tasty-process

tasty-process is a library for running integration tests with the Tasty testing framework.

Features:

• Run an external process as a test case
• Supply input to stdin
• Test the process' exitcode, stdout and stderr
• Set timeout for the running process using Tasty's Timeout option
• Automatic clean up the process after the test

Example

Here is an example Echo program that reads from stdin and echos back to stdout.

module Main (main) where

main :: IO ()
main = getLine >>= putStr

And here is a test case for the Echo program using tasty-process.

import System.Exit (ExitCode (..))
import Test.Tasty (TestTree)
import Test.Tasty.Process

echoTest :: TestTree
echoTest =
  setTimeout (1000000) $ -- set timeout to 1 second
    processTest
      "Echo test" -- test name
      TestProcess
        { process =
          (proc "echo-test" []) -- process to launch with a list of arguments
        , input = "Echo!" -- input to stdin
        , exitCodeCheck = equals ExitSuccess -- check exit code
        , stdoutCheck = equals "Echo!" -- check stdout
        , stderrCheck = equals "" -- check stderr
        }

Documentation

See the Hackage page for detailed API documentation.

GHC Compatibility

tasty-process is tested with GHC version >= 8.6