os.close(f)

self.assertTrue(os.access(os_helper.TESTFN, os.W_OK))

@unittest.skipIf(

support.is_emscripten, "Test is unstable under Emscripten."

)

def test_closerange(self):

first = os.open(os_helper.TESTFN, os.O_CREAT|os.O_RDWR)

# We must allocate two consecutive file descriptors, otherwise

'dir5', 'dir6')

os.makedirs(path)

@unittest.skipIf(support.is_emscripten, "Emscripten's umask is a stub.")

def test_mode(self):

with os_helper.temp_umask(0o002):

base = os_helper.TESTFN

self.check(os.fchown, -1, -1)

@unittest.skipUnless(hasattr(os, 'fpathconf'), 'test needs os.fpathconf()')

@unittest.skipIf(

support.is_emscripten, "musl libc issue on Emscripten, bpo-46390"

)

def test_fpathconf(self):

self.check(os.pathconf, "PC_NAME_MAX")

self.check(os.fpathconf, "PC_NAME_MAX")

@unittest.skipUnless(hasattr(os, 'get_blocking'),

'needs os.get_blocking() and os.set_blocking()')

@unittest.skipIf(support.is_emscripten, "Cannot unset blocking flag")

class BlockingTests(unittest.TestCase):

def test_blocking(self):

fd = os.open(__file__, os.O_RDONLY)

self.assertEqual(times.elapsed, 0)

@requires_os_func('fork')

@support.requires_fork()

class ForkTests(unittest.TestCase):

def test_fork(self):

# bpo-42540: ensure os.fork() with non-default memory allocator does