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# Run the _testcapi module tests (tests for the Python/C API): by defn,
# these are all functions _testcapi exports whose name begins with 'test_'.
from __future__ import with_statement
import os
import random
import subprocess
import sys
import time
import unittest
from test import support
try:
import threading
except ImportError:
threading = None
import _testcapi
def testfunction(self):
"""some doc"""
return self
class InstanceMethod:
id = _testcapi.instancemethod(id)
testfunction = _testcapi.instancemethod(testfunction)
class CAPITest(unittest.TestCase):
def test_instancemethod(self):
inst = InstanceMethod()
self.assertEqual(id(inst), inst.id())
self.assertTrue(inst.testfunction() is inst)
self.assertEqual(inst.testfunction.__doc__, testfunction.__doc__)
self.assertEqual(InstanceMethod.testfunction.__doc__, testfunction.__doc__)
InstanceMethod.testfunction.attribute = "test"
self.assertEqual(testfunction.attribute, "test")
self.assertRaises(AttributeError, setattr, inst.testfunction, "attribute", "test")
@unittest.skipUnless(threading, 'Threading required for this test.')
def test_no_FatalError_infinite_loop(self):
p = subprocess.Popen([sys.executable, "-c",
'import _testcapi;'
'_testcapi.crash_no_current_thread()'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = p.communicate()
self.assertEqual(out, b'')
# This used to cause an infinite loop.
self.assertEqual(err.rstrip(),
b'Fatal Python error:'
b' PyThreadState_Get: no current thread')
def test_memoryview_from_NULL_pointer(self):
self.assertRaises(ValueError, _testcapi.make_memoryview_from_NULL_pointer)
@unittest.skipUnless(threading, 'Threading required for this test.')
class TestPendingCalls(unittest.TestCase):
def pendingcalls_submit(self, l, n):
def callback():
#this function can be interrupted by thread switching so let's
#use an atomic operation
l.append(None)
for i in range(n):
time.sleep(random.random()*0.02) #0.01 secs on average
#try submitting callback until successful.
#rely on regular interrupt to flush queue if we are
#unsuccessful.
while True:
if _testcapi._pending_threadfunc(callback):
break;
def pendingcalls_wait(self, l, n, context = None):
#now, stick around until l[0] has grown to 10
count = 0;
while len(l) != n:
#this busy loop is where we expect to be interrupted to
#run our callbacks. Note that callbacks are only run on the
#main thread
if False and support.verbose:
print("(%i)"%(len(l),),)
for i in range(1000):
a = i*i
if context and not context.event.is_set():
continue
count += 1
self.assertTrue(count < 10000,
"timeout waiting for %i callbacks, got %i"%(n, len(l)))
if False and support.verbose:
print("(%i)"%(len(l),))
def test_pendingcalls_threaded(self):
#do every callback on a separate thread
n = 32 #total callbacks
threads = []
class foo(object):pass
context = foo()
context.l = []
context.n = 2 #submits per thread
context.nThreads = n // context.n
context.nFinished = 0
context.lock = threading.Lock()
context.event = threading.Event()
for i in range(context.nThreads):
t = threading.Thread(target=self.pendingcalls_thread, args = (context,))
t.start()
threads.append(t)
self.pendingcalls_wait(context.l, n, context)
for t in threads:
t.join()
def pendingcalls_thread(self, context):
try:
self.pendingcalls_submit(context.l, context.n)
finally:
with context.lock:
context.nFinished += 1
nFinished = context.nFinished
if False and support.verbose:
print("finished threads: ", nFinished)
if nFinished == context.nThreads:
context.event.set()
def test_pendingcalls_non_threaded(self):
#again, just using the main thread, likely they will all be dispatched at
#once. It is ok to ask for too many, because we loop until we find a slot.
#the loop can be interrupted to dispatch.
#there are only 32 dispatch slots, so we go for twice that!
l = []
n = 64
self.pendingcalls_submit(l, n)
self.pendingcalls_wait(l, n)
# Bug #6012
class Test6012(unittest.TestCase):
def test(self):
self.assertEqual(_testcapi.argparsing("Hello", "World"), 1)
class EmbeddingTest(unittest.TestCase):
def test_subinterps(self):
# XXX only tested under Unix checkouts
basepath = os.path.dirname(os.path.dirname(os.path.dirname(__file__)))
oldcwd = os.getcwd()
# This is needed otherwise we get a fatal error:
# "Py_Initialize: Unable to get the locale encoding
# LookupError: no codec search functions registered: can't find encoding"
os.chdir(basepath)
try:
exe = os.path.join(basepath, "Modules", "_testembed")
if not os.path.exists(exe):
self.skipTest("%r doesn't exist" % exe)
p = subprocess.Popen([exe],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
(out, err) = p.communicate()
self.assertEqual(p.returncode, 0,
"bad returncode %d, stderr is %r" %
(p.returncode, err))
if support.verbose:
print()
print(out.decode('latin1'))
print(err.decode('latin1'))
finally:
os.chdir(oldcwd)
def test_main():
support.run_unittest(CAPITest, TestPendingCalls, Test6012, EmbeddingTest)
for name in dir(_testcapi):
if name.startswith('test_'):
test = getattr(_testcapi, name)
if support.verbose:
print("internal", name)
test()
# some extra thread-state tests driven via _testcapi
def TestThreadState():
if support.verbose:
print("auto-thread-state")
idents = []
def callback():
idents.append(_thread.get_ident())
_testcapi._test_thread_state(callback)
a = b = callback
time.sleep(1)
# Check our main thread is in the list exactly 3 times.
if idents.count(_thread.get_ident()) != 3:
raise support.TestFailed(
"Couldn't find main thread correctly in the list")
if threading:
import _thread
import time
TestThreadState()
t = threading.Thread(target=TestThreadState)
t.start()
t.join()
if __name__ == "__main__":
test_main()
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