+test_begin_subtest "re-close a closed db"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
+ {
+ EXPECT0(notmuch_database_close (db));
+ stat = notmuch_database_close (db);
+ printf ("%d\n", stat);
+ }
+EOF
+cat <<EOF > EXPECTED
+== stdout ==
+0
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "destroy a closed db"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
+ {
+ unsigned int version;
+ EXPECT0(notmuch_database_close (db));
+ stat = notmuch_database_destroy (db);
+ printf ("%d\n", stat);
+ }
+EOF
+cat <<EOF > EXPECTED
+== stdout ==
+0
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "destroy an open db"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
+ {
+ unsigned int version;
+ stat = notmuch_database_destroy (db);
+ printf ("%d\n", stat);
+ }
+EOF
+cat <<EOF > EXPECTED
+== stdout ==
+0
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "check a closed db for upgrade"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
+ {
+ notmuch_bool_t ret;
+
+ EXPECT0(notmuch_database_close (db));
+ ret = notmuch_database_needs_upgrade (db);
+ printf ("%d\n", ret == FALSE);
+ stat = NOTMUCH_STATUS_XAPIAN_EXCEPTION;
+ }
+EOF
+cat <<EOF > EXPECTED
+== stdout ==
+1
+== stderr ==
+A Xapian exception occurred at lib/database.cc:XXX: Database has been closed
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "upgrade a closed db"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
+ {
+ notmuch_bool_t ret;
+
+ EXPECT0(notmuch_database_close (db));
+ stat = notmuch_database_upgrade (db, NULL, NULL);
+ printf ("%d\n", ret == NOTMUCH_STATUS_SUCCESS);
+ }
+EOF
+cat <<EOF > EXPECTED
+== stdout ==
+1
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+