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Initial checkin of asyncio package (== Tulip, == PEP 3156).
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Guido van Rossum
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commit
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44 changed files with 16016 additions and 0 deletions
361
Lib/test/test_asyncio/test_streams.py
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361
Lib/test/test_asyncio/test_streams.py
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"""Tests for streams.py."""
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import gc
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import ssl
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import unittest
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import unittest.mock
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from asyncio import events
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from asyncio import streams
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from asyncio import tasks
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from asyncio import test_utils
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class StreamReaderTests(unittest.TestCase):
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DATA = b'line1\nline2\nline3\n'
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def setUp(self):
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self.loop = events.new_event_loop()
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events.set_event_loop(None)
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def tearDown(self):
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# just in case if we have transport close callbacks
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test_utils.run_briefly(self.loop)
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self.loop.close()
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gc.collect()
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@unittest.mock.patch('asyncio.streams.events')
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def test_ctor_global_loop(self, m_events):
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stream = streams.StreamReader()
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self.assertIs(stream.loop, m_events.get_event_loop.return_value)
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def test_open_connection(self):
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with test_utils.run_test_server() as httpd:
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f = streams.open_connection(*httpd.address, loop=self.loop)
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reader, writer = self.loop.run_until_complete(f)
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writer.write(b'GET / HTTP/1.0\r\n\r\n')
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f = reader.readline()
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data = self.loop.run_until_complete(f)
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self.assertEqual(data, b'HTTP/1.0 200 OK\r\n')
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f = reader.read()
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data = self.loop.run_until_complete(f)
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self.assertTrue(data.endswith(b'\r\n\r\nTest message'))
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writer.close()
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@unittest.skipIf(ssl is None, 'No ssl module')
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def test_open_connection_no_loop_ssl(self):
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with test_utils.run_test_server(use_ssl=True) as httpd:
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try:
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events.set_event_loop(self.loop)
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f = streams.open_connection(*httpd.address,
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ssl=test_utils.dummy_ssl_context())
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reader, writer = self.loop.run_until_complete(f)
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finally:
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events.set_event_loop(None)
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writer.write(b'GET / HTTP/1.0\r\n\r\n')
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f = reader.read()
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data = self.loop.run_until_complete(f)
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self.assertTrue(data.endswith(b'\r\n\r\nTest message'))
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writer.close()
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def test_open_connection_error(self):
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with test_utils.run_test_server() as httpd:
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f = streams.open_connection(*httpd.address, loop=self.loop)
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reader, writer = self.loop.run_until_complete(f)
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writer._protocol.connection_lost(ZeroDivisionError())
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f = reader.read()
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with self.assertRaises(ZeroDivisionError):
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self.loop.run_until_complete(f)
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writer.close()
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test_utils.run_briefly(self.loop)
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def test_feed_empty_data(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(b'')
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self.assertEqual(0, stream.byte_count)
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def test_feed_data_byte_count(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(self.DATA)
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self.assertEqual(len(self.DATA), stream.byte_count)
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def test_read_zero(self):
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# Read zero bytes.
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(self.DATA)
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data = self.loop.run_until_complete(stream.read(0))
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self.assertEqual(b'', data)
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self.assertEqual(len(self.DATA), stream.byte_count)
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def test_read(self):
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# Read bytes.
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stream = streams.StreamReader(loop=self.loop)
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read_task = tasks.Task(stream.read(30), loop=self.loop)
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def cb():
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stream.feed_data(self.DATA)
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self.loop.call_soon(cb)
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data = self.loop.run_until_complete(read_task)
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self.assertEqual(self.DATA, data)
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self.assertFalse(stream.byte_count)
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def test_read_line_breaks(self):
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# Read bytes without line breaks.
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(b'line1')
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stream.feed_data(b'line2')
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data = self.loop.run_until_complete(stream.read(5))
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self.assertEqual(b'line1', data)
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self.assertEqual(5, stream.byte_count)
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def test_read_eof(self):
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# Read bytes, stop at eof.
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stream = streams.StreamReader(loop=self.loop)
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read_task = tasks.Task(stream.read(1024), loop=self.loop)
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def cb():
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stream.feed_eof()
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self.loop.call_soon(cb)
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data = self.loop.run_until_complete(read_task)
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self.assertEqual(b'', data)
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self.assertFalse(stream.byte_count)
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def test_read_until_eof(self):
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# Read all bytes until eof.
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stream = streams.StreamReader(loop=self.loop)
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read_task = tasks.Task(stream.read(-1), loop=self.loop)
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def cb():
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stream.feed_data(b'chunk1\n')
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stream.feed_data(b'chunk2')
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stream.feed_eof()
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self.loop.call_soon(cb)
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data = self.loop.run_until_complete(read_task)
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self.assertEqual(b'chunk1\nchunk2', data)
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self.assertFalse(stream.byte_count)
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def test_read_exception(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(b'line\n')
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data = self.loop.run_until_complete(stream.read(2))
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self.assertEqual(b'li', data)
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stream.set_exception(ValueError())
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self.assertRaises(
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ValueError, self.loop.run_until_complete, stream.read(2))
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def test_readline(self):
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# Read one line.
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(b'chunk1 ')
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read_task = tasks.Task(stream.readline(), loop=self.loop)
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def cb():
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stream.feed_data(b'chunk2 ')
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stream.feed_data(b'chunk3 ')
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stream.feed_data(b'\n chunk4')
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self.loop.call_soon(cb)
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line = self.loop.run_until_complete(read_task)
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self.assertEqual(b'chunk1 chunk2 chunk3 \n', line)
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self.assertEqual(len(b'\n chunk4')-1, stream.byte_count)
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def test_readline_limit_with_existing_data(self):
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stream = streams.StreamReader(3, loop=self.loop)
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stream.feed_data(b'li')
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stream.feed_data(b'ne1\nline2\n')
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self.assertRaises(
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ValueError, self.loop.run_until_complete, stream.readline())
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self.assertEqual([b'line2\n'], list(stream.buffer))
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stream = streams.StreamReader(3, loop=self.loop)
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stream.feed_data(b'li')
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stream.feed_data(b'ne1')
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stream.feed_data(b'li')
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self.assertRaises(
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ValueError, self.loop.run_until_complete, stream.readline())
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self.assertEqual([b'li'], list(stream.buffer))
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self.assertEqual(2, stream.byte_count)
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def test_readline_limit(self):
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stream = streams.StreamReader(7, loop=self.loop)
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def cb():
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stream.feed_data(b'chunk1')
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stream.feed_data(b'chunk2')
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stream.feed_data(b'chunk3\n')
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stream.feed_eof()
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self.loop.call_soon(cb)
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self.assertRaises(
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ValueError, self.loop.run_until_complete, stream.readline())
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self.assertEqual([b'chunk3\n'], list(stream.buffer))
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self.assertEqual(7, stream.byte_count)
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def test_readline_line_byte_count(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(self.DATA[:6])
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stream.feed_data(self.DATA[6:])
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line = self.loop.run_until_complete(stream.readline())
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self.assertEqual(b'line1\n', line)
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self.assertEqual(len(self.DATA) - len(b'line1\n'), stream.byte_count)
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def test_readline_eof(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(b'some data')
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stream.feed_eof()
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line = self.loop.run_until_complete(stream.readline())
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self.assertEqual(b'some data', line)
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def test_readline_empty_eof(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_eof()
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line = self.loop.run_until_complete(stream.readline())
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self.assertEqual(b'', line)
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def test_readline_read_byte_count(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(self.DATA)
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self.loop.run_until_complete(stream.readline())
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data = self.loop.run_until_complete(stream.read(7))
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self.assertEqual(b'line2\nl', data)
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self.assertEqual(
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len(self.DATA) - len(b'line1\n') - len(b'line2\nl'),
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stream.byte_count)
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def test_readline_exception(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(b'line\n')
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data = self.loop.run_until_complete(stream.readline())
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self.assertEqual(b'line\n', data)
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stream.set_exception(ValueError())
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self.assertRaises(
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ValueError, self.loop.run_until_complete, stream.readline())
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def test_readexactly_zero_or_less(self):
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# Read exact number of bytes (zero or less).
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(self.DATA)
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data = self.loop.run_until_complete(stream.readexactly(0))
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self.assertEqual(b'', data)
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self.assertEqual(len(self.DATA), stream.byte_count)
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data = self.loop.run_until_complete(stream.readexactly(-1))
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self.assertEqual(b'', data)
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self.assertEqual(len(self.DATA), stream.byte_count)
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def test_readexactly(self):
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# Read exact number of bytes.
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stream = streams.StreamReader(loop=self.loop)
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n = 2 * len(self.DATA)
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read_task = tasks.Task(stream.readexactly(n), loop=self.loop)
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def cb():
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stream.feed_data(self.DATA)
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stream.feed_data(self.DATA)
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stream.feed_data(self.DATA)
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self.loop.call_soon(cb)
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data = self.loop.run_until_complete(read_task)
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self.assertEqual(self.DATA + self.DATA, data)
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self.assertEqual(len(self.DATA), stream.byte_count)
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def test_readexactly_eof(self):
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# Read exact number of bytes (eof).
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stream = streams.StreamReader(loop=self.loop)
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n = 2 * len(self.DATA)
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read_task = tasks.Task(stream.readexactly(n), loop=self.loop)
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def cb():
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stream.feed_data(self.DATA)
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stream.feed_eof()
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self.loop.call_soon(cb)
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data = self.loop.run_until_complete(read_task)
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self.assertEqual(self.DATA, data)
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self.assertFalse(stream.byte_count)
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def test_readexactly_exception(self):
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stream = streams.StreamReader(loop=self.loop)
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stream.feed_data(b'line\n')
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data = self.loop.run_until_complete(stream.readexactly(2))
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self.assertEqual(b'li', data)
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stream.set_exception(ValueError())
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self.assertRaises(
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ValueError, self.loop.run_until_complete, stream.readexactly(2))
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def test_exception(self):
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stream = streams.StreamReader(loop=self.loop)
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self.assertIsNone(stream.exception())
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exc = ValueError()
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stream.set_exception(exc)
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self.assertIs(stream.exception(), exc)
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def test_exception_waiter(self):
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stream = streams.StreamReader(loop=self.loop)
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@tasks.coroutine
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def set_err():
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stream.set_exception(ValueError())
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@tasks.coroutine
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def readline():
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yield from stream.readline()
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t1 = tasks.Task(stream.readline(), loop=self.loop)
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t2 = tasks.Task(set_err(), loop=self.loop)
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self.loop.run_until_complete(tasks.wait([t1, t2], loop=self.loop))
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self.assertRaises(ValueError, t1.result)
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def test_exception_cancel(self):
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stream = streams.StreamReader(loop=self.loop)
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@tasks.coroutine
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def read_a_line():
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yield from stream.readline()
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t = tasks.Task(read_a_line(), loop=self.loop)
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test_utils.run_briefly(self.loop)
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t.cancel()
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test_utils.run_briefly(self.loop)
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# The following line fails if set_exception() isn't careful.
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stream.set_exception(RuntimeError('message'))
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test_utils.run_briefly(self.loop)
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self.assertIs(stream.waiter, None)
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if __name__ == '__main__':
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unittest.main()
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