lib/config: make values iterators restartable

This is relatively cheap, and makes it easier to transform existing
code which uses arrays of pointers to store configuration lists.

1 files changed, 32 insertions, 0 deletions

diff --git a/test/T590-libconfig.sh b/test/T590-libconfig.sh
index efbee61d..ab439078 100755
--- a/test/T590-libconfig.sh
+++ b/test/T590-libconfig.sh
@@ -224,6 +224,38 @@ EOF
 test_expect_equal_file EXPECTED OUTPUT
 restore_database
 
+test_begin_subtest "notmuch_config_get_values (restart)"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} ${NOTMUCH_CONFIG} %NULL%
+{
+    notmuch_config_values_t *values;
+    EXPECT0(notmuch_config_set (db, NOTMUCH_CONFIG_NEW_TAGS, "a;b;c"));
+    for (values = notmuch_config_get_values (db, NOTMUCH_CONFIG_NEW_TAGS);
+	 notmuch_config_values_valid (values);
+	 notmuch_config_values_move_to_next (values))
+    {
+	  puts (notmuch_config_values_get (values));
+    }
+    for (notmuch_config_values_start (values);
+	 notmuch_config_values_valid (values);
+	 notmuch_config_values_move_to_next (values))
+    {
+	  puts (notmuch_config_values_get (values));
+    }
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+a
+b
+c
+a
+b
+c
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
 backup_database
 test_begin_subtest "notmuch_config_get_values, trailing ;"
 cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} ${NOTMUCH_CONFIG} %NULL%