content: {-# LANGUAGE TemplateHaskell #-}
  
  {-| Unittests for htools' ganeti-mond backend
  
  -}
  
  {-
  
  Copyright (C) 2015 Google Inc.
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  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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  -}
  
  module Test.Ganeti.HTools.Backend.MonD
    (testHTools_Backend_MonD
    ) where
  
  import qualified Test.HUnit as HUnit
  import qualified Text.JSON as J
  
  import qualified Ganeti.BasicTypes as BT
  import qualified Ganeti.DataCollectors.CPUload as CPUload
  
  import Ganeti.Cpu.Types (CPUavgload(..))
  import Ganeti.DataCollectors.Types (DCReport(..))
  import Ganeti.HTools.Backend.MonD
  import Ganeti.JSON
  import Test.Ganeti.TestCommon
  import Test.Ganeti.TestHelper
  
  {-# ANN module "HLint: ignore Use camelCase" #-}
  
  -- | Test a MonD data file.
  case_parseMonDData :: HUnit.Assertion
  case_parseMonDData = do
    let mond_data_file = "mond-data.txt"
        n1 = "node1.example.com"
        n2 = "node2.example.com"
        t1 = 1379507272000000000
        t2 = 1379507280000000000
        cpu_number1 = 4
        cpu_number2 = 2
        cpus1 = [ 0.04108859597350646,0.04456554528165781
                 , 0.06203619909502262,0.05595448881893895]
        cpus2 = [0.004155409618511363,0.0034586452012150787]
        cpu_total1 = 0.203643517607712
        cpu_total2 = 0.007614031289927129
        dcr1 = DCReport CPUload.dcName CPUload.dcVersion CPUload.dcFormatVersion
                 t1 CPUload.dcCategory CPUload.dcKind
                 (J.showJSON (CPUavgload cpu_number1 cpus1 cpu_total1))
        dcr2 = DCReport CPUload.dcName CPUload.dcVersion CPUload.dcFormatVersion
                 t2 CPUload.dcCategory CPUload.dcKind
                 (J.showJSON (CPUavgload cpu_number2 cpus2 cpu_total2))
        expected_list = [(n1,[dcr1]),(n2,[dcr2])]
    ans <- readTestData mond_data_file
    case pMonDData ans of
      BT.Ok l -> HUnit.assertBool ("Parsing " ++ mond_data_file ++ " failed")
                   (isAlEqual expected_list l)
      BT.Bad s -> HUnit.assertFailure $ "Parsing failed: " ++ s
  
  -- | Check for quality two list of tuples.
  isAlEqual :: [(String, [DCReport])] -> [(String, [DCReport])] -> Bool
  isAlEqual a b = and (zipWith tupleIsAlEqual a b)
  
  -- | Check a tuple for quality.
  tupleIsAlEqual :: (String, [DCReport]) -> (String, [DCReport]) -> Bool
  tupleIsAlEqual (na, a) (nb, b) =
    na == nb
    && and (zipWith dcReportIsAlmostEqual a b)
  
  -- | Check if two DCReports are equal. Only reports from CPUload Data
  -- Collectors are supported.
  dcReportIsAlmostEqual :: DCReport -> DCReport -> Bool
  dcReportIsAlmostEqual a b =
    dcReportName a == dcReportName b
    && dcReportVersion a == dcReportVersion b
    && dcReportFormatVersion a == dcReportFormatVersion b
    && dcReportTimestamp a == dcReportTimestamp b
    && dcReportCategory a == dcReportCategory b
    && dcReportKind a == dcReportKind b
    && case () of
         _ | CPUload.dcName == dcReportName a ->
               cpuavgloadDataIsAlmostEq (dcReportData a) (dcReportData b)
           | otherwise -> False
  
  -- | Converts two JSValue objects and compares them.
  cpuavgloadDataIsAlmostEq :: J.JSValue -> J.JSValue -> Bool
  cpuavgloadDataIsAlmostEq a b =
    case fromJVal a :: BT.Result CPUavgload of
      BT.Bad _ -> False
      BT.Ok cavA ->
        case fromJVal b :: BT.Result CPUavgload of
             BT.Bad _ -> False
             BT.Ok cavB -> compareCPUavgload cavA cavB
  
  -- | Compares two CPuavgload objects.
  compareCPUavgload :: CPUavgload -> CPUavgload -> Bool
  compareCPUavgload a b =
    let relError x y = relativeError x y <= 1e-9
    in cavCpuNumber a == cavCpuNumber b
       && relError (cavCpuTotal a) (cavCpuTotal b)
       && length (cavCpus a) == length (cavCpus b)
       && and (zipWith relError (cavCpus a) (cavCpus b))
  
  testSuite "HTools/Backend/MonD"
            [ 'case_parseMonDData
            ]
  