Language/Symantic/Expr/Bool/Test.hs

   1 {-# LANGUAGE FlexibleContexts #-}
   2 {-# LANGUAGE GADTs #-}
   3 {-# LANGUAGE NoMonomorphismRestriction #-}
   4 {-# LANGUAGE Rank2Types #-}
   5 {-# LANGUAGE ScopedTypeVariables #-}
   6 {-# LANGUAGE TypeOperators #-}
   7 {-# OPTIONS_GHC -fno-warn-missing-signatures #-}
   8 module Expr.Bool.Test where
   9
  10 import Test.Tasty
  11 import Test.Tasty.HUnit
  12
  13 import qualified Control.Arrow as Arrow
  14 import qualified Control.Monad as Monad
  15 -- import Control.Monad.IO.Class (MonadIO(..))
  16 import Data.Proxy (Proxy(..))
  17 import Data.Text (Text)
  18 import Data.Type.Equality ((:~:)(Refl))
  19 import Prelude hiding ((&&), not, (||))
  20
  21 import Language.Symantic.Repr
  22 import Language.Symantic.Expr
  23 import Language.Symantic.Type
  24 import Language.Symantic.Trans
  25
  26 import AST.Test
  27
  28 -- * Class 'Sym_Bool_Vars'
  29
  30 -- | A few boolean variables.
  31 class Sym_Bool_Vars repr where
  32         x :: repr Bool
  33         y :: repr Bool
  34         z :: repr Bool
  35 instance Sym_Bool_Vars Repr_Text where
  36         x = Repr_Text $ \_p _v -> "x"
  37         y = Repr_Text $ \_p _v -> "y"
  38         z = Repr_Text $ \_p _v -> "z"
  39 instance -- Trans_Boo_Const
  40  ( Sym_Bool repr
  41  , Sym_Bool_Vars repr
  42  ) => Sym_Bool_Vars (Trans_Bool_Const repr) where
  43         x = trans_lift x
  44         y = trans_lift y
  45         z = trans_lift z
  46
  47 -- * Expressions
  48 e1 = bool True && bool False
  49 e2 = (bool True && bool False) ||  (bool True && bool True)
  50 e3 = (bool True ||  bool False) && (bool True ||  bool True)
  51 e4 = bool True && not (bool False)
  52 e5 = bool True && not x
  53 e6 = x `xor` y
  54 e7 = (x `xor` y) `xor` z
  55 e8 = x `xor` (y `xor` bool True)
  56
  57 -- * Tests
  58 type Ex = Expr_Root
  59  (   Expr_Lambda
  60  .|. Expr_Bool
  61  )
  62 ex_from = root_expr_from (Proxy::Proxy Ex)
  63
  64 (==>) ast expected =
  65         testCase (show ast) $
  66         case ex_from ast of
  67          Left err -> Left err @?= snd `Arrow.left` expected
  68          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  69                 case expected of
  70                  Left (_, err) -> Right ("…"::String) @?= Left err
  71                  Right (ty_expected::Type_Root_of_Expr Ex h, _::h, _::Text) ->
  72                         (Monad.>>= (@?= (\(_::Proxy h, err) -> err) `Arrow.left` expected)) $
  73                         case ty `eq_type` ty_expected of
  74                          Nothing -> Monad.return $ Left $
  75                                 error_expr (Proxy::Proxy Ex) $
  76                                 Error_Expr_Type_mismatch ast
  77                                  (Exists_Type ty)
  78                                  (Exists_Type ty_expected)
  79                          Just Refl -> do
  80                                 let h = host_from_expr r
  81                                 Monad.return $
  82                                         Right
  83                                          ( ty
  84                                          , h
  85                                          , text_from_expr r
  86                                          -- , (text_from_expr :: Repr_Text h -> Text) r
  87                                          )
  88
  89 tests :: TestTree
  90 tests = testGroup "Bool" $
  91  [ AST "bool" [AST "True" []] ==> Right
  92          ( type_bool
  93          , True
  94          , "True" )
  95  , AST "int" [AST "1" []] ==> Left (Proxy::Proxy Int,
  96         Error_Expr_Alt_Curr $
  97         Error_Expr_Unsupported $ AST "int" [AST "1" []])
  98  , AST "xor"
  99          [ AST "bool" [AST "True" []]
 100          , AST "bool" [AST "True" []]
 101          ] ==> Right
 102          ( type_bool
 103          , False
 104          , "xor True True" )
 105  , AST "$"
 106          [ AST "\\"
 107                  [ AST "x" []
 108                  , AST "Bool" []
 109                  , AST "var" [AST "x" []]
 110                  ]
 111          , AST "bool" [AST "True" []]
 112          ] ==> Right
 113          ( type_bool
 114          , True
 115          , "(\\x0 -> x0) True" )
 116  , let ast = AST "$"
 117          [ AST "bool" [AST "True" []]
 118          , AST "bool" [AST "True" []]
 119          ] in ast ==> Left (Proxy::Proxy Bool,
 120         Error_Expr_Alt_Curr $
 121         Error_Expr_Type_mismatch ast
 122          (Exists_Type (type_var0 SZero `type_fun` type_var0 (SSucc SZero)
 123          ::Type_Root (Type_Var0 :|: Type_Var1 :|: Type_Fun :|: Type_Bool)
 124                      ((->) Var0 Var0)))
 125          (Exists_Type type_bool))
 126  , AST "$"
 127          [ AST "\\"
 128                  [ AST "x" []
 129                  , AST "Bool" []
 130                  , AST "xor"
 131                          [ AST "var" [AST "x" []]
 132                          , AST "bool" [AST "True" []]
 133                          ]
 134                  ]
 135          , AST "bool" [AST "True" []]
 136          ] ==> Right
 137          ( type_bool
 138          , False
 139          , "(\\x0 -> xor x0 True) True" )
 140  , AST "let"
 141          [ AST "x" []
 142          , AST "bool" [AST "True" []]
 143          , AST "xor"
 144                  [ AST "var" [AST "x" []]
 145                  , AST "bool" [AST "True" []]
 146                  ]
 147          ] ==> Right
 148          ( type_bool
 149          , False
 150          , "let x0 = True in xor x0 True" )
 151  ]