Synnefo » snf-ganeti

{-# LANGUAGE TemplateHaskell #-}

{-| Unittests for our template-haskell generated code.

-}

{-

Copyright (C) 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.THH

  ( testTHH

  ) where

import Test.QuickCheck

import Text.JSON

import Ganeti.THH

import Test.Ganeti.TestHelper

import Test.Ganeti.TestCommon

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

-- * Custom types

-- | Type used to test optional field implementation. Equivalent to

-- @data TestObj = TestObj { tobjA :: Maybe Int, tobjB :: Maybe Int

-- }@.

$(buildObject "TestObj" "tobj"

  [ optionalField $ simpleField "a" [t| Int |]

  , optionalNullSerField $ simpleField "b" [t| Int |]

  ])

-- | Arbitrary instance for 'TestObj'.

$(genArbitrary ''TestObj)

-- | Tests that serialising an (arbitrary) 'TestObj' instance is

-- correct: fully optional fields are represented in the resulting

-- dictionary only when non-null, optional-but-required fields are

-- always represented (with either null or an actual value).

prop_OptFields :: TestObj -> Property

prop_OptFields to =

  let a_member = case tobjA to of

                   Nothing -> []

                   Just x -> [("a", showJSON x)]

      b_member = [("b", case tobjB to of

                          Nothing -> JSNull

                          Just x -> showJSON x)]

  in showJSON to ==? makeObj (a_member ++ b_member)

testSuite "THH"

            [ 'prop_OptFields

            ]