def testCaching(self):
m = mock_open()
os.makedirs = MagicMock(return_value=True)
with patch('__builtin__.open', mock_open(read_data='Source Template'), create=True) as m:
t = Template(self.zp)
t.dest_file = 'foo.py'
t.tfile = 'foo.py.tmpl'
t.cacheTemplate()
# Write File Handle
wfh = m.return_value.__enter__.return_value
self.assertEqual(wfh.write.call_args_list, [call('## Source Template foo.py.tmpl \n'), call('Source Template')])
