Add parallel and distributed tests

Add '-rtsopts' to compilation flags. The tests should be run with:
  ./OrbitTests +RTS -Ksize -RTS
where 'size' is something like 256m.

Makefile

@@ -4,7 +4,7 @@ orbit: FORCE
 		ghc -Wall --make Bench.hs -main-is Bench -o orbit
 
 tests: orbit
-	        ghc -Wall -threaded Tests.hs -o OrbitTests
+	        ghc -Wall -rtsopts -threaded Tests.hs -o OrbitTests
 
 clean:
 		$(RM) *.swp *~ *.hi *.o

Tests.hs

+module Main where
+
 import           Control.Concurrent.MVar               (MVar, putMVar,
                                                         newEmptyMVar, takeMVar)
 import           Control.Distributed.Process
@@ -11,7 +13,8 @@ import           Test.Framework.Providers.HUnit        (testCase)
 import           Test.HUnit                            (Assertion)
 import           Test.HUnit.Base                       (assertBool)
 
-import           Bench                                 (seq)
+import           Bench                                 (seq, par, par_seq,
+                                                        dist, dist_seq)
 import           MasterWorker                          (__remoteTable)
 import           Utils
 
@@ -32,10 +35,74 @@ testSeqLong result = do
     x <- seq gg1245 157
     stash result x
 
+-- Parallel Tests
+
+testParShort :: TestResult String -> Process ()
+testParShort result = do
+    x <- par gg13 11 2
+    stash result x
+
+testParIntermediate :: TestResult String -> Process ()
+testParIntermediate result = do
+    x <- par gg124 157 2
+    stash result x
+
+testParLong :: TestResult String -> Process ()
+testParLong result = do
+    x <- par gg1245 157 2
+    stash result x
+
+testParSeqShort :: TestResult String -> Process ()
+testParSeqShort result = do
+    x <- par_seq gg13 11 2
+    stash result x
+
+testParSeqIntermediate :: TestResult String -> Process ()
+testParSeqIntermediate result = do
+    x <- par_seq gg124 157 2
+    stash result x
+
+testParSeqLong :: TestResult String -> Process ()
+testParSeqLong result = do
+    x <- par_seq gg1245 157 2
+    stash result x
+
+-- Distributed Tests
+
+testDistShort :: [NodeId] -> TestResult String -> Process ()
+testDistShort nodes result = do
+    x <- dist gg13 11 2 nodes
+    stash result x
+
+testDistIntermediate :: [NodeId] -> TestResult String -> Process ()
+testDistIntermediate nodes result = do
+    x <- dist gg124 157 2 nodes
+    stash result x
+
+testDistLong :: [NodeId] -> TestResult String -> Process ()
+testDistLong nodes result = do
+    x <- dist gg1245 157 2 nodes
+    stash result x
+
+testDistSeqShort :: [NodeId] -> TestResult String -> Process ()
+testDistSeqShort nodes result = do
+    x <- dist_seq gg13 11 2 nodes
+    stash result x
+
+testDistSeqIntermediate :: [NodeId] -> TestResult String -> Process ()
+testDistSeqIntermediate nodes result = do
+    x <- dist_seq gg124 157 2 nodes
+    stash result x
+
+testDistSeqLong :: [NodeId] -> TestResult String -> Process ()
+testDistSeqLong nodes result = do
+    x <- dist_seq gg1245 157 2 nodes
+    stash result x
+
 -- Batch the tests
 
-tests :: LocalNode  -> [Test]
-tests localNode = [
+tests :: [LocalNode]  -> [Test]
+tests (localNode : localNodes) = [
       testGroup "Sequential Tests" [
             testCase "testSeqShort"
               (delayedAssertion "short" localNode "{size,10}" testSeqShort)
@@ -44,6 +111,40 @@ tests localNode = [
           , testCase "testSeqLong"
               (delayedAssertion "long" localNode "{size,134}" testSeqLong)
         ]
+    , testGroup "Parallel Tests" [
+            testCase "testParSeqShort"
+              (delayedAssertion "short" localNode "{size,10}" testParSeqShort)
+          , testCase "testParSeqIntermediate"
+              (delayedAssertion "intermediate" localNode "{size,133}" testParSeqIntermediate)
+          , testCase "testParSeqLong"
+              (delayedAssertion "long" localNode "{size,134}" testParSeqLong)
+          , testCase "testParShort"
+              (delayedAssertion "short" localNode "{size,10}" testParShort)
+          , testCase "testParIntermediate"
+              (delayedAssertion "intermediate" localNode "{size,133}" testParIntermediate)
+          , testCase "testParLong"
+              (delayedAssertion "long" localNode "{size,134}" testParLong)
+        ]
+    , testGroup "Distributed Tests" [
+            testCase "testDistSeqShort"
+              (delayedAssertion "short" localNode "{size,10}" $
+                testDistSeqShort (map localNodeId localNodes))
+          , testCase "testDistSeqIntermediate"
+              (delayedAssertion "intermediate" localNode "{size,133}" $
+                testDistSeqIntermediate (map localNodeId localNodes))
+          , testCase "testDistSeqLong"
+              (delayedAssertion "long" localNode "{size,134}" $
+                testDistSeqLong (map localNodeId localNodes))
+          , testCase "testDistShort"
+              (delayedAssertion "short" localNode "{size,10}" $
+                testDistShort (map localNodeId localNodes))
+          , testCase "testDistIntermediate"
+              (delayedAssertion "intermediate" localNode "{size,133}" $
+                testDistIntermediate (map localNodeId localNodes))
+          , testCase "testDistLong"
+              (delayedAssertion "long" localNode "{size,134}" $
+                testDistLong (map localNodeId localNodes))
+       ]
   ]
 
 -- Run the tests
@@ -51,7 +152,9 @@ tests localNode = [
 orbitTests :: NT.Transport -> IO [Test]
 orbitTests transport = do
     localNode  <- newLocalNode transport rtable
-    let testData = tests localNode
+    localNode2 <- newLocalNode transport rtable
+    localNode3 <- newLocalNode transport rtable
+    let testData = tests [localNode, localNode2, localNode3]
     return testData
   where rtable :: RemoteTable
         rtable = MasterWorker.__remoteTable initRemoteTable