exec pint parse 'sum(http_requests_total{method="GET"} @ 1609746000)'
cmp stdout stdout.txt
! stderr .

-- stdout.txt --
++ node: sum(http_requests_total{method="GET"} @ 1609746000.000)
  AggregateExpr:
    * Type: vector
    * Op: sum
    * Expr: http_requests_total{method="GET"} @ 1609746000.000
    * Param: <nil>
    * Grouping: []
    * Without: false
      ++ node: http_requests_total{method="GET"} @ 1609746000.000
        VectorSelector:
          * Type: vector
          * Name: http_requests_total
          * Offset: 0s
          * LabelMatchers: [method="GET" __name__="http_requests_total"]
