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