.

wcfs/internal/xbtree/δbtail_test.go

@@ -1455,6 +1455,8 @@ func TestΔBTail(t *testing.T) {
 
 	// test known cases going through tree1 -> tree2 -> ...
 	testv := []interface{} {
+		// XXX add test where kadj does not grow to -oo,oo (start from several buckets)
+
 		// start from non-empty tree to verify both ->empty and empty-> transitions
 		"T/B1:a,2:b",
 
@@ -1541,13 +1543,12 @@ func TestΔBTail(t *testing.T) {
 		"T2,5,8/B1:a-B2:b,3:c-B5:e,6:f-B8:h,9:i",
 
 		// depth=2; bucket split; +3 in new bucket; left T remain
-		// _unchanged_ even though B under it is modified; right arm is
-		// added to tracking set because 2 migrates there.
+		// _unchanged_ even though B under it is modified.
 		"T/T/B1:a,2:b",
 		Δ("T2/T-T/B1:a-B2:b,3:c",
-			A{1:  K(1,2,3),
-			  2:  K(1,2,3),
-			  3:  K(1,2,3),
+			A{1:  K(1,2,3,oo),
+			  2:  K(1,2,3,oo),
+			  3:  K(1,2,3,oo),
 			  oo: K(1,2,3,oo)}),
 
 		// depth=2; like prev. case, but additional right arm with +4