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module Test (
Test(..),
TestStep(..),
SourceLine(..),
ProcName(..), textProcName, unpackProcName,
NodeName(..), textNodeName, unpackNodeName,
MonadEval(..),
VarName(..), textVarName, unpackVarName,
ExprType(..),
SomeVarValue(..), fromSomeVarValue, textSomeVarValue,
Expr(..), eval, gatherVars,
Regex,
) where
import Control.Monad
import Data.Char
import Data.List
import Data.Text (Text)
import qualified Data.Text as T
import Data.Typeable
import Text.Regex.TDFA
import Text.Regex.TDFA.Text
import Process
import Util
data Test = Test
{ testName :: Text
, testSteps :: [TestStep]
}
data TestStep = forall a. ExprType a => Let SourceLine VarName (Expr a)
| Spawn ProcName NodeName
| Send ProcName (Expr Text)
| Expect SourceLine ProcName (Expr Regex) [VarName]
| Guard SourceLine (Expr Bool)
| Wait
newtype SourceLine = SourceLine Text
newtype NodeName = NodeName Text
deriving (Eq, Ord)
textNodeName :: NodeName -> Text
textNodeName (NodeName name) = name
unpackNodeName :: NodeName -> String
unpackNodeName (NodeName tname) = T.unpack tname
class MonadFail m => MonadEval m where
lookupVar :: VarName -> m SomeVarValue
data VarName = VarName [Text]
deriving (Eq, Ord)
textVarName :: VarName -> Text
textVarName (VarName name) = T.concat $ intersperse (T.singleton '.') name
unpackVarName :: VarName -> String
unpackVarName = T.unpack . textVarName
class Typeable a => ExprType a where
textExprType :: proxy a -> Text
textExprValue :: a -> Text
emptyVarValue :: a
instance ExprType Integer where
textExprType _ = T.pack "integer"
textExprValue x = T.pack (show x)
emptyVarValue = 0
instance ExprType Text where
textExprType _ = T.pack "string"
textExprValue x = T.pack (show x)
emptyVarValue = T.empty
instance ExprType Bool where
textExprType _ = T.pack "bool"
textExprValue True = T.pack "true"
textExprValue False = T.pack "false"
emptyVarValue = False
data SomeVarValue = forall a. ExprType a => SomeVarValue a
fromSomeVarValue :: forall a m. (ExprType a, MonadFail m) => VarName -> SomeVarValue -> m a
fromSomeVarValue name (SomeVarValue value) = maybe (fail err) return $ cast value
where err = T.unpack $ T.concat [ T.pack "expected ", textExprType @a Proxy, T.pack ", but variable '", textVarName name, T.pack "' has type ", textExprType (Just value) ]
textSomeVarValue :: SomeVarValue -> Text
textSomeVarValue (SomeVarValue value) = textExprValue value
data Expr a where
Variable :: ExprType a => VarName -> Expr a
Literal :: ExprType a => a -> Expr a
Concat :: [Expr Text] -> Expr Text
Regex :: [Expr Text] -> Expr Regex
UnOp :: (b -> a) -> Expr b -> Expr a
BinOp :: (b -> c -> a) -> Expr b -> Expr c -> Expr a
eval :: MonadEval m => Expr a -> m a
eval (Variable name) = fromSomeVarValue name =<< lookupVar name
eval (Literal value) = return value
eval (Concat xs) = T.concat <$> mapM eval xs
eval (Regex xs) = do
parts <- forM xs $ \case
Literal value | Just str <- cast value -> return str
| otherwise -> fail $ "regex expansion not defined for " ++ T.unpack (textExprType $ Just value)
expr -> T.concatMap escapeChar <$> eval expr
where
escapeChar c | isAlphaNum c = T.singleton c
| c `elem` "`'<>" = T.singleton c
| otherwise = T.pack ['\\', c]
case compile defaultCompOpt defaultExecOpt $ T.concat $ concat [[T.singleton '^'], parts, [T.singleton '$']] of
Left err -> fail err
Right re -> return re
eval (UnOp f x) = f <$> eval x
eval (BinOp f x y) = f <$> eval x <*> eval y
gatherVars :: forall a m. MonadEval m => Expr a -> m [(VarName, SomeVarValue)]
gatherVars = fmap (uniqOn fst . sortOn fst) . helper
where
helper :: forall b. Expr b -> m [(VarName, SomeVarValue)]
helper (Variable var) = (:[]) . (var,) <$> lookupVar var
helper (Literal _) = return []
helper (Concat es) = concat <$> mapM helper es
helper (Regex es) = concat <$> mapM helper es
helper (UnOp _ e) = helper e
helper (BinOp _ e f) = (++) <$> helper e <*> helper f
|