Language/Symantic/Expr/Int/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.Int.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, (||), (+), negate)
  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_Int_Vars'
  29
  30 -- | A few boolean variables.
  31 class Sym_Int_Vars repr where
  32         x :: repr Int
  33         y :: repr Int
  34         z :: repr Int
  35 instance Sym_Int_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
  40 -- * Expressions
  41 e1 = int 1 + int 0
  42 e2 = (int 1 + int 0) + negate (int 1 + int 1)
  43 e3 = (int 1 + negate (int 0)) + (int 1 + negate (int 1))
  44 e4 = int 0 + negate (int 1)
  45 e5 = int 1 + negate x
  46 e6 = x + y
  47 e7 = (x + y) + z
  48 e8 = x + (y + int 1)
  49
  50 -- * Tests
  51 type Ex lam = Expr_Root
  52  (   Expr_Lambda_App lam
  53  .|. Expr_Lambda_Val lam
  54  .|. Expr_Int
  55  )
  56 ex_from = root_expr_from (Proxy::Proxy (Ex lam)) (Proxy::Proxy lam)
  57
  58 (==>) ast expected =
  59         testCase (show ast) $
  60         case ex_from ast of
  61          Left err -> Left err @?= snd `left` expected
  62          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  63                 case expected of
  64                  Left (_, err) -> Right ("…"::String) @?= Left err
  65                  Right (ty_expected::Type_Root_of_Expr (Ex IO) h, _::h, _::Text) ->
  66                         (>>= (@?= (\(_::Proxy h, err) -> err) `left` expected)) $
  67                         case ty `eq_type` ty_expected of
  68                          Nothing -> return $ Left $
  69                                 error_expr (Proxy::Proxy (Ex IO)) $
  70                                 Error_Expr_Type_mismatch ast
  71                                  (Exists_Type ty)
  72                                  (Exists_Type ty_expected)
  73                          Just Refl -> do
  74                                 h <- host_from_expr r
  75                                 return $
  76                                         Right
  77                                          ( ty
  78                                          , h
  79                                          , text_from_expr r
  80                                          -- , (text_from_expr :: Repr_Text IO h -> String) r
  81                                          )
  82
  83 tests :: TestTree
  84 tests = testGroup "Int" $
  85  [ AST "int" [AST "1" []] ==> Right
  86          ( type_int
  87          , 1
  88          , "1" )
  89  , AST "bool" [AST "True" []] ==> Left (Proxy::Proxy Bool,
  90         Error_Expr_Alt_Curr $
  91         Error_Expr_Unsupported $ AST "bool" [AST "True" []])
  92  , AST "+"
  93          [ AST "int" [AST "1" []]
  94          , AST "int" [AST "1" []]
  95          ] ==> Right
  96          ( type_int
  97          , 2
  98          , "1 + 1" )
  99  , let ast = AST "app"
 100          [ AST "int" [AST "1" []]
 101          , AST "int" [AST "1" []]
 102          ] in ast ==> Left (Proxy::Proxy Int,
 103         Error_Expr_Alt_Curr $
 104         Error_Expr_Type_mismatch ast
 105          (Exists_Type (type_var0 SZero `type_fun` type_var0 (SSucc SZero)
 106          ::Type_Root (Type_Var0 :|: Type_Var1 :|: Type_Fun IO :|: Type_Int)
 107                      (Lambda IO Var0 Var0)))
 108          (Exists_Type type_int))
 109  , AST "app"
 110          [ AST "val"
 111                  [ AST "x" []
 112                  , AST "Int" []
 113                  , AST "var" [AST "x" []]
 114                  ]
 115          , AST "int" [AST "1" []]
 116          ] ==> Right
 117          ( type_int
 118          , 1
 119          , "(\\x0 -> x0) 1" )
 120  , AST "app"
 121          [ AST "val"
 122                  [ AST "x" []
 123                  , AST "Int" []
 124                  , AST "+"
 125                          [ AST "var" [AST "x" []]
 126                          , AST "int" [AST "1" []]
 127                          ]
 128                  ]
 129          , AST "int" [AST "1" []]
 130          ] ==> Right
 131          ( type_int
 132          , 2
 133          , "(\\x0 -> x0 + 1) 1" )
 134  , AST "let_val"
 135          [ AST "x" []
 136          , AST "int" [AST "1" []]
 137          , AST "+"
 138                  [ AST "var" [AST "x" []]
 139                  , AST "int" [AST "1" []]
 140                  ]
 141          ] ==> Right
 142          ( type_int
 143          , 2
 144          , "let x0 = 1 in x0 + 1" )
 145  ]