anchor.diff:    "response" : {
       "took" : 12144,
       "timed_out" : false,
  -    "num_reduce_phases" : 38, <4>
  +    "num_reduce_phases" : 46, <4>
       "_shards" : {
         "total" : 562, <5>
         "successful" : 188,
  
positive.code: // TESTRESPONSE[s/"successful" : 188/"successful": $body.response._shards.successful/]
  // TESTRESPONSE[s/"value" : 456433/"value": $body.response.hits.total.value/]
  // TESTRESPONSE[s/"buckets" : \[\]/"buckets": $body.response.aggregations.sale_date.buckets/]
  // TESTRESPONSE[s/"num_reduce_phases" : 38,//]
  
  <1> Whether the returned search results are partial or final
  <2> Whether the search is still being executed or it has completed
  
negative.code:     }
  }
  --------------------------------------------------
  // TEST[setup:sales]
  // TEST[s/size=0/size=0&wait_for_completion=10s&clean_on_completion=false/]
  
  The response contains an identifier of the search being executed.
  You can use this ID to later retrieve the search's final results.
  