class_docstr: Test shared Alert class.
docstr: Alert Class - Remaining Outputs - With Merge Config
docstr_tok: ["Alert","Class","-","Remaining","Outputs","-","With","Merge","Config"]
code: def test_remaining_outputs_merge_enabled(self):
      """Alert Class - Remaining Outputs - With Merge Config"""
      # Only the required firehose output shows as remaining
      assert_equal(
          {"aws-firehose:alerts"},
          self._customized_alert().remaining_outputs,
      )
  
imports: import copy
  from datetime import datetime, timedelta
  import json
  from nose.tools import assert_equal, assert_false, assert_is_instance, assert_not_in, assert_raises, assert_true
  from streamalert.shared.alert import Alert, AlertCreationError
label_desc: Use image node_id 10 for calling the TestAlert obj's underlying member method code with example usage: obj.test_remaining_outputs_merge_enabled() without return types