# 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 pickle import random import subprocess import sys import time import unittest from test import support try: import _posixsubprocess except ImportError: _posixsubprocess = None 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): with support.SuppressCrashReport(): 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.assertTrue(err.rstrip().startswith( 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) def test_exc_info(self): raised_exception = ValueError("5") new_exc = TypeError("TEST") try: raise raised_exception except ValueError as e: tb = e.__traceback__ orig_sys_exc_info = sys.exc_info() orig_exc_info = _testcapi.set_exc_info(new_exc.__class__, new_exc, None) new_sys_exc_info = sys.exc_info() new_exc_info = _testcapi.set_exc_info(*orig_exc_info) reset_sys_exc_info = sys.exc_info() self.assertEqual(orig_exc_info[1], e) self.assertSequenceEqual(orig_exc_info, (raised_exception.__class__, raised_exception, tb)) self.assertSequenceEqual(orig_sys_exc_info, orig_exc_info) self.assertSequenceEqual(reset_sys_exc_info, orig_exc_info) self.assertSequenceEqual(new_exc_info, (new_exc.__class__, new_exc, None)) self.assertSequenceEqual(new_sys_exc_info, new_exc_info) else: self.assertTrue(False) @unittest.skipUnless(_posixsubprocess, '_posixsubprocess required for this test.') def test_seq_bytes_to_charp_array(self): # Issue #15732: crash in _PySequence_BytesToCharpArray() class Z(object): def __len__(self): return 1 self.assertRaises(TypeError, _posixsubprocess.fork_exec, 1,Z(),3,[1, 2],5,6,7,8,9,10,11,12,13,14,15,16,17) # Issue #15736: overflow in _PySequence_BytesToCharpArray() class Z(object): def __len__(self): return sys.maxsize def __getitem__(self, i): return b'x' self.assertRaises(MemoryError, _posixsubprocess.fork_exec, 1,Z(),3,[1, 2],5,6,7,8,9,10,11,12,13,14,15,16,17) @unittest.skipUnless(_posixsubprocess, '_posixsubprocess required for this test.') def test_subprocess_fork_exec(self): class Z(object): def __len__(self): return 1 # Issue #15738: crash in subprocess_fork_exec() self.assertRaises(TypeError, _posixsubprocess.fork_exec, Z(),[b'1'],3,[1, 2],5,6,7,8,9,10,11,12,13,14,15,16,17) @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) class SubinterpreterTest(unittest.TestCase): def test_subinterps(self): import builtins r, w = os.pipe() code = """if 1: import sys, builtins, pickle with open({:d}, "wb") as f: pickle.dump(id(sys.modules), f) pickle.dump(id(builtins), f) """.format(w) with open(r, "rb") as f: ret = _testcapi.run_in_subinterp(code) self.assertEqual(ret, 0) self.assertNotEqual(pickle.load(f), id(sys.modules)) self.assertNotEqual(pickle.load(f), id(builtins)) # Bug #6012 class Test6012(unittest.TestCase): def test(self): self.assertEqual(_testcapi.argparsing("Hello", "World"), 1) class EmbeddingTest(unittest.TestCase): @unittest.skipIf( sys.platform.startswith('win'), "test doesn't work under Windows") 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) class SkipitemTest(unittest.TestCase): def test_skipitem(self): """ If this test failed, you probably added a new "format unit" in Python/getargs.c, but neglected to update our poor friend skipitem() in the same file. (If so, shame on you!) With a few exceptions**, this function brute-force tests all printable ASCII*** characters (32 to 126 inclusive) as format units, checking to see that PyArg_ParseTupleAndKeywords() return consistent errors both when the unit is attempted to be used and when it is skipped. If the format unit doesn't exist, we'll get one of two specific error messages (one for used, one for skipped); if it does exist we *won't* get that error--we'll get either no error or some other error. If we get the specific "does not exist" error for one test and not for the other, there's a mismatch, and the test fails. ** Some format units have special funny semantics and it would be difficult to accomodate them here. Since these are all well-established and properly skipped in skipitem() we can get away with not testing them--this test is really intended to catch *new* format units. *** Python C source files must be ASCII. Therefore it's impossible to have non-ASCII format units. """ empty_tuple = () tuple_1 = (0,) dict_b = {'b':1} keywords = ["a", "b"] for i in range(32, 127): c = chr(i) # skip parentheses, the error reporting is inconsistent about them # skip 'e', it's always a two-character code # skip '|' and '$', they don't represent arguments anyway if c in '()e|$': continue # test the format unit when not skipped format = c + "i" try: # (note: the format string must be bytes!) _testcapi.parse_tuple_and_keywords(tuple_1, dict_b, format.encode("ascii"), keywords) when_not_skipped = False except TypeError as e: s = "argument 1 must be impossible, not int" when_not_skipped = (str(e) == s) except RuntimeError as e: when_not_skipped = False # test the format unit when skipped optional_format = "|" + format try: _testcapi.parse_tuple_and_keywords(empty_tuple, dict_b, optional_format.encode("ascii"), keywords) when_skipped = False except RuntimeError as e: s = "impossible: '{}'".format(format) when_skipped = (str(e) == s) message = ("test_skipitem_parity: " "detected mismatch between convertsimple and skipitem " "for format unit '{}' ({}), not skipped {}, skipped {}".format( c, i, when_skipped, when_not_skipped)) self.assertIs(when_skipped, when_not_skipped, message) def test_parse_tuple_and_keywords(self): # parse_tuple_and_keywords error handling tests self.assertRaises(TypeError, _testcapi.parse_tuple_and_keywords, (), {}, 42, []) self.assertRaises(ValueError, _testcapi.parse_tuple_and_keywords, (), {}, b'', 42) self.assertRaises(ValueError, _testcapi.parse_tuple_and_keywords, (), {}, b'', [''] * 42) self.assertRaises(ValueError, _testcapi.parse_tuple_and_keywords, (), {}, b'', [42]) @unittest.skipUnless(threading, 'Threading required for this test.') class TestThreadState(unittest.TestCase): @support.reap_threads def test_thread_state(self): # some extra thread-state tests driven via _testcapi def target(): idents = [] def callback(): idents.append(threading.get_ident()) _testcapi._test_thread_state(callback) a = b = callback time.sleep(1) # Check our main thread is in the list exactly 3 times. self.assertEqual(idents.count(threading.get_ident()), 3, "Couldn't find main thread correctly in the list") target() t = threading.Thread(target=target) t.start() t.join() def test_main(): support.run_unittest(CAPITest, TestPendingCalls, Test6012, EmbeddingTest, SkipitemTest, TestThreadState, SubinterpreterTest) for name in dir(_testcapi): if name.startswith('test_'): test = getattr(_testcapi, name) if support.verbose: print("internal", name) test() if __name__ == "__main__": test_main()