t/v2dupindex: test indexing mirrors with duplicate messages

While it's not a known problem, our deduplicating logic may
change in the future; or a BOFH could be manually injecting
duplicate messages directly into the git epoch repositories.

Ensure indexing in mirrors doesn't break when there's
duplicates.  This is in preparation for detached indices
for multi-inbox search.

1 files changed, 1 insertions, 0 deletions

diff --git a/MANIFEST b/MANIFEST
index b65e96b0..44670c7e 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -357,6 +357,7 @@ t/utf8.eml
 t/v1-add-remove-add.t
 t/v1reindex.t
 t/v2-add-remove-add.t
+t/v2dupindex.t
 t/v2mda.t
 t/v2mirror.t
 t/v2reindex.t