Language/Symantic/Expr/Eq/Test.hs

   1 {-# LANGUAGE FlexibleContexts #-}
   2 {-# LANGUAGE GADTs #-}
   3 {-# LANGUAGE NoMonomorphismRestriction #-}
   4 {-# LANGUAGE ScopedTypeVariables #-}
   5 {-# LANGUAGE TypeOperators #-}
   6 {-# OPTIONS_GHC -fno-warn-missing-signatures #-}
   7
   8 module Expr.Eq.Test where
   9
  10 import Test.Tasty
  11 import Test.Tasty.HUnit
  12
  13 import Control.Arrow (left)
  14 import Data.Proxy (Proxy(..))
  15 import Data.Text (Text)
  16 import Data.Type.Equality ((:~:)(Refl))
  17 import Prelude hiding ((&&), not, (||), (==))
  18
  19 import Language.Symantic.Type
  20 import Language.Symantic.Expr
  21 import Language.Symantic.Repr
  22
  23 import AST.Test
  24
  25 -- * Expressions
  26 t = bool True
  27 f = bool False
  28 e1 = if_ ((t && t) == (t || f)) t f
  29 e2 = if_ (((t && t) || f) == (t && (t || f))) t f
  30 e3 = if_ (not (t == f) == (t == t)) t f
  31
  32 -- * Tests
  33 type Ex lam = Expr_Root (Expr_Lambda lam .|. Expr_Bool .|. Expr_Eq)
  34 ex_from = root_expr_from (Proxy::Proxy (Ex lam)) (Proxy::Proxy lam)
  35
  36 (==>) ast expected =
  37         testCase (show ast) $
  38         case ex_from ast of
  39          Left err -> Left err @?= snd `left` expected
  40          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  41                 case expected of
  42                  Left (_, err) -> Right ("…"::String) @?= Left err
  43                  Right (ty_expected::Type_Root_of_Expr (Ex IO) h, _::h, _::Text) ->
  44                         (>>= (@?= (\(_::Proxy h, err) -> err) `left` expected)) $
  45                         case ty `type_eq` ty_expected of
  46                          Nothing -> return $ Left $
  47                                 error_expr (Proxy::Proxy (Ex IO)) $
  48                                 Error_Expr_Type_mismatch ast
  49                                  (Exists_Type ty)
  50                                  (Exists_Type ty_expected)
  51                          Just Refl -> do
  52                                 h <- host_from_expr r
  53                                 return $
  54                                         Right
  55                                          ( ty
  56                                          , h
  57                                          , text_from_expr r
  58                                          -- , (text_from_expr :: Repr_String IO h -> Text) r
  59                                          )
  60
  61 tests :: TestTree
  62 tests = testGroup "Eq"
  63  [ AST "==" [ AST "bool" [AST "True" []]
  64                   , AST "bool" [AST "True" []]
  65                   ] ==> Right
  66          ( type_bool
  67          , True
  68          , "True == True" )
  69  , AST "app"
  70          [ AST "val"
  71                  [ AST "x" []
  72                  , AST "Bool" []
  73                  , AST "==" [ AST "var" [AST "x" []]
  74                             , AST "not" [AST "var" [AST "x" []]] ]
  75                  ]
  76          , AST "bool" [AST "True" []]
  77          ] ==> Right
  78          ( type_bool
  79          , False
  80          , "(\\x0 -> x0 == !x0) True" )
  81  ]