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 Control.Arrow (left)
  14 -- import Data.Functor.Identity (Identity)
  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 fun) 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 lam = Expr_Root (Expr_Lambda lam .|. Expr_Bool)
  59 ex_from = root_expr_from (Proxy::Proxy (Ex lam)) (Proxy::Proxy lam)
  60
  61 (==>) ast expected =
  62         testCase (show ast) $
  63         case ex_from ast of
  64          Left err -> Left err @?= snd `left` expected
  65          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  66                 case expected of
  67                  Left (_, err) -> Right ("…"::String) @?= Left err
  68                  Right (ty_expected::Type_Root_of_Expr (Ex IO) h, _::h, _::Text) ->
  69                         (>>= (@?= (\(_::Proxy h, err) -> err) `left` expected)) $
  70                         case ty `eq_type` ty_expected of
  71                          Nothing -> return $ Left $
  72                                 error_expr (Proxy::Proxy (Ex IO)) $
  73                                 Error_Expr_Type_mismatch ast
  74                                  (Exists_Type ty)
  75                                  (Exists_Type ty_expected)
  76                          Just Refl -> do
  77                                 h <- host_from_expr r
  78                                 return $
  79                                         Right
  80                                          ( ty
  81                                          , h
  82                                          , text_from_expr r
  83                                          -- , (text_from_expr :: Repr_Text IO h -> String) r
  84                                          )
  85
  86 tests :: TestTree
  87 tests = testGroup "Bool" $
  88  [ AST "bool" [AST "True" []] ==> Right
  89          ( type_bool
  90          , True
  91          , "True" )
  92  , AST "int" [AST "1" []] ==> Left (Proxy::Proxy Int,
  93         Error_Expr_Alt_Curr $
  94         Error_Expr_Unsupported $ AST "int" [AST "1" []])
  95  , AST "xor"
  96          [ AST "bool" [AST "True" []]
  97          , AST "bool" [AST "True" []]
  98          ] ==> Right
  99          ( type_bool
 100          , False
 101          , "xor True True" )
 102  , AST "app"
 103          [ AST "val"
 104                  [ AST "x" []
 105                  , AST "Bool" []
 106                  , AST "var" [AST "x" []]
 107                  ]
 108          , AST "bool" [AST "True" []]
 109          ] ==> Right
 110          ( type_bool
 111          , True
 112          , "(\\x0 -> x0) True" )
 113  , let ast = AST "app"
 114          [ AST "bool" [AST "True" []]
 115          , AST "bool" [AST "True" []]
 116          ] in ast ==> Left (Proxy::Proxy Bool,
 117         Error_Expr_Alt_Curr $
 118         Error_Expr_Type_mismatch ast
 119          (Exists_Type (type_var SZero `type_fun` type_var (SSucc SZero)
 120          ::Type_Root (Type_Var :|: Type_Fun IO :|: Type_Bool)
 121                      (Lambda IO Zero (Succ Zero))))
 122          (Exists_Type type_bool))
 123  , AST "app"
 124          [ AST "val"
 125                  [ AST "x" []
 126                  , AST "Bool" []
 127                  , AST "xor"
 128                          [ AST "var" [AST "x" []]
 129                          , AST "bool" [AST "True" []]
 130                          ]
 131                  ]
 132          , AST "bool" [AST "True" []]
 133          ] ==> Right
 134          ( type_bool
 135          , False
 136          , "(\\x0 -> xor x0 True) True" )
 137  , AST "let_val"
 138          [ AST "x" []
 139          , AST "bool" [AST "True" []]
 140          , AST "xor"
 141                  [ AST "var" [AST "x" []]
 142                  , AST "bool" [AST "True" []]
 143                  ]
 144          ] ==> Right
 145          ( type_bool
 146          , False
 147          , "let x0 = True in xor x0 True" )
 148  ]