Add tests for tupleConcat

Author: Antoine Brunner

tests/run/tuple-tests.check

@@ -0,0 +1,9 @@
+()
+(1,2,3,4,5)
+(1,2,3,4,5)
+(11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35)
+(11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35)
+(1,2,3,4,5,6,7,8,9,10)
+(1,2,3,4,5,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35)
+(11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,1,2,3,4,5)
+(11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60)

tests/run/tuple-tests/tuple-concat.check

@@ -16,8 +16,15 @@ object Test extends App {
   // small + xxl
   // xxl + small
   // xxl + xxl
-  println(tuple1 ++ emptyTuple)
+  println(emptyTuple ++ emptyTuple)
   println(emptyTuple ++ tuple1)
+  println(tuple1 ++ emptyTuple)
+  println(tupleXXL1 ++ emptyTuple)
+  println(emptyTuple ++ tupleXXL1)
+  println(tuple1 ++ tuple2)
+  println(tuple1 ++ tupleXXL1)
+  println(tupleXXL1 ++ tuple1)
+  println(tupleXXL1 ++ tupleXXL2)
 
   // Concatenation with an empty tuple should be a no-op
   assert((tuple1 ++ emptyTuple).asInstanceOf[AnyRef] eq tuple1.asInstanceOf[AnyRef])