52 lines
1.4 KiB
Haskell
52 lines
1.4 KiB
Haskell
module TestCommon where
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import Data.Text (Text, unpack)
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import Nix
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import Nix.Monad.Lazy
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import Nix.Parser
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import Nix.Pretty
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import Nix.Value
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import System.Environment
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import System.IO
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import System.Posix.Files
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import System.Posix.Temp
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import System.Process
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import Test.Tasty.HUnit
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hnixEvalFile :: FilePath -> IO (NValueNF (Lazy IO))
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hnixEvalFile file = do
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parseResult <- parseNixFileLoc file
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case parseResult of
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Failure err ->
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error $ "Parsing failed for file `" ++ file ++ "`.\n" ++ show err
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Success expression -> do
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setEnv "TEST_VAR" "foo"
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evalLoc (Just file) expression
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hnixEvalText :: Text -> IO (NValueNF (Lazy IO))
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hnixEvalText expr = case parseNixText expr of
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Failure err ->
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error $ "Parsing failed for expressien `"
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++ unpack expr ++ "`.\n" ++ show err
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Success expression -> eval Nothing expression
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nixEvalString :: String -> IO String
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nixEvalString expr = do
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(fp,h) <- mkstemp "nix-test-eval"
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hPutStr h expr
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hClose h
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res <- nixEvalFile fp
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removeLink fp
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return res
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nixEvalFile :: FilePath -> IO String
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nixEvalFile fp = readProcess "nix-instantiate" ["--eval", fp] ""
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assertEvalMatchesNix :: Text -> Assertion
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assertEvalMatchesNix expr = do
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hnixVal <- (++"\n") . printNix <$> hnixEvalText expr
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nixVal <- nixEvalString expr'
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assertEqual expr' nixVal hnixVal
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where
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expr' = unpack expr
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