TestPretty.hs

{-# LANGUAGE OverloadedStrings #-}

-- | Swarm unit tests
module TestPretty where

import Swarm.Language.Pretty
import Swarm.Language.Syntax hiding (mkOp)
import Test.Tasty
import Test.Tasty.HUnit

testPrettyConst :: TestTree
testPrettyConst =
  testGroup
    "Language - pretty"
    [ testCase
        "operators #8 - function application unchanged"
        ( equalPretty "f say" $
            TApp (TVar "f") (TConst Say)
        )
    , testCase
        "operators #8 - double function application unchanged"
        ( equalPretty "f () ()" $
            TApp (TApp (TVar "f") TUnit) TUnit
        )
    , testCase
        "operators #8 - embrace operator parameter"
        ( equalPretty "f (==)" $
            TApp (TVar "f") (TConst Eq)
        )
    , testCase
        "operators #8 - unary negation"
        ( equalPretty "-3" $
            TApp (TConst Neg) (TInt 3)
        )
    , testCase
        "operators #8 - double unary negation"
        ( equalPretty "-(-1)" $
            TApp (TConst Neg) $ TApp (TConst Neg) (TInt 1)
        )
    , testCase
        "operators #8 - unary negation with strongly fixing binary operator"
        ( equalPretty "-1 ^ (-2)" $
            TApp (TConst Neg) $ mkOp' Exp (TInt 1) $ TApp (TConst Neg) (TInt 2)
        )
    , testCase
        "operators #8 - unary negation with weakly fixing binary operator"
        ( equalPretty "-(1 + -2)" $
            TApp (TConst Neg) $ mkOp' Add (TInt 1) $ TApp (TConst Neg) (TInt 2)
        )
    , testCase
        "operators #8 - simple infix operator"
        ( equalPretty "1 == 2" $
            mkOp' Eq (TInt 1) (TInt 2)
        )
    , testCase
        "operators #8 - infix operator with less fixing inner operator"
        ( equalPretty "1 * (2 + 3)" $
            mkOp' Mul (TInt 1) (mkOp' Add (TInt 2) (TInt 3))
        )
    , testCase
        "operators #8 - infix operator with more fixing inner operator"
        ( equalPretty "1 + 2 * 3" $
            mkOp' Add (TInt 1) (mkOp' Mul (TInt 2) (TInt 3))
        )
    , testCase
        "operators #8 - infix operator right associativity"
        ( equalPretty "2 ^ 4 ^ 8" $
            mkOp' Exp (TInt 2) (mkOp' Exp (TInt 4) (TInt 8))
        )
    , testCase
        "operators #8 - infix operator right associativity not applied to left"
        ( equalPretty "(2 ^ 4) ^ 8" $
            mkOp' Exp (mkOp' Exp (TInt 2) (TInt 4)) (TInt 8)
        )
    , testCase
        "pairs #225 - nested pairs are printed right-associative"
        ( equalPretty "(1, 2, 3)" $
            TPair (TInt 1) (TPair (TInt 2) (TInt 3))
        )
    ]
 where
  equalPretty :: String -> Term -> Assertion
  equalPretty expected term = assertEqual "" expected . show $ ppr term