def test_plus_mode(self):
# Write, then seek to 0
with open(self.tmpfilepath, 'w+') as f:
f.write(self.teststring)
f.seek(0)
new_f = pickle.loads(cloudpickle.dumps(f))
self.assertEqual(self.teststring, new_f.read())
os.remove(self.tmpfilepath)
def test_r_mode(self):
# Write & close
with open(self.tmpfilepath, 'w') as f:
f.write(self.teststring)
# Open for reading
with open(self.tmpfilepath, 'r') as f:
new_f = pickle.loads(cloudpickle.dumps(f))
self.assertEqual(self.teststring, new_f.read())
os.remove(self.tmpfilepath)
def test_seek(self):
# Write, then seek to arbitrary position
with open(self.tmpfilepath, 'w+') as f:
f.write(self.teststring)
f.seek(4)
unpickled = pickle.loads(cloudpickle.dumps(f))
# unpickled StringIO is at position 4
self.assertEqual(4, unpickled.tell())
self.assertEqual(self.teststring[4:], unpickled.read())
# but unpickled StringIO also contained the start
unpickled.seek(0)
self.assertEqual(self.teststring, unpickled.read())
os.remove(self.tmpfilepath)
def test_pickling_special_file_handles(self):
# Warning: if you want to run your tests with nose, add -s option
for out in sys.stdout, sys.stderr: # Regression test for SPARK-3415
self.assertEqual(out, pickle.loads(cloudpickle.dumps(out)))
self.assertRaises(pickle.PicklingError,
lambda: cloudpickle.dumps(sys.stdin))
def test_empty_file(self):
# Empty file
open(self.tmpfilepath, 'w').close()
with open(self.tmpfilepath, 'r') as f:
self.assertEqual('', pickle.loads(cloudpickle.dumps(f)).read())
os.remove(self.tmpfilepath)