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test_rpc.py
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test_rpc.py
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from .rpc import (format_request, Client)
from .transports import Transport
from .protocol import (Request, Notification)
from .types import Settings
from .logging import set_exception_logging
import unittest
import json
try:
from typing import Any, List, Dict, Tuple, Callable, Optional
assert Any and List and Dict and Tuple and Callable and Optional
except ImportError:
pass
class MockSettings(Settings):
def __init__(self):
Settings.__init__(self)
self.log_payloads = False
self.show_view_status = True
def return_empty_dict_result(message):
return '{"id": 1, "result": {}}'
def return_null_result(message):
return '{"id": 1, "result": null}'
def return_error(message):
return '{"id": 1, "error": {"message": "oops"}}'
def raise_error(message):
raise Exception(message)
def notify_pong(message):
notification = {
"method": "pong"
}
return json.dumps(notification)
class MockTransport(Transport):
def __init__(self, responder=None):
self.messages = [] # type: List[str]
self.responder = responder
def start(self, on_receive, on_closed):
self.on_receive = on_receive
self.on_closed = on_closed
self.has_started = True
def send(self, message):
self.messages.append(message)
if self.responder:
self.on_receive(self.responder(message))
def receive(self, message):
self.on_receive(message)
def close(self):
self.on_closed()
class FormatTests(unittest.TestCase):
def test_converts_payload_to_string(self):
self.assertEqual("Content-Length: 2\r\n\r\n{}", format_request(dict()))
class ClientTest(unittest.TestCase):
def test_can_create_client(self):
transport = MockTransport()
client = Client(transport, dict())
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
def test_client_request_response(self):
transport = MockTransport(return_empty_dict_result)
settings = MockSettings()
client = Client(transport, settings)
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
req = Request.initialize(dict())
responses = []
client.send_request(req, lambda resp: responses.append(resp))
self.assertGreater(len(responses), 0)
# Make sure the response handler dict does not grow.
self.assertEqual(len(client._response_handlers), 0)
def test_client_request_with_none_response(self):
transport = MockTransport(return_null_result)
settings = MockSettings()
client = Client(transport, settings)
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
req = Request.shutdown()
responses = []
errors = []
client.send_request(req, lambda resp: responses.append(resp), lambda err: errors.append(err))
self.assertEqual(len(responses), 1)
self.assertEqual(len(errors), 0)
def test_client_notification(self):
transport = MockTransport(notify_pong)
settings = MockSettings()
client = Client(transport, settings)
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
pongs = []
client.on_notification(
"pong",
lambda params: pongs.append(params))
req = Notification("ping", dict())
client.send_notification(req)
self.assertGreater(len(transport.messages), 0)
self.assertEqual(len(pongs), 1)
def test_server_request(self):
# TODO: LSP never responds to eg workspace/applyEdit.
transport = MockTransport()
settings = MockSettings()
client = Client(transport, settings)
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
pings = []
client.on_request(
"ping",
lambda params: pings.append(params))
transport.receive('{ "id": 1, "method": "ping"}')
self.assertEqual(len(pings), 1)
def test_error_response_handler(self):
transport = MockTransport(return_error)
settings = MockSettings()
client = Client(transport, settings)
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
req = Request.initialize(dict())
errors = []
responses = []
client.send_request(req, lambda resp: responses.append(resp), lambda err: errors.append(err))
self.assertEqual(len(responses), 0)
self.assertGreater(len(errors), 0)
self.assertEqual(len(client._response_handlers), 0)
def test_error_display_handler(self):
transport = MockTransport(return_error)
settings = MockSettings()
client = Client(transport, settings)
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
req = Request.initialize(dict())
errors = []
client.set_error_display_handler(lambda err: errors.append(err))
responses = []
client.send_request(req, lambda resp: responses.append(resp))
self.assertEqual(len(responses), 0)
self.assertGreater(len(errors), 0)
self.assertEqual(len(client._response_handlers), 0)
def test_handles_transport_closed_unexpectedly(self):
set_exception_logging(False)
transport = MockTransport(raise_error)
settings = MockSettings()
client = Client(transport, settings)
errors = []
client.set_transport_failure_handler(lambda: errors.append(""))
self.assertTrue(transport.has_started)
transport.close()
self.assertGreater(len(errors), 0)
def test_survives_handler_error(self):
set_exception_logging(False)
transport = MockTransport(return_empty_dict_result)
settings = MockSettings()
client = Client(transport, settings)
self.assertIsNotNone(client)
self.assertTrue(transport.has_started)
req = Request.initialize(dict())
client.send_request(req, lambda resp: raise_error('handler failed'))
# exception would fail test if not handled in client
self.assertEqual(len(client._response_handlers), 0)