1 files changed, 19 insertions, 0 deletions

diff --git a/server/src/Thermoprint/Server/Queue.hs b/server/src/Thermoprint/Server/Queue.hs
index cc87886..3c8fb9e 100644
--- a/server/src/Thermoprint/Server/Queue.hs
+++ b/server/src/Thermoprint/Server/Queue.hs
@@ -46,6 +46,11 @@ import           Data.Foldable
 import           Data.Monoid
 import           Data.Ord
 
+import Test.QuickCheck.Arbitrary (Arbitrary(..), CoArbitrary(..))
+import Test.QuickCheck.Gen (Gen, scale)
+import Test.QuickCheck.Instances
+import Test.QuickCheck.Modifiers
+
 -- | Zipper for 'Seq QueueEntry' with additional support for 'PrintingError' in the section after point
 data Queue = Queue
   { pending :: Seq QueueEntry -- ^ Pending jobs, closest last
@@ -54,6 +59,14 @@ data Queue = Queue
   }
   deriving (Typeable, Generic, NFData, Show)
 
+instance Arbitrary Queue where
+  arbitrary = Queue
+    <$> scale (`div` 2) arbitrary
+    <*> arbitrary
+    <*> scale (`div` 2) arbitrary
+
+instance CoArbitrary Queue
+
 class HasQueue a where
   extractQueue :: a -> TVar Queue
 
@@ -73,6 +86,12 @@ data QueueEntry = QueueEntry
   }
   deriving (Typeable, Generic, NFData, Eq, Ord, Show)
 
+instance Arbitrary QueueEntry where
+  arbitrary = QueueEntry <$> (fromIntegral . getNonNegative <$> (arbitrary :: Gen (NonNegative Integer))) <*> arbitrary
+
+instance CoArbitrary QueueEntry where
+  coarbitrary QueueEntry{..} = coarbitrary created . coarbitrary (fromIntegral jobId :: Integer)
+
 data QueueItem = Pending Int QueueEntry | Current QueueEntry | History Int QueueEntry (Maybe PrintingError)
 
 instance Eq QueueItem where