[Patch v5 6/6] test: verify tag backup generated by database upgrade

[David Bremner <david@tethera.net>]

'pre upgrade dump' is not much of a test, but at least this way we get
somewhat sensible behaviour if it fails.
---
 test/T530-upgrade.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/T530-upgrade.sh b/test/T530-upgrade.sh
index d46e3d1..7a68ddf 100755
--- a/test/T530-upgrade.sh
+++ b/test/T530-upgrade.sh
@@ -25,6 +25,8 @@ test_begin_subtest "path: search does not work with old database version"
 output=$(notmuch search path:foo)
 test_expect_equal "$output" ""
 
+test_expect_success 'pre upgrade dump' 'notmuch dump | sort > pre-upgrade-dump'
+
 test_begin_subtest "database upgrade from format version 1"
 output=$(notmuch new | sed -e 's/^Backing up tags to .*$/Backing up tags to FILENAME/')
 test_expect_equal "$output" "\
@@ -34,6 +36,10 @@ Backing up tags to FILENAME
 Your notmuch database has now been upgraded to database format version 2.
 No new mail."
 
+test_begin_subtest "tag backup matches pre-upgrade dump"
+gunzip -c ${MAIL_DIR}/.notmuch/backup-*.gz | sort > backup-dump
+test_expect_equal_file pre-upgrade-dump backup-dump
+
 test_begin_subtest "folder: no longer matches in the middle of path"
 output=$(notmuch search folder:baz)
 test_expect_equal "$output" ""
-- 
1.9.0