class_docstr: Test class for FirehoseClient
code: def _sample_raw_records(cls, count=2):
      return [
          {"key_{}".format(i): "value_{}".format(i)}
          for i in range(count)
      ]
  
imports: from botocore.exceptions import ClientError
  from mock import Mock, patch
  from nose.tools import assert_equal
  from streamalert.shared.firehose import FirehoseClient
label_desc: Use image node_id 4 for calling the TestFirehoseClient obj's underlying member method code with example usage: obj._sample_raw_records(cls, count) and returns: unknown