class_docstr: Test class to test ThreatStream functionalities
class_docstr_tok: ["Test","class","to","test","ThreatStream","functionalities"]
docstr: ThreatStream - IOC Sources Property
docstr_tok: ["ThreatStream","-","IOC","Sources","Property"]
code: def test_ioc_sources(self):
      """ThreatStream - IOC Sources Property"""
      expected_value = ["crowdstrike", "@airbnb.com"]
      assert_equal(self.threatstream.ioc_sources, expected_value)
  
imports: from datetime import datetime
  import os
  import boto3
  from botocore.exceptions import ClientError
  from mock import Mock, patch
  from moto import mock_ssm
  from nose.tools import assert_equal, raises
  from streamalert.shared.config import load_config
  from streamalert.threat_intel_downloader.exceptions import ThreatStreamCredsError, ThreatStreamLambdaInvokeError, ThreatStreamRequestsError
  from streamalert.threat_intel_downloader.main import ThreatStream
  from tests.unit.streamalert.apps.test_helpers import MockLambdaClient
  from tests.unit.streamalert.shared.test_config import get_mock_lambda_context
  from tests.unit.streamalert.threat_intel_downloader.test_helpers import put_mock_params
label_desc: Use image node_id 17 for calling the TestThreatStream obj's underlying member method code with example usage: obj.test_ioc_sources() without return types