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581ee3618c
annotate text signatures in docstrings, resulting in fewer false positives. "self" parameters are also explicitly marked, allowing inspect.Signature() to authoritatively detect (and skip) said parameters. Issue #20326: Argument Clinic now generates separate checksums for the input and output sections of the block, allowing external tools to verify that the input has not changed (and thus the output is not out-of-date).
459 lines
18 KiB
Python
459 lines
18 KiB
Python
# Run the _testcapi module tests (tests for the Python/C API): by defn,
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# these are all functions _testcapi exports whose name begins with 'test_'.
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import os
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import pickle
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import random
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import subprocess
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import sys
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import time
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import unittest
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from test import support
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from test.support import MISSING_C_DOCSTRINGS
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try:
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import _posixsubprocess
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except ImportError:
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_posixsubprocess = None
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try:
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import threading
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except ImportError:
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threading = None
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import _testcapi
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def testfunction(self):
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"""some doc"""
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return self
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class InstanceMethod:
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id = _testcapi.instancemethod(id)
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testfunction = _testcapi.instancemethod(testfunction)
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class CAPITest(unittest.TestCase):
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def test_instancemethod(self):
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inst = InstanceMethod()
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self.assertEqual(id(inst), inst.id())
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self.assertTrue(inst.testfunction() is inst)
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self.assertEqual(inst.testfunction.__doc__, testfunction.__doc__)
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self.assertEqual(InstanceMethod.testfunction.__doc__, testfunction.__doc__)
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InstanceMethod.testfunction.attribute = "test"
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self.assertEqual(testfunction.attribute, "test")
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self.assertRaises(AttributeError, setattr, inst.testfunction, "attribute", "test")
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@unittest.skipUnless(threading, 'Threading required for this test.')
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def test_no_FatalError_infinite_loop(self):
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with support.SuppressCrashReport():
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p = subprocess.Popen([sys.executable, "-c",
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'import _testcapi;'
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'_testcapi.crash_no_current_thread()'],
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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(out, err) = p.communicate()
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self.assertEqual(out, b'')
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# This used to cause an infinite loop.
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self.assertTrue(err.rstrip().startswith(
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b'Fatal Python error:'
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b' PyThreadState_Get: no current thread'))
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def test_memoryview_from_NULL_pointer(self):
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self.assertRaises(ValueError, _testcapi.make_memoryview_from_NULL_pointer)
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def test_exc_info(self):
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raised_exception = ValueError("5")
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new_exc = TypeError("TEST")
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try:
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raise raised_exception
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except ValueError as e:
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tb = e.__traceback__
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orig_sys_exc_info = sys.exc_info()
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orig_exc_info = _testcapi.set_exc_info(new_exc.__class__, new_exc, None)
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new_sys_exc_info = sys.exc_info()
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new_exc_info = _testcapi.set_exc_info(*orig_exc_info)
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reset_sys_exc_info = sys.exc_info()
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self.assertEqual(orig_exc_info[1], e)
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self.assertSequenceEqual(orig_exc_info, (raised_exception.__class__, raised_exception, tb))
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self.assertSequenceEqual(orig_sys_exc_info, orig_exc_info)
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self.assertSequenceEqual(reset_sys_exc_info, orig_exc_info)
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self.assertSequenceEqual(new_exc_info, (new_exc.__class__, new_exc, None))
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self.assertSequenceEqual(new_sys_exc_info, new_exc_info)
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else:
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self.assertTrue(False)
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@unittest.skipUnless(_posixsubprocess, '_posixsubprocess required for this test.')
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def test_seq_bytes_to_charp_array(self):
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# Issue #15732: crash in _PySequence_BytesToCharpArray()
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class Z(object):
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def __len__(self):
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return 1
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self.assertRaises(TypeError, _posixsubprocess.fork_exec,
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1,Z(),3,[1, 2],5,6,7,8,9,10,11,12,13,14,15,16,17)
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# Issue #15736: overflow in _PySequence_BytesToCharpArray()
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class Z(object):
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def __len__(self):
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return sys.maxsize
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def __getitem__(self, i):
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return b'x'
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self.assertRaises(MemoryError, _posixsubprocess.fork_exec,
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1,Z(),3,[1, 2],5,6,7,8,9,10,11,12,13,14,15,16,17)
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@unittest.skipUnless(_posixsubprocess, '_posixsubprocess required for this test.')
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def test_subprocess_fork_exec(self):
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class Z(object):
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def __len__(self):
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return 1
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# Issue #15738: crash in subprocess_fork_exec()
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self.assertRaises(TypeError, _posixsubprocess.fork_exec,
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Z(),[b'1'],3,[1, 2],5,6,7,8,9,10,11,12,13,14,15,16,17)
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@unittest.skipIf(MISSING_C_DOCSTRINGS,
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"Signature information for builtins requires docstrings")
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def test_docstring_signature_parsing(self):
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self.assertEqual(_testcapi.no_docstring.__doc__, None)
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self.assertEqual(_testcapi.no_docstring.__text_signature__, None)
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self.assertEqual(_testcapi.docstring_empty.__doc__, "")
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self.assertEqual(_testcapi.docstring_empty.__text_signature__, None)
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self.assertEqual(_testcapi.docstring_no_signature.__doc__,
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"This docstring has no signature.")
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self.assertEqual(_testcapi.docstring_no_signature.__text_signature__, None)
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self.assertEqual(_testcapi.docstring_with_invalid_signature.__doc__,
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"sig= (module, boo)\n"
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"\n"
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"This docstring has an invalid signature."
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)
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self.assertEqual(_testcapi.docstring_with_invalid_signature.__text_signature__, None)
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self.assertEqual(_testcapi.docstring_with_signature.__doc__,
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"This docstring has a valid signature.")
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self.assertEqual(_testcapi.docstring_with_signature.__text_signature__, "(module, sig)")
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self.assertEqual(_testcapi.docstring_with_signature_and_extra_newlines.__doc__,
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"This docstring has a valid signature and some extra newlines.")
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self.assertEqual(_testcapi.docstring_with_signature_and_extra_newlines.__text_signature__,
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"(module, parameter)")
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@unittest.skipUnless(threading, 'Threading required for this test.')
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class TestPendingCalls(unittest.TestCase):
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def pendingcalls_submit(self, l, n):
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def callback():
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#this function can be interrupted by thread switching so let's
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#use an atomic operation
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l.append(None)
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for i in range(n):
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time.sleep(random.random()*0.02) #0.01 secs on average
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#try submitting callback until successful.
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#rely on regular interrupt to flush queue if we are
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#unsuccessful.
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while True:
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if _testcapi._pending_threadfunc(callback):
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break;
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def pendingcalls_wait(self, l, n, context = None):
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#now, stick around until l[0] has grown to 10
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count = 0;
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while len(l) != n:
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#this busy loop is where we expect to be interrupted to
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#run our callbacks. Note that callbacks are only run on the
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#main thread
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if False and support.verbose:
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print("(%i)"%(len(l),),)
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for i in range(1000):
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a = i*i
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if context and not context.event.is_set():
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continue
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count += 1
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self.assertTrue(count < 10000,
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"timeout waiting for %i callbacks, got %i"%(n, len(l)))
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if False and support.verbose:
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print("(%i)"%(len(l),))
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def test_pendingcalls_threaded(self):
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#do every callback on a separate thread
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n = 32 #total callbacks
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threads = []
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class foo(object):pass
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context = foo()
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context.l = []
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context.n = 2 #submits per thread
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context.nThreads = n // context.n
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context.nFinished = 0
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context.lock = threading.Lock()
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context.event = threading.Event()
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for i in range(context.nThreads):
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t = threading.Thread(target=self.pendingcalls_thread, args = (context,))
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t.start()
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threads.append(t)
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self.pendingcalls_wait(context.l, n, context)
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for t in threads:
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t.join()
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def pendingcalls_thread(self, context):
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try:
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self.pendingcalls_submit(context.l, context.n)
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finally:
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with context.lock:
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context.nFinished += 1
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nFinished = context.nFinished
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if False and support.verbose:
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print("finished threads: ", nFinished)
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if nFinished == context.nThreads:
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context.event.set()
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def test_pendingcalls_non_threaded(self):
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#again, just using the main thread, likely they will all be dispatched at
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#once. It is ok to ask for too many, because we loop until we find a slot.
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#the loop can be interrupted to dispatch.
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#there are only 32 dispatch slots, so we go for twice that!
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l = []
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n = 64
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self.pendingcalls_submit(l, n)
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self.pendingcalls_wait(l, n)
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class SubinterpreterTest(unittest.TestCase):
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def test_subinterps(self):
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import builtins
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r, w = os.pipe()
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code = """if 1:
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import sys, builtins, pickle
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with open({:d}, "wb") as f:
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pickle.dump(id(sys.modules), f)
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pickle.dump(id(builtins), f)
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""".format(w)
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with open(r, "rb") as f:
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ret = support.run_in_subinterp(code)
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self.assertEqual(ret, 0)
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self.assertNotEqual(pickle.load(f), id(sys.modules))
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self.assertNotEqual(pickle.load(f), id(builtins))
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# Bug #6012
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class Test6012(unittest.TestCase):
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def test(self):
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self.assertEqual(_testcapi.argparsing("Hello", "World"), 1)
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class EmbeddingTests(unittest.TestCase):
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def setUp(self):
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basepath = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
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exename = "_testembed"
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if sys.platform.startswith("win"):
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ext = ("_d" if "_d" in sys.executable else "") + ".exe"
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exename += ext
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exepath = os.path.dirname(sys.executable)
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else:
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exepath = os.path.join(basepath, "Modules")
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self.test_exe = exe = os.path.join(exepath, exename)
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if not os.path.exists(exe):
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self.skipTest("%r doesn't exist" % exe)
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# This is needed otherwise we get a fatal error:
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# "Py_Initialize: Unable to get the locale encoding
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# LookupError: no codec search functions registered: can't find encoding"
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self.oldcwd = os.getcwd()
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os.chdir(basepath)
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def tearDown(self):
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os.chdir(self.oldcwd)
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def run_embedded_interpreter(self, *args):
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"""Runs a test in the embedded interpreter"""
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cmd = [self.test_exe]
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cmd.extend(args)
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p = subprocess.Popen(cmd,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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(out, err) = p.communicate()
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self.assertEqual(p.returncode, 0,
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"bad returncode %d, stderr is %r" %
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(p.returncode, err))
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return out.decode("latin1"), err.decode("latin1")
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def test_subinterps(self):
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# This is just a "don't crash" test
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out, err = self.run_embedded_interpreter()
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if support.verbose:
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print()
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print(out)
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print(err)
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@staticmethod
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def _get_default_pipe_encoding():
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rp, wp = os.pipe()
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try:
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with os.fdopen(wp, 'w') as w:
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default_pipe_encoding = w.encoding
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finally:
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os.close(rp)
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return default_pipe_encoding
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def test_forced_io_encoding(self):
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# Checks forced configuration of embedded interpreter IO streams
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out, err = self.run_embedded_interpreter("forced_io_encoding")
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if support.verbose:
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print()
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print(out)
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print(err)
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expected_stdin_encoding = sys.__stdin__.encoding
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expected_pipe_encoding = self._get_default_pipe_encoding()
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expected_output = os.linesep.join([
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"--- Use defaults ---",
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"Expected encoding: default",
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"Expected errors: default",
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"stdin: {0}:strict",
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"stdout: {1}:strict",
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"stderr: {1}:backslashreplace",
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"--- Set errors only ---",
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"Expected encoding: default",
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"Expected errors: surrogateescape",
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"stdin: {0}:surrogateescape",
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"stdout: {1}:surrogateescape",
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"stderr: {1}:backslashreplace",
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"--- Set encoding only ---",
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"Expected encoding: latin-1",
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"Expected errors: default",
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"stdin: latin-1:strict",
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"stdout: latin-1:strict",
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"stderr: latin-1:backslashreplace",
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"--- Set encoding and errors ---",
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"Expected encoding: latin-1",
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"Expected errors: surrogateescape",
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"stdin: latin-1:surrogateescape",
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"stdout: latin-1:surrogateescape",
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"stderr: latin-1:backslashreplace"]).format(expected_stdin_encoding,
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expected_pipe_encoding)
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# This is useful if we ever trip over odd platform behaviour
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self.maxDiff = None
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self.assertEqual(out.strip(), expected_output)
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class SkipitemTest(unittest.TestCase):
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def test_skipitem(self):
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"""
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If this test failed, you probably added a new "format unit"
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in Python/getargs.c, but neglected to update our poor friend
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skipitem() in the same file. (If so, shame on you!)
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With a few exceptions**, this function brute-force tests all
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printable ASCII*** characters (32 to 126 inclusive) as format units,
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checking to see that PyArg_ParseTupleAndKeywords() return consistent
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errors both when the unit is attempted to be used and when it is
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skipped. If the format unit doesn't exist, we'll get one of two
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specific error messages (one for used, one for skipped); if it does
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exist we *won't* get that error--we'll get either no error or some
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other error. If we get the specific "does not exist" error for one
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test and not for the other, there's a mismatch, and the test fails.
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** Some format units have special funny semantics and it would
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be difficult to accomodate them here. Since these are all
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well-established and properly skipped in skipitem() we can
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get away with not testing them--this test is really intended
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to catch *new* format units.
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*** Python C source files must be ASCII. Therefore it's impossible
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to have non-ASCII format units.
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"""
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empty_tuple = ()
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tuple_1 = (0,)
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dict_b = {'b':1}
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keywords = ["a", "b"]
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for i in range(32, 127):
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c = chr(i)
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# skip parentheses, the error reporting is inconsistent about them
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# skip 'e', it's always a two-character code
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# skip '|' and '$', they don't represent arguments anyway
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if c in '()e|$':
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continue
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# test the format unit when not skipped
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format = c + "i"
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try:
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# (note: the format string must be bytes!)
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_testcapi.parse_tuple_and_keywords(tuple_1, dict_b,
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format.encode("ascii"), keywords)
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when_not_skipped = False
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except TypeError as e:
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s = "argument 1 must be impossible<bad format char>, not int"
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when_not_skipped = (str(e) == s)
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except RuntimeError as e:
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when_not_skipped = False
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# test the format unit when skipped
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optional_format = "|" + format
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try:
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_testcapi.parse_tuple_and_keywords(empty_tuple, dict_b,
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optional_format.encode("ascii"), keywords)
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when_skipped = False
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except RuntimeError as e:
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s = "impossible<bad format char>: '{}'".format(format)
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when_skipped = (str(e) == s)
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message = ("test_skipitem_parity: "
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"detected mismatch between convertsimple and skipitem "
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"for format unit '{}' ({}), not skipped {}, skipped {}".format(
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c, i, when_skipped, when_not_skipped))
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self.assertIs(when_skipped, when_not_skipped, message)
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def test_parse_tuple_and_keywords(self):
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# parse_tuple_and_keywords error handling tests
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self.assertRaises(TypeError, _testcapi.parse_tuple_and_keywords,
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(), {}, 42, [])
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self.assertRaises(ValueError, _testcapi.parse_tuple_and_keywords,
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(), {}, b'', 42)
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self.assertRaises(ValueError, _testcapi.parse_tuple_and_keywords,
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(), {}, b'', [''] * 42)
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self.assertRaises(ValueError, _testcapi.parse_tuple_and_keywords,
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(), {}, b'', [42])
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@unittest.skipUnless(threading, 'Threading required for this test.')
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class TestThreadState(unittest.TestCase):
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@support.reap_threads
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def test_thread_state(self):
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# some extra thread-state tests driven via _testcapi
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def target():
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idents = []
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def callback():
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idents.append(threading.get_ident())
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_testcapi._test_thread_state(callback)
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a = b = callback
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time.sleep(1)
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# Check our main thread is in the list exactly 3 times.
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self.assertEqual(idents.count(threading.get_ident()), 3,
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"Couldn't find main thread correctly in the list")
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target()
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t = threading.Thread(target=target)
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t.start()
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t.join()
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class Test_testcapi(unittest.TestCase):
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def test__testcapi(self):
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for name in dir(_testcapi):
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if name.startswith('test_'):
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with self.subTest("internal", name=name):
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test = getattr(_testcapi, name)
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test()
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if __name__ == "__main__":
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unittest.main()
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