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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.Utils (testUtils) where

import Test.QuickCheck hiding (Result)

import Test.HUnit

import Data.Char (isSpace)

import Data.List

import qualified Text.JSON as J

import Test.Ganeti.TestHelper

import Test.Ganeti.TestCommon

import Ganeti.BasicTypes

import qualified Ganeti.JSON as JSON

import Ganeti.Utils

-- | Helper to generate a small string that doesn't contain commas.

genNonCommaString :: Gen String

genNonCommaString = do

  size <- choose (0, 20) -- arbitrary max size

  vectorOf size (arbitrary `suchThat` (/=) ',')

-- | If the list is not just an empty element, and if the elements do

-- not contain commas, then join+split should be idempotent.

prop_commaJoinSplit :: Property

prop_commaJoinSplit =

  forAll (choose (0, 20)) $ \llen ->

  forAll (vectorOf llen genNonCommaString `suchThat` (/=) [""]) $ \lst ->

  sepSplit ',' (commaJoin lst) ==? lst

-- | Split and join should always be idempotent.

prop_commaSplitJoin :: String -> Property

prop_commaSplitJoin s =

  commaJoin (sepSplit ',' s) ==? s

-- | fromObjWithDefault, we test using the Maybe monad and an integer

-- value.

prop_fromObjWithDefault :: Integer -> String -> Bool

prop_fromObjWithDefault def_value random_key =

  -- a missing key will be returned with the default

  JSON.fromObjWithDefault [] random_key def_value == Just def_value &&

  -- a found key will be returned as is, not with default

  JSON.fromObjWithDefault [(random_key, J.showJSON def_value)]

       random_key (def_value+1) == Just def_value

-- | Test that functional if' behaves like the syntactic sugar if.

prop_if'if :: Bool -> Int -> Int -> Gen Prop

prop_if'if cnd a b =

  if' cnd a b ==? if cnd then a else b

-- | Test basic select functionality

prop_select :: Int      -- ^ Default result

            -> [Int]    -- ^ List of False values

            -> [Int]    -- ^ List of True values

            -> Gen Prop -- ^ Test result

prop_select def lst1 lst2 =

  select def (flist ++ tlist) ==? expectedresult

    where expectedresult = if' (null lst2) def (head lst2)

          flist = zip (repeat False) lst1

          tlist = zip (repeat True)  lst2

-- | Test basic select functionality with undefined default

prop_select_undefd :: [Int]            -- ^ List of False values

                   -> NonEmptyList Int -- ^ List of True values

                   -> Gen Prop         -- ^ Test result

prop_select_undefd lst1 (NonEmpty lst2) =

  select undefined (flist ++ tlist) ==? head lst2

    where flist = zip (repeat False) lst1

          tlist = zip (repeat True)  lst2

-- | Test basic select functionality with undefined list values

prop_select_undefv :: [Int]            -- ^ List of False values

                   -> NonEmptyList Int -- ^ List of True values

                   -> Gen Prop         -- ^ Test result

prop_select_undefv lst1 (NonEmpty lst2) =

  select undefined cndlist ==? head lst2

    where flist = zip (repeat False) lst1

          tlist = zip (repeat True)  lst2

          cndlist = flist ++ tlist ++ [undefined]

prop_parseUnit :: NonNegative Int -> Property

prop_parseUnit (NonNegative n) =

  conjoin

  [ parseUnit (show n) ==? (Ok n::Result Int)

  , parseUnit (show n ++ "m") ==? (Ok n::Result Int)

  , parseUnit (show n ++ "M") ==? (Ok (truncate n_mb)::Result Int)

  , parseUnit (show n ++ "g") ==? (Ok (n*1024)::Result Int)

  , parseUnit (show n ++ "G") ==? (Ok (truncate n_gb)::Result Int)

  , parseUnit (show n ++ "t") ==? (Ok (n*1048576)::Result Int)

  , parseUnit (show n ++ "T") ==? (Ok (truncate n_tb)::Result Int)

  , printTestCase "Internal error/overflow?"

    (n_mb >=0 && n_gb >= 0 && n_tb >= 0)

  , property (isBad (parseUnit (show n ++ "x")::Result Int))

  ]

  where n_mb = (fromIntegral n::Rational) * 1000 * 1000 / 1024 / 1024

        n_gb = n_mb * 1000

        n_tb = n_gb * 1000

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

case_niceSort_static :: Assertion

case_niceSort_static = do

  assertEqual "empty list" [] $ niceSort []

  assertEqual "punctuation" [",", "."] $ niceSort [",", "."]

  assertEqual "decimal numbers" ["0.1", "0.2"] $ niceSort ["0.1", "0.2"]

  assertEqual "various numbers" ["0,099", "0.1", "0.2", "0;099"] $

              niceSort ["0;099", "0,099", "0.1", "0.2"]

  assertEqual "simple concat" ["0000", "a0", "a1", "a2", "a20", "a99",

                               "b00", "b10", "b70"] $

    niceSort ["a0", "a1", "a99", "a20", "a2", "b10", "b70", "b00", "0000"]

  assertEqual "ranges" ["A", "Z", "a0-0", "a0-4", "a1-0", "a9-1", "a09-2",

                      "a20-3", "a99-3", "a99-10", "b"] $

    niceSort ["a0-0", "a1-0", "a99-10", "a20-3", "a0-4", "a99-3", "a09-2",

              "Z", "a9-1", "A", "b"]

  assertEqual "large"

    ["3jTwJPtrXOY22bwL2YoW", "Eegah9ei", "KOt7vn1dWXi",

     "KVQqLPDjcPjf8T3oyzjcOsfkb", "WvNJd91OoXvLzdEiEXa6",

     "Z8Ljf1Pf5eBfNg171wJR", "a07h8feON165N67PIE", "bH4Q7aCu3PUPjK3JtH",

     "cPRi0lM7HLnSuWA2G9", "guKJkXnkULealVC8CyF1xefym",

     "pqF8dkU5B1cMnyZuREaSOADYx", "uHXAyYYftCSG1o7qcCqe",

     "xij88brTulHYAv8IEOyU", "xpIUJeVT1Rp"] $

    niceSort ["Eegah9ei", "xij88brTulHYAv8IEOyU", "3jTwJPtrXOY22bwL2YoW",

             "Z8Ljf1Pf5eBfNg171wJR", "WvNJd91OoXvLzdEiEXa6",

             "uHXAyYYftCSG1o7qcCqe", "xpIUJeVT1Rp", "KOt7vn1dWXi",

             "a07h8feON165N67PIE", "bH4Q7aCu3PUPjK3JtH",

             "cPRi0lM7HLnSuWA2G9", "KVQqLPDjcPjf8T3oyzjcOsfkb",

             "guKJkXnkULealVC8CyF1xefym", "pqF8dkU5B1cMnyZuREaSOADYx"]

-- | Tests single-string behaviour of 'niceSort'. Last test is special

-- in the sense that /0/ is before any other non-empty string (except

-- itself, etc.).

prop_niceSort_single :: Property

prop_niceSort_single =

  forAll genName $ \name ->

  conjoin

  [ printTestCase "single string" $ [name] ==? niceSort [name]

  , printTestCase "single plus empty" $ ["", name] ==? niceSort [name, ""]

  , printTestCase "single plus 0-digit" $ ["0", name] ==? niceSort [name, "0"]

  ]

-- | Tests some generic 'niceSort' properties. Note that the last test

-- must add a non-digit prefix; a digit one might change ordering.

prop_niceSort_generic :: Property

prop_niceSort_generic =

  forAll (resize 20 arbitrary) $ \names ->

  let n_sorted = niceSort names in

  conjoin [ printTestCase "length" $ length names ==? length n_sorted

          , printTestCase "same strings" $ sort names ==? sort n_sorted

          , printTestCase "idempotence" $ n_sorted ==? niceSort n_sorted

          , printTestCase "static prefix" $ n_sorted ==?

              map tail (niceSort $ map (" "++) names)

          ]

-- | Tests that niceSorting numbers is identical to actual sorting

-- them (in numeric form).

prop_niceSort_numbers :: Property

prop_niceSort_numbers =

  forAll (listOf (arbitrary::Gen (NonNegative Int))) $ \numbers ->

  map show (sort numbers) ==? niceSort (map show numbers)

-- | Tests that 'niceSort' and 'niceSortKey' are equivalent.

prop_niceSortKey_equiv :: Property

prop_niceSortKey_equiv =

  forAll (resize 20 arbitrary) $ \names ->

  forAll (vectorOf (length names) (arbitrary::Gen Int)) $ \numbers ->

  let n_sorted = niceSort names in

  conjoin

  [ printTestCase "key id" $ n_sorted ==? niceSortKey id names

  , printTestCase "key rev" $ niceSort (map reverse names) ==?

                              map reverse (niceSortKey reverse names)

  , printTestCase "key snd" $ n_sorted ==? map snd (niceSortKey snd $

                                                    zip numbers names)

  ]

-- | Tests 'rstripSpace'.

prop_rStripSpace :: NonEmptyList Char -> Property

prop_rStripSpace (NonEmpty str) =

  forAll (resize 50 $ listOf1 (arbitrary `suchThat` isSpace)) $ \whitespace ->

  conjoin [ printTestCase "arb. string last char is not space" $

              case rStripSpace str of

                [] -> True

                xs -> not . isSpace $ last xs

          , printTestCase "whitespace suffix is stripped" $

              rStripSpace str ==? rStripSpace (str ++ whitespace)

          , printTestCase "whitespace reduced to null" $

              rStripSpace whitespace ==? ""

          , printTestCase "idempotent on empty strings" $

              rStripSpace "" ==? ""

          ]

-- | Test list for the Utils module.

testSuite "Utils"

            [ 'prop_commaJoinSplit

            , 'prop_commaSplitJoin

            , 'prop_fromObjWithDefault

            , 'prop_if'if

            , 'prop_select

            , 'prop_select_undefd

            , 'prop_select_undefv

            , 'prop_parseUnit

            , 'case_niceSort_static

            , 'prop_niceSort_single

            , 'prop_niceSort_generic

            , 'prop_niceSort_numbers

            , 'prop_niceSortKey_equiv

            , 'prop_rStripSpace

            ]