def test_write_file_dup_lseek_read(self):
try:
f = File(self.vol.open("dune", os.O_CREAT | os.O_EXCL | os.O_RDWR))
f.write(b"I must not fear. Fear is the mind-killer.")
fdup = f.dup()
self.assertTrue(isinstance(fdup, File))
f.close()
ret = fdup.lseek(0, os.SEEK_SET)
self.assertEqual(ret, 0)
buf = fdup.read(15)
self.assertEqual(buf, b"I must not fear")
ret = fdup.lseek(29, os.SEEK_SET)
self.assertEqual(ret, 29)
buf = fdup.read(11)
self.assertEqual(buf, b"mind-killer")
fdup.close()
except OSError as e:
self.fail(e.message)
def test_write_file_dup_lseek_read(self):
try:
f = File(self.vol.open("dune", os.O_CREAT | os.O_EXCL | os.O_RDWR))
f.write("I must not fear. Fear is the mind-killer.")
fdup = f.dup()
self.assertTrue(isinstance(fdup, File))
f.close()
ret = fdup.lseek(0, os.SEEK_SET)
self.assertEqual(ret, 0)
buf = fdup.read(15)
self.assertEqual(buf, "I must not fear")
ret = fdup.lseek(29, os.SEEK_SET)
self.assertEqual(ret, 29)
buf = fdup.read(11)
self.assertEqual(buf, "mind-killer")
fdup.close()
except OSError as e:
self.fail(e.message)
