{-# LANGUAGE TemplateHaskell #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}

{-| Unittests for the @/proc/diskstats@ parser -}

{-

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module Test.Ganeti.Storage.Diskstats.Parser (testBlock_Diskstats_Parser) where

import Test.QuickCheck as QuickCheck hiding (Result)
import Test.HUnit

import Test.Ganeti.TestHelper
import Test.Ganeti.TestCommon

import Control.Applicative ((<*>), (<$>))
import qualified Data.Attoparsec.Text as A
import Data.Text (pack)
import Text.Printf

import Ganeti.Storage.Diskstats.Parser (diskstatsParser)
import Ganeti.Storage.Diskstats.Types

{-# ANN module "HLint: ignore Use camelCase" #-}


-- | Test a diskstats.
case_diskstats :: Assertion
case_diskstats = testParser diskstatsParser "proc_diskstats.txt"
  [ Diskstats 1 0 "ram0" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 1 "ram1" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 2 "ram2" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 3 "ram3" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 4 "ram4" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 5 "ram5" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 6 "ram6" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 7 "ram7" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 8 "ram8" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 9 "ram9" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 10 "ram10" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 11 "ram11" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 12 "ram12" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 13 "ram13" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 14 "ram14" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 1 15 "ram15" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 0 "loop0" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 1 "loop1" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 2 "loop2" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 3 "loop3" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 4 "loop4" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 5 "loop5" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 6 "loop6" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 7 7 "loop7" 0 0 0 0 0 0 0 0 0 0 0
  , Diskstats 8 0 "sda" 89502 4833 4433387 89244 519115 62738 16059726 465120 0
    149148 554564
  , Diskstats 8 1 "sda1" 505 2431 8526 132 478 174 124358 8500 0 340 8632
  , Diskstats 8 2 "sda2" 2 0 4 4 0 0 0 0 0 4 4
  , Diskstats 8 5 "sda5" 88802 2269 4422249 89032 453703 62564 15935368 396244 0
    90064 485500
  , Diskstats 252 0 "dm-0" 90978 0 4420002 158632 582226 0 15935368 5592012 0
  167688 5750652
  , Diskstats 252 1 "dm-1" 88775 0 4402378 157204 469594 0 15136008 4910424 0
  164556 5067640
  , Diskstats 252 2 "dm-2" 1956 0 15648 1052 99920 0 799360 682492 0 4516 683552
  , Diskstats 8 16 "sdb" 0 0 0 0 0 0 0 0 0 0 0
  ]

-- | The instance for generating arbitrary Diskstats
instance Arbitrary Diskstats where
  arbitrary =
    Diskstats <$> genNonNegative <*> genNonNegative <*> genName
              <*> genNonNegative <*> genNonNegative <*> genNonNegative
              <*> genNonNegative <*> genNonNegative <*> genNonNegative
              <*> genNonNegative <*> genNonNegative <*> genNonNegative
              <*> genNonNegative <*> genNonNegative

-- | Serialize a list of Diskstats in a parsable way
serializeDiskstatsList :: [Diskstats] -> String
serializeDiskstatsList = concatMap serializeDiskstats

-- | Serialize a Diskstats in a parsable way
serializeDiskstats :: Diskstats -> String
serializeDiskstats ds =
  printf "\t%d\t%d %s %d %d %d %d %d %d %d %d %d %d %d\n"
    (dsMajor ds) (dsMinor ds) (dsName ds) (dsReadsNum ds) (dsMergedReads ds)
    (dsSecRead ds) (dsTimeRead ds) (dsWrites ds) (dsMergedWrites ds)
    (dsSecWritten ds) (dsTimeWrite ds) (dsIos ds) (dsTimeIO ds) (dsWIOmillis ds)

-- | Test whether an arbitrary Diskstats is parsed correctly
prop_diskstats :: [Diskstats] -> Property
prop_diskstats dsList =
    case A.parseOnly diskstatsParser $ pack (serializeDiskstatsList dsList) of
      Left msg -> failTest $ "Parsing failed: " ++ msg
      Right obtained -> dsList ==? obtained

testSuite "Block/Diskstats/Parser"
          [ 'case_diskstats,
            'prop_diskstats
          ]