mirror of https://github.com/python/cpython
300 lines
8.8 KiB
Python
300 lines
8.8 KiB
Python
import threading
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from textwrap import dedent
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import unittest
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import time
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from test.support import import_helper
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# Raise SkipTest if subinterpreters not supported.
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_queues = import_helper.import_module('_xxinterpqueues')
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from test.support import interpreters
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from test.support.interpreters import queues
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from .utils import _run_output, TestBase
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class TestBase(TestBase):
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def tearDown(self):
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for qid in _queues.list_all():
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try:
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_queues.destroy(qid)
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except Exception:
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pass
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class QueueTests(TestBase):
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def test_create(self):
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with self.subTest('vanilla'):
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queue = queues.create()
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self.assertEqual(queue.maxsize, 0)
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with self.subTest('small maxsize'):
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queue = queues.create(3)
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self.assertEqual(queue.maxsize, 3)
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with self.subTest('big maxsize'):
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queue = queues.create(100)
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self.assertEqual(queue.maxsize, 100)
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with self.subTest('no maxsize'):
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queue = queues.create(0)
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self.assertEqual(queue.maxsize, 0)
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with self.subTest('negative maxsize'):
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queue = queues.create(-10)
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self.assertEqual(queue.maxsize, -10)
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with self.subTest('bad maxsize'):
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with self.assertRaises(TypeError):
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queues.create('1')
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def test_shareable(self):
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queue1 = queues.create()
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interp = interpreters.create()
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interp.exec_sync(dedent(f"""
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from test.support.interpreters import queues
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queue1 = queues.Queue({queue1.id})
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"""));
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with self.subTest('same interpreter'):
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queue2 = queues.create()
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queue1.put(queue2)
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queue3 = queue1.get()
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self.assertIs(queue3, queue2)
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with self.subTest('from current interpreter'):
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queue4 = queues.create()
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queue1.put(queue4)
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out = _run_output(interp, dedent("""
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queue4 = queue1.get()
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print(queue4.id)
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"""))
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qid = int(out)
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self.assertEqual(qid, queue4.id)
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with self.subTest('from subinterpreter'):
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out = _run_output(interp, dedent("""
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queue5 = queues.create()
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queue1.put(queue5)
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print(queue5.id)
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"""))
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qid = int(out)
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queue5 = queue1.get()
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self.assertEqual(queue5.id, qid)
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def test_id_type(self):
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queue = queues.create()
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self.assertIsInstance(queue.id, int)
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def test_custom_id(self):
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with self.assertRaises(queues.QueueNotFoundError):
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queues.Queue(1_000_000)
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def test_id_readonly(self):
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queue = queues.create()
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with self.assertRaises(AttributeError):
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queue.id = 1_000_000
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def test_maxsize_readonly(self):
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queue = queues.create(10)
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with self.assertRaises(AttributeError):
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queue.maxsize = 1_000_000
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def test_hashable(self):
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queue = queues.create()
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expected = hash(queue.id)
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actual = hash(queue)
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self.assertEqual(actual, expected)
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def test_equality(self):
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queue1 = queues.create()
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queue2 = queues.create()
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self.assertEqual(queue1, queue1)
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self.assertNotEqual(queue1, queue2)
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class TestQueueOps(TestBase):
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def test_empty(self):
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queue = queues.create()
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before = queue.empty()
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queue.put(None)
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during = queue.empty()
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queue.get()
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after = queue.empty()
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self.assertIs(before, True)
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self.assertIs(during, False)
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self.assertIs(after, True)
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def test_full(self):
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expected = [False, False, False, True, False, False, False]
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actual = []
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queue = queues.create(3)
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for _ in range(3):
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actual.append(queue.full())
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queue.put(None)
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actual.append(queue.full())
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for _ in range(3):
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queue.get()
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actual.append(queue.full())
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self.assertEqual(actual, expected)
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def test_qsize(self):
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expected = [0, 1, 2, 3, 2, 3, 2, 1, 0, 1, 0]
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actual = []
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queue = queues.create()
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for _ in range(3):
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actual.append(queue.qsize())
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queue.put(None)
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actual.append(queue.qsize())
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queue.get()
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actual.append(queue.qsize())
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queue.put(None)
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actual.append(queue.qsize())
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for _ in range(3):
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queue.get()
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actual.append(queue.qsize())
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queue.put(None)
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actual.append(queue.qsize())
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queue.get()
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actual.append(queue.qsize())
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self.assertEqual(actual, expected)
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def test_put_get_main(self):
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expected = list(range(20))
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queue = queues.create()
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for i in range(20):
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queue.put(i)
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actual = [queue.get() for _ in range(20)]
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self.assertEqual(actual, expected)
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def test_put_timeout(self):
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queue = queues.create(2)
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queue.put(None)
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queue.put(None)
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with self.assertRaises(queues.QueueFull):
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queue.put(None, timeout=0.1)
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queue.get()
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queue.put(None)
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def test_put_nowait(self):
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queue = queues.create(2)
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queue.put_nowait(None)
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queue.put_nowait(None)
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with self.assertRaises(queues.QueueFull):
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queue.put_nowait(None)
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queue.get()
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queue.put_nowait(None)
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def test_get_timeout(self):
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queue = queues.create()
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with self.assertRaises(queues.QueueEmpty):
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queue.get(timeout=0.1)
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def test_get_nowait(self):
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queue = queues.create()
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with self.assertRaises(queues.QueueEmpty):
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queue.get_nowait()
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def test_put_get_same_interpreter(self):
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interp = interpreters.create()
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interp.exec_sync(dedent("""
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from test.support.interpreters import queues
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queue = queues.create()
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orig = b'spam'
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queue.put(orig)
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obj = queue.get()
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assert obj == orig, 'expected: obj == orig'
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assert obj is not orig, 'expected: obj is not orig'
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"""))
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def test_put_get_different_interpreters(self):
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interp = interpreters.create()
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queue1 = queues.create()
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queue2 = queues.create()
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self.assertEqual(len(queues.list_all()), 2)
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obj1 = b'spam'
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queue1.put(obj1)
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out = _run_output(
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interp,
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dedent(f"""
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from test.support.interpreters import queues
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queue1 = queues.Queue({queue1.id})
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queue2 = queues.Queue({queue2.id})
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assert queue1.qsize() == 1, 'expected: queue1.qsize() == 1'
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obj = queue1.get()
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assert queue1.qsize() == 0, 'expected: queue1.qsize() == 0'
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assert obj == b'spam', 'expected: obj == obj1'
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# When going to another interpreter we get a copy.
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assert id(obj) != {id(obj1)}, 'expected: obj is not obj1'
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obj2 = b'eggs'
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print(id(obj2))
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assert queue2.qsize() == 0, 'expected: queue2.qsize() == 0'
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queue2.put(obj2)
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assert queue2.qsize() == 1, 'expected: queue2.qsize() == 1'
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"""))
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self.assertEqual(len(queues.list_all()), 2)
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self.assertEqual(queue1.qsize(), 0)
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self.assertEqual(queue2.qsize(), 1)
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obj2 = queue2.get()
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self.assertEqual(obj2, b'eggs')
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self.assertNotEqual(id(obj2), int(out))
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def test_put_cleared_with_subinterpreter(self):
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interp = interpreters.create()
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queue = queues.create()
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out = _run_output(
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interp,
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dedent(f"""
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from test.support.interpreters import queues
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queue = queues.Queue({queue.id})
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obj1 = b'spam'
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obj2 = b'eggs'
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queue.put(obj1)
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queue.put(obj2)
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"""))
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self.assertEqual(queue.qsize(), 2)
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obj1 = queue.get()
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self.assertEqual(obj1, b'spam')
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self.assertEqual(queue.qsize(), 1)
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del interp
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self.assertEqual(queue.qsize(), 0)
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def test_put_get_different_threads(self):
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queue1 = queues.create()
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queue2 = queues.create()
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def f():
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while True:
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try:
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obj = queue1.get(timeout=0.1)
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break
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except queues.QueueEmpty:
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continue
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queue2.put(obj)
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t = threading.Thread(target=f)
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t.start()
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orig = b'spam'
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queue1.put(orig)
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obj = queue2.get()
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t.join()
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self.assertEqual(obj, orig)
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self.assertIsNot(obj, orig)
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if __name__ == '__main__':
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# Test needs to be a package, so we can do relative imports.
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unittest.main()
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