class_docstr: Tests the S3Driver
  
  This was largely ported over from test_lookup_tables.py from the old implementation.
class_docstr_tok: ["Tests","the","S3Driver","This","was","largely","ported","over","from","test_lookup_tables.py","from","the","old","implementation","."]
code: def setup(self):
      self._cache = DriverCache()
  
file_path: streamalert/tests/unit/streamalert/shared/lookup_tables/test_cache.py
imports: from datetime import datetime
  from nose.tools import assert_equal, assert_false, assert_true
  from streamalert.shared.lookup_tables.cache import DriverCache
label_desc: Use image node_id 1 for calling the TestDriverCache obj's underlying member method code with example usage: obj.setup() without return types