Language/Symantic/Expr/Maybe/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.Maybe.Test where
   8
   9 import Test.Tasty
  10 import Test.Tasty.HUnit
  11
  12 import Control.Arrow (left)
  13 import Data.Proxy (Proxy(..))
  14 import Data.Text (Text)
  15 import Data.Type.Equality ((:~:)(Refl))
  16 import Prelude hiding (maybe, not)
  17
  18 import Language.Symantic.Repr
  19 import Language.Symantic.Expr
  20 import Language.Symantic.Type
  21
  22 import AST.Test
  23
  24 -- * Expressions
  25 e1 = maybe (bool True)
  26            (val not)
  27            (just $ bool True)
  28
  29 -- * Tests
  30 (==>) ast expected =
  31         testCase (show ast) $
  32         case expr_lambda_maybe_bool_from (Proxy::Proxy IO) ast of
  33          Left err -> Left err @?= snd `left` expected
  34          Right (Exists_Type_and_Repr ty (Forall_Repr r)) ->
  35                 case expected of
  36                  Left (_, err) -> Right ("…"::String) @?= Left err
  37                  Right (ty_expected::Type_Root_of_Expr (Expr_Lambda_Maybe_Bool IO) h, _::h, _::Text) ->
  38                         (>>= (@?= (\(_::Proxy h, err) -> err) `left` expected)) $
  39                         case ty `type_eq` ty_expected of
  40                          Nothing -> return $ Left $
  41                                 error_expr (Proxy::Proxy (Expr_Lambda_Maybe_Bool IO)) $
  42                                 Error_Expr_Type_mismatch ast
  43                                  (Exists_Type ty)
  44                                  (Exists_Type ty_expected)
  45                          Just Refl -> do
  46                                 h <- host_from_expr r
  47                                 return $
  48                                         Right
  49                                          ( ty
  50                                          , h
  51                                          , text_from_expr r
  52                                          -- , (text_from_expr :: Repr_String IO h -> Text) r
  53                                          )
  54
  55 tests :: TestTree
  56 tests = testGroup "Maybe"
  57  [ AST "just" [AST "bool" [AST "True" []]] ==> Right
  58          ( type_maybe type_bool
  59          , Just True
  60          , "just True" )
  61  , AST "just"
  62          [ AST "let_val"
  63                  [ AST "x" []
  64                  , AST "bool" [AST "True" []]
  65                  , AST "var" [AST "x" []]
  66                  ]
  67          ] ==> Right
  68          ( type_maybe type_bool
  69          , Just True
  70          , "just (let x0 = True in x0)" )
  71  , AST "maybe"
  72          [ AST "bool" [AST "True" []]
  73          , AST "val"
  74                  [ AST "x" []
  75                  , AST "Bool" []
  76                  , AST "not" [AST "var" [AST "x" []]]
  77                  ]
  78          , AST "nothing"
  79                  [ AST "Bool" []
  80                  ]
  81          ] ==> Right
  82          ( type_bool
  83          , True
  84          , "maybe True (\\x0 -> !x0) nothing" )
  85  , AST "maybe"
  86          [ AST "bool" [AST "False" []]
  87          , AST "val"
  88                  [ AST "x" []
  89                  , AST "Bool" []
  90                  , AST "not" [AST "var" [AST "x" []]]
  91                  ]
  92          , AST "just"
  93                  [ AST "bool" [AST "True" []]
  94                  ]
  95          ] ==> Right
  96          ( type_bool
  97          , False
  98          , "maybe False (\\x0 -> !x0) (just True)" )
  99  ]