Fix Tests When Compiling Without ALSA

Use CPP macros to make the ALSA Spec file a no-op when the `with_alsa`
flag is set to False. Without these macros, HSpec will import the
AlsaSpec module causing test compilation to fail.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/Xmobar/Plugins/Monitors/AlsaSpec.hs b/test/Xmobar/Plugins/Monitors/AlsaSpec.hs
index 14810dd..70beda1 100644
--- a/test/Xmobar/Plugins/Monitors/AlsaSpec.hs
+++ b/test/Xmobar/Plugins/Monitors/AlsaSpec.hs
@@ -1,9 +1,12 @@
 {-# OPTIONS_GHC -Wall #-}
+{-# LANGUAGE CPP #-}
+
 module Xmobar.Plugins.Monitors.AlsaSpec
   ( main
   , spec
   ) where
 
+#ifdef ALSA
 import Control.Concurrent
 import Control.Concurrent.Async
 import Control.Monad
@@ -158,3 +161,11 @@ withFifoWriteHandle fifoPath body = do
       $ \(Just h) _ _ _ -> do
         hSetBuffering h LineBuffering
         body h
+#else
+-- These No-Op values are required for HSpec's test discovery.
+main :: IO ()
+main = return ()
+
+spec :: Monad m => m ()
+spec = return ()
+#endif