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{-# LANGUAGE TemplateHaskell #-}

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

{-| Unittests for ganeti-htools.

-}

{-

Copyright (C) 2009, 2010, 2011, 2012 Google Inc.

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 2 of the License, or

(at your option) any later version.

This program is distributed in the hope that it will be useful, but

WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.

-}

module Test.Ganeti.Query.Language

  ( testQuery_Language

  , genFilter

  , genJSValue

  ) where

import Test.QuickCheck

import Control.Applicative

import Control.Arrow (second)

import Text.JSON

import Test.Ganeti.TestHelper

import Test.Ganeti.TestCommon

import Ganeti.Query.Language

-- | Custom 'Filter' generator (top-level), which enforces a

-- (sane) limit on the depth of the generated filters.

genFilter :: Gen (Filter FilterField)

genFilter = choose (0, 10) >>= genFilter'

-- | Custom generator for filters that correctly halves the state of

-- the generators at each recursive step, per the QuickCheck

-- documentation, in order not to run out of memory.

genFilter' :: Int -> Gen (Filter FilterField)

genFilter' 0 =

  oneof [ pure EmptyFilter

        , TrueFilter     <$> genName

        , EQFilter       <$> genName <*> value

        , LTFilter       <$> genName <*> value

        , GTFilter       <$> genName <*> value

        , LEFilter       <$> genName <*> value

        , GEFilter       <$> genName <*> value

        , RegexpFilter   <$> genName <*> arbitrary

        , ContainsFilter <$> genName <*> value

        ]

    where value = oneof [ QuotedString <$> genName

                        , NumericValue <$> arbitrary

                        ]

genFilter' n =

  oneof [ AndFilter  <$> vectorOf n'' (genFilter' n')

        , OrFilter   <$> vectorOf n'' (genFilter' n')

        , NotFilter  <$> genFilter' n'

        ]

  where n' = n `div` 2 -- sub-filter generator size

        n'' = max n' 2 -- but we don't want empty or 1-element lists,

                       -- so use this for and/or filter list length

$(genArbitrary ''QueryTypeOp)

$(genArbitrary ''QueryTypeLuxi)

$(genArbitrary ''ItemType)

instance Arbitrary FilterRegex where

  arbitrary = genName >>= mkRegex -- a name should be a good regex

$(genArbitrary ''ResultStatus)

$(genArbitrary ''FieldType)

$(genArbitrary ''FieldDefinition)

-- | Generates an arbitrary JSValue. We do this via a function a not

-- via arbitrary instance since that would require us to define an

-- arbitrary for JSValue, which can be recursive, entering the usual

-- problems with that; so we only generate the base types, not the

-- recursive ones, and not 'JSNull', which we can't use in a

-- 'RSNormal' 'ResultEntry'.

genJSValue :: Gen JSValue

genJSValue =

  oneof [ JSBool <$> arbitrary

        , JSRational <$> pure False <*> arbitrary

        , JSString <$> (toJSString <$> arbitrary)

        , (JSArray . map showJSON) <$> (arbitrary::Gen [Int])

        , JSObject . toJSObject . map (second showJSON) <$>

          (arbitrary::Gen [(String, Int)])

        ]

-- | Generates a 'ResultEntry' value.

genResultEntry :: Gen ResultEntry

genResultEntry = do

  rs <- arbitrary

  rv <- case rs of

          RSNormal -> Just <$> genJSValue

          _ -> pure Nothing

  return $ ResultEntry rs rv

$(genArbitrary ''QueryFieldsResult)

-- | Tests that serialisation/deserialisation of filters is

-- idempotent.

prop_filter_serialisation :: Property

prop_filter_serialisation = forAll genFilter testSerialisation

-- | Tests that filter regexes are serialised correctly.

prop_filterregex_instances :: FilterRegex -> Property

prop_filterregex_instances rex =

  printTestCase "failed JSON encoding" (testSerialisation rex)

-- | Tests 'ResultStatus' serialisation.

prop_resultstatus_serialisation :: ResultStatus -> Property

prop_resultstatus_serialisation = testSerialisation

-- | Tests 'FieldType' serialisation.

prop_fieldtype_serialisation :: FieldType -> Property

prop_fieldtype_serialisation = testSerialisation

-- | Tests 'FieldDef' serialisation.

prop_fielddef_serialisation :: FieldDefinition -> Property

prop_fielddef_serialisation = testSerialisation

-- | Tests 'ResultEntry' serialisation. Needed especially as this is

-- done manually, and not via buildObject (different serialisation

-- format).

prop_resultentry_serialisation :: Property

prop_resultentry_serialisation = forAll genResultEntry testSerialisation

-- | Tests 'FieldDef' serialisation. We use a made-up maximum limit of

-- 20 for the generator, since otherwise the lists become too long and

-- we don't care so much about list length but rather structure.

prop_fieldsresult_serialisation :: Property

prop_fieldsresult_serialisation =

  forAll (resize 20 arbitrary::Gen QueryFieldsResult) testSerialisation

-- | Tests 'ItemType' serialisation.

prop_itemtype_serialisation :: ItemType -> Property

prop_itemtype_serialisation = testSerialisation

testSuite "Query/Language"

  [ 'prop_filter_serialisation

  , 'prop_filterregex_instances

  , 'prop_resultstatus_serialisation

  , 'prop_fieldtype_serialisation

  , 'prop_fielddef_serialisation

  , 'prop_resultentry_serialisation

  , 'prop_fieldsresult_serialisation

  , 'prop_itemtype_serialisation

  ]