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import unittest
import asyncio
from iterators import AsyncIteratorPipe
class TestTimeoutIterator(unittest.TestCase):
def test_normal_iteration(self):
async def _(self):
it = AsyncIteratorPipe()
await it.put(1)
await it.put(2)
await it.put(3)
await it.close() # stop iteration
self.assertEqual(await it.__anext__(), 1)
self.assertEqual(await it.__anext__(), 2)
self.assertEqual(await it.__anext__(), 3)
with self.assertRaises(StopAsyncIteration):
await it.__anext__()
asyncio.get_event_loop().run_until_complete(_(self))
def test_multiple_next_after_exception(self):
async def _(self):
it = AsyncIteratorPipe()
await it.put(1)
await it.put(2)
await it.put(3)
await it.close() # stop iteration
self.assertEqual(await it.__anext__(), 1)
self.assertEqual(await it.__anext__(), 2)
self.assertEqual(await it.__anext__(), 3)
with self.assertRaises(StopAsyncIteration):
await it.__anext__()
with self.assertRaises(StopAsyncIteration):
await it.__anext__()
asyncio.get_event_loop().run_until_complete(_(self))
def test_multiple_close(self):
async def _(self):
it = AsyncIteratorPipe()
await it.put(1)
await it.put(2)
await it.put(3)
await it.close() # stop iteration
await it.close() # stop iteration
await it.close() # stop iteration
self.assertEqual(await it.__anext__(), 1)
self.assertEqual(await it.__anext__(), 2)
self.assertEqual(await it.__anext__(), 3)
with self.assertRaises(StopAsyncIteration):
await it.__anext__()
asyncio.get_event_loop().run_until_complete(_(self))
def test_put_after_close(self):
async def _(self):
it = AsyncIteratorPipe()
self.assertTrue(await it.put(1))
await it.close() # stop iteration
self.assertFalse(await it.put(2))
await it.close() # stop iteration
self.assertFalse(await it.put(3))
await it.close() # stop iteration
self.assertEqual(await it.__anext__(), 1)
with self.assertRaises(StopAsyncIteration):
await it.__anext__()
asyncio.get_event_loop().run_until_complete(_(self))
def test_normal_iteration_via_for_loop(self):
async def _(self):
it = AsyncIteratorPipe()
await it.put(1)
await it.put(2)
await it.put(3)
await it.close()
iter_results = []
async for x in it:
iter_results.append(x)
self.assertEqual(iter_results, [1, 2, 3])
iter_results = []
async for x in it:
iter_results.append(x)
self.assertEqual(iter_results, [])
asyncio.get_event_loop().run_until_complete(_(self))
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