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"""Tests for selectors.py."""
import unittest
from unittest import mock
from asyncio import selectors
class FakeSelector(selectors._BaseSelectorImpl):
"""Trivial non-abstract subclass of BaseSelector."""
def select(self, timeout=None):
raise NotImplementedError
class _SelectorMappingTests(unittest.TestCase):
def test_len(self):
s = FakeSelector()
map = selectors._SelectorMapping(s)
self.assertTrue(map.__len__() == 0)
f = mock.Mock()
f.fileno.return_value = 10
s.register(f, selectors.EVENT_READ, None)
self.assertTrue(len(map) == 1)
def test_getitem(self):
s = FakeSelector()
map = selectors._SelectorMapping(s)
f = mock.Mock()
f.fileno.return_value = 10
s.register(f, selectors.EVENT_READ, None)
attended = selectors.SelectorKey(f, 10, selectors.EVENT_READ, None)
self.assertEqual(attended, map.__getitem__(f))
def test_getitem_key_error(self):
s = FakeSelector()
map = selectors._SelectorMapping(s)
self.assertTrue(len(map) == 0)
f = mock.Mock()
f.fileno.return_value = 10
s.register(f, selectors.EVENT_READ, None)
self.assertRaises(KeyError, map.__getitem__, 5)
def test_iter(self):
s = FakeSelector()
map = selectors._SelectorMapping(s)
self.assertTrue(len(map) == 0)
f = mock.Mock()
f.fileno.return_value = 5
s.register(f, selectors.EVENT_READ, None)
counter = 0
for fileno in map.__iter__():
self.assertEqual(5, fileno)
counter += 1
for idx in map:
self.assertEqual(f, map[idx].fileobj)
self.assertEqual(1, counter)
class BaseSelectorTests(unittest.TestCase):
def test_fileobj_to_fd(self):
self.assertEqual(10, selectors._fileobj_to_fd(10))
f = mock.Mock()
f.fileno.return_value = 10
self.assertEqual(10, selectors._fileobj_to_fd(f))
f.fileno.side_effect = AttributeError
self.assertRaises(ValueError, selectors._fileobj_to_fd, f)
f.fileno.return_value = -1
self.assertRaises(ValueError, selectors._fileobj_to_fd, f)
def test_selector_key_repr(self):
key = selectors.SelectorKey(10, 10, selectors.EVENT_READ, None)
self.assertEqual(
"SelectorKey(fileobj=10, fd=10, events=1, data=None)", repr(key))
def test_register(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
s = FakeSelector()
key = s.register(fobj, selectors.EVENT_READ)
self.assertIsInstance(key, selectors.SelectorKey)
self.assertEqual(key.fd, 10)
self.assertIs(key, s._fd_to_key[10])
def test_register_unknown_event(self):
s = FakeSelector()
self.assertRaises(ValueError, s.register, mock.Mock(), 999999)
def test_register_already_registered(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
s = FakeSelector()
s.register(fobj, selectors.EVENT_READ)
self.assertRaises(KeyError, s.register, fobj, selectors.EVENT_READ)
def test_unregister(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
s = FakeSelector()
s.register(fobj, selectors.EVENT_READ)
s.unregister(fobj)
self.assertFalse(s._fd_to_key)
def test_unregister_unknown(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
s = FakeSelector()
self.assertRaises(KeyError, s.unregister, fobj)
def test_modify_unknown(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
s = FakeSelector()
self.assertRaises(KeyError, s.modify, fobj, 1)
def test_modify(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
s = FakeSelector()
key = s.register(fobj, selectors.EVENT_READ)
key2 = s.modify(fobj, selectors.EVENT_WRITE)
self.assertNotEqual(key.events, key2.events)
self.assertEqual(
selectors.SelectorKey(fobj, 10, selectors.EVENT_WRITE, None),
s.get_key(fobj))
def test_modify_data(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
d1 = object()
d2 = object()
s = FakeSelector()
key = s.register(fobj, selectors.EVENT_READ, d1)
key2 = s.modify(fobj, selectors.EVENT_READ, d2)
self.assertEqual(key.events, key2.events)
self.assertNotEqual(key.data, key2.data)
self.assertEqual(
selectors.SelectorKey(fobj, 10, selectors.EVENT_READ, d2),
s.get_key(fobj))
def test_modify_data_use_a_shortcut(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
d1 = object()
d2 = object()
s = FakeSelector()
s.register(fobj, selectors.EVENT_READ, d1)
s.unregister = mock.Mock()
s.register = mock.Mock()
s.modify(fobj, selectors.EVENT_READ, d2)
self.assertFalse(s.unregister.called)
self.assertFalse(s.register.called)
def test_modify_same(self):
fobj = mock.Mock()
fobj.fileno.return_value = 10
data = object()
s = FakeSelector()
key = s.register(fobj, selectors.EVENT_READ, data)
key2 = s.modify(fobj, selectors.EVENT_READ, data)
self.assertIs(key, key2)
def test_select(self):
s = FakeSelector()
self.assertRaises(NotImplementedError, s.select)
def test_close(self):
s = FakeSelector()
s.register(1, selectors.EVENT_READ)
s.close()
self.assertFalse(s._fd_to_key)
def test_context_manager(self):
s = FakeSelector()
with s as sel:
sel.register(1, selectors.EVENT_READ)
self.assertFalse(s._fd_to_key)
def test_key_from_fd(self):
s = FakeSelector()
key = s.register(1, selectors.EVENT_READ)
self.assertIs(key, s._key_from_fd(1))
self.assertIsNone(s._key_from_fd(10))
if hasattr(selectors.DefaultSelector, 'fileno'):
def test_fileno(self):
self.assertIsInstance(selectors.DefaultSelector().fileno(), int)
if __name__ == '__main__':
unittest.main()
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