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import asyncio
import unittest
import unittest.mock
from websockets.asyncio.compatibility import aiter, anext
from websockets.asyncio.messages import *
from websockets.asyncio.messages import SimpleQueue
from websockets.exceptions import ConcurrencyError
from websockets.frames import OP_BINARY, OP_CONT, OP_TEXT, Frame
from .utils import alist
class SimpleQueueTests(unittest.IsolatedAsyncioTestCase):
async def asyncSetUp(self):
self.queue = SimpleQueue()
async def test_len(self):
"""__len__ returns queue length."""
self.assertEqual(len(self.queue), 0)
self.queue.put(42)
self.assertEqual(len(self.queue), 1)
await self.queue.get()
self.assertEqual(len(self.queue), 0)
async def test_put_then_get(self):
"""get returns an item that is already put."""
self.queue.put(42)
item = await self.queue.get()
self.assertEqual(item, 42)
async def test_get_then_put(self):
"""get returns an item when it is put."""
getter_task = asyncio.create_task(self.queue.get())
await asyncio.sleep(0) # let the task start
self.queue.put(42)
item = await getter_task
self.assertEqual(item, 42)
async def test_reset(self):
"""reset sets the content of the queue."""
self.queue.reset([42])
item = await self.queue.get()
self.assertEqual(item, 42)
async def test_abort(self):
"""abort throws an exception in get."""
getter_task = asyncio.create_task(self.queue.get())
await asyncio.sleep(0) # let the task start
self.queue.abort()
with self.assertRaises(EOFError):
await getter_task
class AssemblerTests(unittest.IsolatedAsyncioTestCase):
async def asyncSetUp(self):
self.pause = unittest.mock.Mock()
self.resume = unittest.mock.Mock()
self.assembler = Assembler(high=2, low=1, pause=self.pause, resume=self.resume)
# Test get
async def test_get_text_message_already_received(self):
"""get returns a text message that is already received."""
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
message = await self.assembler.get()
self.assertEqual(message, "café")
async def test_get_binary_message_already_received(self):
"""get returns a binary message that is already received."""
self.assembler.put(Frame(OP_BINARY, b"tea"))
message = await self.assembler.get()
self.assertEqual(message, b"tea")
async def test_get_text_message_not_received_yet(self):
"""get returns a text message when it is received."""
getter_task = asyncio.create_task(self.assembler.get())
await asyncio.sleep(0) # let the event loop start getter_task
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
message = await getter_task
self.assertEqual(message, "café")
async def test_get_binary_message_not_received_yet(self):
"""get returns a binary message when it is received."""
getter_task = asyncio.create_task(self.assembler.get())
await asyncio.sleep(0) # let the event loop start getter_task
self.assembler.put(Frame(OP_BINARY, b"tea"))
message = await getter_task
self.assertEqual(message, b"tea")
async def test_get_fragmented_text_message_already_received(self):
"""get reassembles a fragmented a text message that is already received."""
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assembler.put(Frame(OP_CONT, b"\xa9"))
message = await self.assembler.get()
self.assertEqual(message, "café")
async def test_get_fragmented_binary_message_already_received(self):
"""get reassembles a fragmented binary message that is already received."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
message = await self.assembler.get()
self.assertEqual(message, b"tea")
async def test_get_fragmented_text_message_not_received_yet(self):
"""get reassembles a fragmented text message when it is received."""
getter_task = asyncio.create_task(self.assembler.get())
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assembler.put(Frame(OP_CONT, b"\xa9"))
message = await getter_task
self.assertEqual(message, "café")
async def test_get_fragmented_binary_message_not_received_yet(self):
"""get reassembles a fragmented binary message when it is received."""
getter_task = asyncio.create_task(self.assembler.get())
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
message = await getter_task
self.assertEqual(message, b"tea")
async def test_get_fragmented_text_message_being_received(self):
"""get reassembles a fragmented text message that is partially received."""
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
getter_task = asyncio.create_task(self.assembler.get())
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assembler.put(Frame(OP_CONT, b"\xa9"))
message = await getter_task
self.assertEqual(message, "café")
async def test_get_fragmented_binary_message_being_received(self):
"""get reassembles a fragmented binary message that is partially received."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
getter_task = asyncio.create_task(self.assembler.get())
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
message = await getter_task
self.assertEqual(message, b"tea")
async def test_get_encoded_text_message(self):
"""get returns a text message without UTF-8 decoding."""
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
message = await self.assembler.get(decode=False)
self.assertEqual(message, b"caf\xc3\xa9")
async def test_get_decoded_binary_message(self):
"""get returns a binary message with UTF-8 decoding."""
self.assembler.put(Frame(OP_BINARY, b"tea"))
message = await self.assembler.get(decode=True)
self.assertEqual(message, "tea")
async def test_get_resumes_reading(self):
"""get resumes reading when queue goes below the low-water mark."""
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
self.assembler.put(Frame(OP_TEXT, b"more caf\xc3\xa9"))
self.assembler.put(Frame(OP_TEXT, b"water"))
# queue is above the low-water mark
await self.assembler.get()
self.resume.assert_not_called()
# queue is at the low-water mark
await self.assembler.get()
self.resume.assert_called_once_with()
# queue is below the low-water mark
await self.assembler.get()
self.resume.assert_called_once_with()
async def test_get_does_not_resume_reading(self):
"""get does not resume reading when the low-water mark is unset."""
self.assembler.low = None
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
self.assembler.put(Frame(OP_TEXT, b"more caf\xc3\xa9"))
self.assembler.put(Frame(OP_TEXT, b"water"))
await self.assembler.get()
await self.assembler.get()
await self.assembler.get()
self.resume.assert_not_called()
async def test_cancel_get_before_first_frame(self):
"""get can be canceled safely before reading the first frame."""
getter_task = asyncio.create_task(self.assembler.get())
await asyncio.sleep(0) # let the event loop start getter_task
getter_task.cancel()
with self.assertRaises(asyncio.CancelledError):
await getter_task
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
message = await self.assembler.get()
self.assertEqual(message, "café")
async def test_cancel_get_after_first_frame(self):
"""get can be canceled safely after reading the first frame."""
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
getter_task = asyncio.create_task(self.assembler.get())
await asyncio.sleep(0) # let the event loop start getter_task
getter_task.cancel()
with self.assertRaises(asyncio.CancelledError):
await getter_task
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assembler.put(Frame(OP_CONT, b"\xa9"))
message = await self.assembler.get()
self.assertEqual(message, "café")
# Test get_iter
async def test_get_iter_text_message_already_received(self):
"""get_iter yields a text message that is already received."""
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
fragments = await alist(self.assembler.get_iter())
self.assertEqual(fragments, ["café"])
async def test_get_iter_binary_message_already_received(self):
"""get_iter yields a binary message that is already received."""
self.assembler.put(Frame(OP_BINARY, b"tea"))
fragments = await alist(self.assembler.get_iter())
self.assertEqual(fragments, [b"tea"])
async def test_get_iter_text_message_not_received_yet(self):
"""get_iter yields a text message when it is received."""
getter_task = asyncio.create_task(alist(self.assembler.get_iter()))
await asyncio.sleep(0) # let the event loop start getter_task
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
fragments = await getter_task
self.assertEqual(fragments, ["café"])
async def test_get_iter_binary_message_not_received_yet(self):
"""get_iter yields a binary message when it is received."""
getter_task = asyncio.create_task(alist(self.assembler.get_iter()))
await asyncio.sleep(0) # let the event loop start getter_task
self.assembler.put(Frame(OP_BINARY, b"tea"))
fragments = await getter_task
self.assertEqual(fragments, [b"tea"])
async def test_get_iter_fragmented_text_message_already_received(self):
"""get_iter yields a fragmented text message that is already received."""
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assembler.put(Frame(OP_CONT, b"\xa9"))
fragments = await alist(self.assembler.get_iter())
self.assertEqual(fragments, ["ca", "f", "é"])
async def test_get_iter_fragmented_binary_message_already_received(self):
"""get_iter yields a fragmented binary message that is already received."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
fragments = await alist(self.assembler.get_iter())
self.assertEqual(fragments, [b"t", b"e", b"a"])
async def test_get_iter_fragmented_text_message_not_received_yet(self):
"""get_iter yields a fragmented text message when it is received."""
iterator = aiter(self.assembler.get_iter())
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
self.assertEqual(await anext(iterator), "ca")
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assertEqual(await anext(iterator), "f")
self.assembler.put(Frame(OP_CONT, b"\xa9"))
self.assertEqual(await anext(iterator), "é")
async def test_get_iter_fragmented_binary_message_not_received_yet(self):
"""get_iter yields a fragmented binary message when it is received."""
iterator = aiter(self.assembler.get_iter())
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assertEqual(await anext(iterator), b"t")
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assertEqual(await anext(iterator), b"e")
self.assembler.put(Frame(OP_CONT, b"a"))
self.assertEqual(await anext(iterator), b"a")
async def test_get_iter_fragmented_text_message_being_received(self):
"""get_iter yields a fragmented text message that is partially received."""
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
iterator = aiter(self.assembler.get_iter())
self.assertEqual(await anext(iterator), "ca")
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assertEqual(await anext(iterator), "f")
self.assembler.put(Frame(OP_CONT, b"\xa9"))
self.assertEqual(await anext(iterator), "é")
async def test_get_iter_fragmented_binary_message_being_received(self):
"""get_iter yields a fragmented binary message that is partially received."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
iterator = aiter(self.assembler.get_iter())
self.assertEqual(await anext(iterator), b"t")
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assertEqual(await anext(iterator), b"e")
self.assembler.put(Frame(OP_CONT, b"a"))
self.assertEqual(await anext(iterator), b"a")
async def test_get_iter_encoded_text_message(self):
"""get_iter yields a text message without UTF-8 decoding."""
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assembler.put(Frame(OP_CONT, b"\xa9"))
fragments = await alist(self.assembler.get_iter(decode=False))
self.assertEqual(fragments, [b"ca", b"f\xc3", b"\xa9"])
async def test_get_iter_decoded_binary_message(self):
"""get_iter yields a binary message with UTF-8 decoding."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
fragments = await alist(self.assembler.get_iter(decode=True))
self.assertEqual(fragments, ["t", "e", "a"])
async def test_get_iter_resumes_reading(self):
"""get_iter resumes reading when queue goes below the low-water mark."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
iterator = aiter(self.assembler.get_iter())
# queue is above the low-water mark
await anext(iterator)
self.resume.assert_not_called()
# queue is at the low-water mark
await anext(iterator)
self.resume.assert_called_once_with()
# queue is below the low-water mark
await anext(iterator)
self.resume.assert_called_once_with()
async def test_get_iter_does_not_resume_reading(self):
"""get_iter does not resume reading when the low-water mark is unset."""
self.assembler.low = None
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
iterator = aiter(self.assembler.get_iter())
await anext(iterator)
await anext(iterator)
await anext(iterator)
self.resume.assert_not_called()
async def test_cancel_get_iter_before_first_frame(self):
"""get_iter can be canceled safely before reading the first frame."""
getter_task = asyncio.create_task(alist(self.assembler.get_iter()))
await asyncio.sleep(0) # let the event loop start getter_task
getter_task.cancel()
with self.assertRaises(asyncio.CancelledError):
await getter_task
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
fragments = await alist(self.assembler.get_iter())
self.assertEqual(fragments, ["café"])
async def test_cancel_get_iter_after_first_frame(self):
"""get_iter cannot be canceled after reading the first frame."""
self.assembler.put(Frame(OP_TEXT, b"ca", fin=False))
getter_task = asyncio.create_task(alist(self.assembler.get_iter()))
await asyncio.sleep(0) # let the event loop start getter_task
getter_task.cancel()
with self.assertRaises(asyncio.CancelledError):
await getter_task
self.assembler.put(Frame(OP_CONT, b"f\xc3", fin=False))
self.assembler.put(Frame(OP_CONT, b"\xa9"))
with self.assertRaises(ConcurrencyError):
await alist(self.assembler.get_iter())
# Test put
async def test_put_pauses_reading(self):
"""put pauses reading when queue goes above the high-water mark."""
# queue is below the high-water mark
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.pause.assert_not_called()
# queue is at the high-water mark
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.pause.assert_called_once_with()
# queue is above the high-water mark
self.assembler.put(Frame(OP_CONT, b"a"))
self.pause.assert_called_once_with()
async def test_put_does_not_pause_reading(self):
"""put does not pause reading when the high-water mark is unset."""
self.assembler.high = None
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
self.pause.assert_not_called()
# Test termination
async def test_get_fails_when_interrupted_by_close(self):
"""get raises EOFError when close is called."""
asyncio.get_running_loop().call_soon(self.assembler.close)
with self.assertRaises(EOFError):
await self.assembler.get()
async def test_get_iter_fails_when_interrupted_by_close(self):
"""get_iter raises EOFError when close is called."""
asyncio.get_running_loop().call_soon(self.assembler.close)
with self.assertRaises(EOFError):
async for _ in self.assembler.get_iter():
self.fail("no fragment expected")
async def test_get_fails_after_close(self):
"""get raises EOFError after close is called."""
self.assembler.close()
with self.assertRaises(EOFError):
await self.assembler.get()
async def test_get_iter_fails_after_close(self):
"""get_iter raises EOFError after close is called."""
self.assembler.close()
with self.assertRaises(EOFError):
async for _ in self.assembler.get_iter():
self.fail("no fragment expected")
async def test_get_queued_message_after_close(self):
"""get returns a message after close is called."""
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
self.assembler.close()
message = await self.assembler.get()
self.assertEqual(message, "café")
async def test_get_iter_queued_message_after_close(self):
"""get_iter yields a message after close is called."""
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
self.assembler.close()
fragments = await alist(self.assembler.get_iter())
self.assertEqual(fragments, ["café"])
async def test_get_queued_fragmented_message_after_close(self):
"""get reassembles a fragmented message after close is called."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
self.assembler.close()
self.assembler.close()
message = await self.assembler.get()
self.assertEqual(message, b"tea")
async def test_get_iter_queued_fragmented_message_after_close(self):
"""get_iter yields a fragmented message after close is called."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.put(Frame(OP_CONT, b"a"))
self.assembler.close()
fragments = await alist(self.assembler.get_iter())
self.assertEqual(fragments, [b"t", b"e", b"a"])
async def test_get_partially_queued_fragmented_message_after_close(self):
"""get raises EOF on a partial fragmented message after close is called."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.close()
with self.assertRaises(EOFError):
await self.assembler.get()
async def test_get_iter_partially_queued_fragmented_message_after_close(self):
"""get_iter yields a partial fragmented message after close is called."""
self.assembler.put(Frame(OP_BINARY, b"t", fin=False))
self.assembler.put(Frame(OP_CONT, b"e", fin=False))
self.assembler.close()
fragments = []
with self.assertRaises(EOFError):
async for fragment in self.assembler.get_iter():
fragments.append(fragment)
self.assertEqual(fragments, [b"t", b"e"])
async def test_put_fails_after_close(self):
"""put raises EOFError after close is called."""
self.assembler.close()
with self.assertRaises(EOFError):
self.assembler.put(Frame(OP_TEXT, b"caf\xc3\xa9"))
async def test_close_is_idempotent(self):
"""close can be called multiple times safely."""
self.assembler.close()
self.assembler.close()
# Test (non-)concurrency
async def test_get_fails_when_get_is_running(self):
"""get cannot be called concurrently."""
asyncio.create_task(self.assembler.get())
await asyncio.sleep(0)
with self.assertRaises(ConcurrencyError):
await self.assembler.get()
self.assembler.put(Frame(OP_TEXT, b"")) # let task terminate
async def test_get_fails_when_get_iter_is_running(self):
"""get cannot be called concurrently with get_iter."""
asyncio.create_task(alist(self.assembler.get_iter()))
await asyncio.sleep(0)
with self.assertRaises(ConcurrencyError):
await self.assembler.get()
self.assembler.put(Frame(OP_TEXT, b"")) # let task terminate
async def test_get_iter_fails_when_get_is_running(self):
"""get_iter cannot be called concurrently with get."""
asyncio.create_task(self.assembler.get())
await asyncio.sleep(0)
with self.assertRaises(ConcurrencyError):
await alist(self.assembler.get_iter())
self.assembler.put(Frame(OP_TEXT, b"")) # let task terminate
async def test_get_iter_fails_when_get_iter_is_running(self):
"""get_iter cannot be called concurrently."""
asyncio.create_task(alist(self.assembler.get_iter()))
await asyncio.sleep(0)
with self.assertRaises(ConcurrencyError):
await alist(self.assembler.get_iter())
self.assembler.put(Frame(OP_TEXT, b"")) # let task terminate
# Test setting limits
async def test_set_high_water_mark(self):
"""high sets the high-water and low-water marks."""
assembler = Assembler(high=10)
self.assertEqual(assembler.high, 10)
self.assertEqual(assembler.low, 2)
async def test_set_low_water_mark(self):
"""low sets the low-water and high-water marks."""
assembler = Assembler(low=5)
self.assertEqual(assembler.low, 5)
self.assertEqual(assembler.high, 20)
async def test_set_high_and_low_water_marks(self):
"""high and low set the high-water and low-water marks."""
assembler = Assembler(high=10, low=5)
self.assertEqual(assembler.high, 10)
self.assertEqual(assembler.low, 5)
async def test_unset_high_and_low_water_marks(self):
"""High-water and low-water marks are unset."""
assembler = Assembler()
self.assertEqual(assembler.high, None)
self.assertEqual(assembler.low, None)
async def test_set_invalid_high_water_mark(self):
"""high must be a non-negative integer."""
with self.assertRaises(ValueError):
Assembler(high=-1)
async def test_set_invalid_low_water_mark(self):
"""low must be higher than high."""
with self.assertRaises(ValueError):
Assembler(low=10, high=5)
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