diff -r f8dee1a8f844 -r 4a02cf4fbb2e tests/test-bookmarks-merge.t
--- a/tests/test-bookmarks-merge.t	Sun May 13 11:54:58 2012 +0200
+++ b/tests/test-bookmarks-merge.t	Sun May 13 11:55:42 2012 +0200
@@ -29,3 +29,65 @@
   $ hg bookmarks
      b                         1:d2ae7f538514
    * c                         3:b8f96cf4688b
+
+  $ hg up -C 3
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ echo d > d
+  $ hg add d
+  $ hg commit -m'd'
+
+  $ hg up -C 3
+  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ echo e > e
+  $ hg add e
+  $ hg commit -m'e'
+  created new head
+  $ hg up -C 5
+  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg bookmark e
+  $ hg bookmarks
+     b                         1:d2ae7f538514
+     c                         3:b8f96cf4688b
+   * e                         5:26bee9c5bcf3
+
+# the picked side is bookmarked
+
+  $ hg up -C 4
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg merge
+  abort: heads are bookmarked - please merge with an explicit rev
+  (run 'hg heads' to see all heads)
+  [255]
+
+# our revision is bookmarked
+
+  $ hg up -C e
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ hg merge
+  abort: no matching bookmark to merge - please merge with an explicit rev or bookmark
+  (run 'hg heads' to see all heads)
+  [255]
+
+# merge bookmark heads
+
+  $ hg up -C 4
+  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
+  $ echo f > f
+  $ hg commit -Am "f"
+  adding f
+  $ hg up -C e
+  1 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  $ hg bookmarks -r 4 "e@diverged"
+  $ hg bookmarks
+     b                         1:d2ae7f538514
+     c                         3:b8f96cf4688b
+   * e                         5:26bee9c5bcf3
+     e@diverged                4:a0546fcfe0fb
+  $ hg merge
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ hg commit -m'merge'
+  $ hg bookmarks
+     b                         1:d2ae7f538514
+     c                         3:b8f96cf4688b
+   * e                         7:ca784329f0ba