Language/LOL/Symantic/Expr/Int/Test.hs

   1 {-# LANGUAGE FlexibleContexts #-}
   2 {-# LANGUAGE GADTs #-}
   3 {-# LANGUAGE NoMonomorphismRestriction #-}
   4 {-# LANGUAGE Rank2Types #-}
   5 {-# LANGUAGE ScopedTypeVariables #-}
   6 {-# OPTIONS_GHC -fno-warn-missing-signatures #-}
   7 module Expr.Int.Test where
   8
   9 import Test.Tasty
  10 import Test.Tasty.HUnit
  11
  12 import Control.Arrow (left)
  13 -- import Data.Functor.Identity (Identity)
  14 -- import Control.Monad.IO.Class (MonadIO(..))
  15 import Data.Proxy (Proxy(..))
  16 import Data.Type.Equality ((:~:)(Refl))
  17 import Prelude hiding (and, not, or)
  18
  19 import Language.LOL.Symantic.Repr
  20 import Language.LOL.Symantic.AST
  21 import Language.LOL.Symantic.Expr
  22 import Language.LOL.Symantic.Type
  23 -- import Language.LOL.Symantic.Trans
  24
  25 -- * Class 'Sym_Int_Vars'
  26
  27 -- | A few boolean variables.
  28 class Sym_Int_Vars repr where
  29         x :: repr Int
  30         y :: repr Int
  31         z :: repr Int
  32 instance Sym_Int_Vars (Repr_String fun) where
  33         x = Repr_String $ \_p _v -> "x"
  34         y = Repr_String $ \_p _v -> "y"
  35         z = Repr_String $ \_p _v -> "z"
  36
  37 -- * Expressions
  38 e1 = int 1 `add` int 0
  39 e2 = (int 1 `add` int 0) `add` neg (int 1 `add` int 1)
  40 e3 = (int 1 `add` neg (int 0)) `add` (int 1 `add` neg (int 1))
  41 e4 = int 0 `add` neg (int 1)
  42 e5 = int 1 `add` neg x
  43 e6 = x `add` y
  44 e7 = (x `add` y) `add` z
  45 e8 = x `add` (y `add` int 1)
  46
  47 -- * Tests
  48 (==>) ast expected =
  49         testCase (show ast) $
  50         case expr_lambda_int_from (Proxy::Proxy IO) ast of
  51          Left err -> Left err @?= snd `left` expected
  52          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  53                 case expected of
  54                  Left (_, err) -> Right ("…"::String) @?= Left err
  55                  Right (ty_expected::Type_Root_of_Expr (Expr_Lambda_Int IO) h, _::h, _::String) ->
  56                         (>>= (@?= (\(_::Proxy h, err) -> err) `left` expected)) $
  57                         case ty `type_eq` ty_expected of
  58                          Nothing -> return $ Left $
  59                                 error_expr (Proxy::Proxy (Expr_Lambda_Int IO)) $
  60                                 Error_Expr_Type_mismatch ast
  61                                  (Exists_Type ty)
  62                                  (Exists_Type ty_expected)
  63                          Just Refl -> do
  64                                 h <- host_from_expr r
  65                                 return $
  66                                         Right
  67                                          ( ty
  68                                          , h
  69                                          , string_from_expr r
  70                                          -- , (string_from_expr :: Repr_String IO h -> String) r
  71                                          )
  72
  73 tests :: TestTree
  74 tests = testGroup "Int" $
  75  [ AST "int" [AST "1" []] ==> Right
  76          ( type_int
  77          , 1
  78          , "1" )
  79  , AST "bool" [AST "True" []] ==> Left (Proxy::Proxy Bool,
  80         Error_Expr_Alt_Curr $
  81         Error_Expr_Unsupported $ AST "bool" [AST "True" []])
  82  , AST "add"
  83          [ AST "int" [AST "1" []]
  84          , AST "int" [AST "1" []]
  85          ] ==> Right
  86          ( type_int
  87          , 2
  88          , "1 + 1" )
  89  , let ast = AST "app"
  90          [ AST "int" [AST "1" []]
  91          , AST "int" [AST "1" []]
  92          ] in ast ==> Left (Proxy::Proxy Int,
  93         Error_Expr_Alt_Curr $
  94         Error_Expr_Type_mismatch ast
  95          (Exists_Type (type_var SZero `type_fun` type_var (SSucc SZero)
  96          ::Type_Fun_Int IO (IO Zero -> IO (Succ Zero))))
  97          (Exists_Type type_int))
  98  , AST "app"
  99          [ AST "val"
 100                  [ AST "x" []
 101                  , AST "Int" []
 102                  , AST "var" [AST "x" []]
 103                  ]
 104          , AST "int" [AST "1" []]
 105          ] ==> Right
 106          ( type_int
 107          , 1
 108          , "(\\x0 -> x0) 1" )
 109  , AST "app"
 110          [ AST "val"
 111                  [ AST "x" []
 112                  , AST "Int" []
 113                  , AST "add"
 114                          [ AST "var" [AST "x" []]
 115                          , AST "int" [AST "1" []]
 116                          ]
 117                  ]
 118          , AST "int" [AST "1" []]
 119          ] ==> Right
 120          ( type_int
 121          , 2
 122          , "(\\x0 -> x0 + 1) 1" )
 123  , AST "let_val"
 124          [ AST "x" []
 125          , AST "int" [AST "1" []]
 126          , AST "add"
 127                  [ AST "var" [AST "x" []]
 128                  , AST "int" [AST "1" []]
 129                  ]
 130          ] ==> Right
 131          ( type_int
 132          , 2
 133          , "let x0 = 1 in x0 + 1" )
 134  ]