.

wcfs/internal/xbtree_test.py

@@ -41,7 +41,7 @@ Bv = lambda keyv, *valuev: xbtree.Bucket(keyv, valuev)
 
 # buildDegenerateZTree builds ztree with known degenerate topology, see:
 # https://github.com/zopefoundation/ZODB/commit/6cd24e99f89b
-# https://github.com/zopefoundation/BTrees/blob/4.7.2-1-g078ba60/BTrees/tests/testBTrees.py#L20
+# https://github.com/zopefoundation/BTrees/blob/4.7.2-1-g078ba60/BTrees/tests/testBTrees.py#L20-L57
 def buildDegenerateZTree():
     ztree, keys = testBTrees.DegenerateBTree("testBasicOps")._build_degenerate_tree()
     assert keys == [1, 3, 5, 7, 11]

wcfs/δbtail_test.go

@@ -27,7 +27,7 @@ package main
 // Av, Bv - topologies with values	ex T/B1:a  T2/B1:b-B3:c
 //
 // δ(Av, Bv) - full diff {k -> v} for changed keys; DEL = k -> ø
-//             ex δ(T/B1:a, T2/B1:b-B3:c) = {1:a 3:c}
+//             ex δ(T/B1:a, T2/B1:b-B3:c) = {1:b 3:c}		XXX include "was" value too?
 //
 // Δ(T, Av, Bv) - subset of δ(Av, Bv) corresponding to initial tracking set T
 //             ex Δ({1}, T/B1:a, T2/B1:b-B3:c) = {1:b}  (no 3:c)
@@ -759,7 +759,7 @@ func testΔBTail(t *testing.T, testq chan ΔBTestEntry) {
 	}
 }
 
-// Verify ΔBTail for explicitly provided tree topologies.
+// TestΔBTail verifies ΔBTail for explicitly provided tree topologies.
 func TestΔBTail(t *testing.T) {
 	// K is shorthand for SetKey
 	K := func(keyv ...Key) SetKey {
@@ -780,15 +780,16 @@ func TestΔBTail(t *testing.T) {
 
 	// test known cases going through tree1 -> tree2 -> ...
 	testv := []interface{} {
-		// XXX the same issue as vvv but with depth=2
-		"T1,2/T-T-T/B0:a-B1:b-B2:c,3:d",
-		"T1/T-T/B0:e-B1:b,2:f",
 		// found by AllStructs ([1] is not changed, but because B1 is
 		// unlinked and 1 migrates to othe bucket, changes in that
 		// other bucket must be included into δT)
 		"T1,2/B0:e-B1:d-B2:g,3:a",
 		"T1/B0:d-B1:d,2:d",
 
+		// XXX the same issue as ^^^ but with depth=2
+		"T1,2/T-T-T/B0:a-B1:b-B2:c,3:d",
+		"T1/T-T/B0:e-B1:b,2:f",
+
 		"T2/B1:a-B7:g", "T2,8/B1:a-B7:g-B9:i",
 
 		"T2/B1:a-B2:b", "T/B1:a,2:b",
@@ -947,7 +948,7 @@ func TestΔBTail(t *testing.T) {
 
 }
 
-// Verify ΔBtail on tree topologies generated by AllStructs.
+// TestΔBTreeAllStructs verifies ΔBtail on tree topologies generated by AllStructs.
 func TestΔBTreeAllStructs(t *testing.T) {
 	X := exc.Raiseif