def test_cleanTemp(self):
# a write temp and clean temp should not affect original file
source_file = os.path.join(TEST_DATA_DIR, 'test_file.dat')
ntools.assert_true(os.path.isfile(source_file))
d = DataFileElement(source_file)
d.write_temp()
ntools.assert_equal(len(d._temp_filepath_stack), 0)
d.clean_temp()
ntools.assert_true(os.path.isfile(source_file))
