Language/Symantic/Expr/Functor/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.Functor.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 Data.Proxy (Proxy(..))
  16 import Data.Text (Text)
  17 import Data.Type.Equality ((:~:)(Refl))
  18 import Prelude hiding ((&&), not, (||), (==), fmap, (+))
  19
  20 import Language.Symantic.Type
  21 import Language.Symantic.Expr as Expr
  22 import Language.Symantic.Repr
  23
  24 import AST.Test
  25
  26 -- * Expressions
  27 t = bool True
  28 f = bool False
  29 e1 = fmap (lam $ \x -> x + int 1) (list $ int Prelude.<$> [1..3])
  30
  31 -- * Tests
  32 type Ex = Expr_Root
  33  (   Expr_Lambda
  34  .|. Expr_Maybe
  35  .|. Expr_List
  36  .|. Expr_Functor
  37  .|. Expr_Int
  38  .|. Expr_Bool
  39  )
  40 ex_from = root_expr_from (Proxy::Proxy Ex)
  41
  42 (==>) ast expected =
  43         testCase (show ast) $
  44         case ex_from ast of
  45          Left err -> Left err @?= Prelude.snd `Arrow.left` expected
  46          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  47                 case expected of
  48                  Left (_, err) -> Right ("…"::String) @?= Left err
  49                  Right (ty_expected::Type_Root_of_Expr Ex h, _::h, _::Text) ->
  50                         (Monad.>>= (@?= (\(_::Proxy h, err) -> err) `Arrow.left` expected)) $
  51                         case ty `eq_type` ty_expected of
  52                          Nothing -> Monad.return $ Left $
  53                                 error_expr (Proxy::Proxy Ex) $
  54                                 Error_Expr_Type_mismatch ast
  55                                  (Exists_Type ty)
  56                                  (Exists_Type ty_expected)
  57                          Just Refl -> do
  58                                 let h = host_from_expr r
  59                                 Monad.return $
  60                                         Right
  61                                          ( ty
  62                                          , h
  63                                          , text_from_expr r
  64                                          -- , (text_from_expr :: Repr_Text h -> Text) r
  65                                          )
  66
  67 tests :: TestTree
  68 tests = testGroup "Functor"
  69  [ AST "fmap"
  70          [ AST "\\"
  71                  [ AST "x" []
  72                  , AST "Int" []
  73                  , AST "+" [ AST "var" [AST "x" []]
  74                            , AST "int" [AST "1" []] ]
  75                  ]
  76          , AST "list"
  77                  [ AST "Int" []
  78                  , AST "int" [AST "1" []]
  79                  , AST "int" [AST "2" []]
  80                  , AST "int" [AST "3" []]
  81                  ]
  82          ] ==> Right
  83          ( type_list type_int
  84          , [2,3,4]
  85          , "fmap (\\x0 -> x0 + 1) [1, 2, 3]" )
  86  ]