc:
close_code = exc.code
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
websocket.close(code=status.WS_1001_GOING_AWAY)
assert close_code == status.WS_1001_GOING_AWAY
def test_application_close():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
await websocket.close(status.WS_1001_GOING_AWAY)
return asgi
client = TestClient(app)
with client.websocket_connect("/") as websocket:
with pytest.raises(WebSocketDisconnect) as exc:
websocket.receive_text()
assert exc.value.code == status.WS_1001_GOING_AWAY
def test_rejected_connection():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.close(status.WS_1001_GOING_AWAY)
return asgi
client = TestClient(app)
with pytest.raises(WebSocketDisconnect) as exc:
with client.websocket_connect("/"):
pass # pragma: nocover
assert exc.value.code == status.WS_1001_GOING_AWAY
def test_subprotocol():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
assert websocket["subprotocols"] == ["soap", "wamp"]
await websocket.accept(subprotocol="wamp")
await websocket.close()
return asgi
client = TestClient(app)
with client.websocket_connect("/", subprotocols=["soap", "wamp"]) as websocket:
assert websocket.accepted_subprotocol == "wamp"
def test_websocket_exception():
def app(scope):
async def asgi(receive, send):
assert False
return asgi
client = TestClient(app)
with pytest.raises(AssertionError):
with client.websocket_connect("/123?a=abc"):
pass # pragma: nocover
def test_duplicate_close():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
await websocket.close()
await websocket.close()
return asgi
client = TestClient(app)
with pytest.raises(RuntimeError):
with client.websocket_connect("/"):
pass # pragma: nocover
def test_duplicate_disconnect():
def app(scope):
async def asgi(receive, send):
websocket = WebSocket(scope, receive=receive, send=send)
await websocket.accept()
message = await websocket.receive()
assert message["type"] == "websocket.disconnect"
message = await websocket.receive()
return asgi
client = TestClient(app)
with pytest.raises(RuntimeError):
with client.websocket_connect("/") as websocket:
websocket.close()
def test_websocket_scope_interface():
"""
A WebSocket can be instantiated with a scope, and presents a `Mapping`
interface.
"""
async def mock_receive():
pass # pragma: no cover
async def mock_send(message):
pass # pragma: no cover
websocket = WebSocket(
{"type": "websocket", "path": "/abc/", "headers": []},
receive=mock_receive,
send=mock_send,
)
assert websocket["type"] == "websocket"
assert dict(websocket) == {"type": "websocket", "path": "/abc/", "headers": []}
assert len(websocket) == 3
# check __eq__ and __hash__
assert websocket != WebSocket(
{"type": "websocket", "path": "/abc/", "headers": []},
receive=mock_receive,
send=mock_send,
)
assert websocket == websocket
assert websocket in {websocket}
assert {websocket} == {websocket}