def get_arp_table():
with open(INPUT_DIR + '/arp.txt') as farp:
file_content = mock_open(read_data = farp.read())
file_content.return_value.__iter__ = lambda self : iter(self.readline, '')
# file_content = MagicMock(name = 'open', spec = open)
# file_content.return_value = iter(farp.readlines())
with patch('builtins.open', file_content):
return _get_arp_table()
# Replace the function with mocked one
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