--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-rebase-brute-force.t	Sun Aug 06 11:40:53 2017 -0700
@@ -0,0 +1,55 @@
+  $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > drawdag=$TESTDIR/drawdag.py
+  > bruterebase=$TESTDIR/bruterebase.py
+  > [experimental]
+  > evolution=createmarkers,allowunstable
+  > EOF
+  $ init() {
+  >   N=`expr ${N:-0} + 1`
+  >   cd $TESTTMP && hg init repo$N && cd repo$N
+  >   hg debugdrawdag
+  > }
+
+Source looks like "N"
+
+  $ init <<'EOS'
+  > C D
+  > |\|
+  > A B Z
+  > EOS
+
+  $ hg debugbruterebase 'all()-Z' Z
+     A: A':Z
+     B: B':Z
+    AB: A':Z B':Z
+     C: ABORT: cannot use revision 3 as base, result would have 3 parents
+    AC: A':Z C':A'B
+    BC: B':Z C':B'A
+   ABC: A':Z B':Z C':A'B'
+     D: D':Z
+    AD: A':Z D':Z
+    BD: B':Z D':B'
+   ABD: A':Z B':Z D':B'
+    CD: CRASH: revlog index out of range
+   ACD: A':Z C':A'A' D':Z
+   BCD: B':Z C':B'A D':B'
+  ABCD: A':Z B':Z C':A'B' D':B'
+
+Moving backwards
+
+  $ init <<'EOS'
+  > C
+  > |\
+  > A B
+  > |
+  > Z
+  > EOS
+  $ hg debugbruterebase 'all()-Z' Z
+    B: B':Z
+    A: 
+   BA: B':Z
+    C: ABORT: cannot use revision 3 as base, result would have 3 parents
+   BC: B':Z C':B'A
+   AC: 
+  BAC: ABORT: nothing to merge