class_docstr: Test class for SQSClient
class_docstr_tok: ["Test","class","for","SQSClient"]
docstr: Teardown after each method
docstr_tok: ["Teardown","after","each","method"]
code: def teardown(self):
      """Teardown after each method"""
      SQSClient._queue = None
  
imports: from botocore.exceptions import ClientError
  from mock import Mock, patch
  from nose.tools import assert_equal, assert_raises
  import streamalert.classifier.clients.sqs
  from streamalert.classifier.clients.sqs import SQSClient, SQSClientError
label_desc: Use image node_id 2 for calling the TestSQSClient obj's underlying member method code with example usage: obj.teardown() without return types