+backup_database
+test_begin_subtest "get config by key"
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} ${NOTMUCH_CONFIG}
+{
+ printf("before = %s\n", notmuch_config_get (db, NOTMUCH_CONFIG_SYNC_MAILDIR_FLAGS));
+ EXPECT0(notmuch_database_set_config (db, "maildir.synchronize_flags", "false"));
+ printf("after = %s\n", notmuch_config_get (db, NOTMUCH_CONFIG_SYNC_MAILDIR_FLAGS));
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+before = true
+after = false
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
+backup_database
+test_begin_subtest "set config by key"
+notmuch config set test.key1 overridden
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} ${NOTMUCH_CONFIG}
+{
+ printf("before = %s\n", notmuch_config_get (db, NOTMUCH_CONFIG_SYNC_MAILDIR_FLAGS));
+ EXPECT0(notmuch_config_set (db, NOTMUCH_CONFIG_SYNC_MAILDIR_FLAGS, "false"));
+ printf("after = %s\n", notmuch_config_get (db, NOTMUCH_CONFIG_SYNC_MAILDIR_FLAGS));
+}
+EOF
+cat <<'EOF' >EXPECTED
+== stdout ==
+before = true
+after = false
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
+test_begin_subtest "load default values"
+export MAILDIR=${MAIL_DIR}
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} '' %NULL%
+{
+ notmuch_config_key_t key;
+ for (key = NOTMUCH_CONFIG_FIRST;
+ key < NOTMUCH_CONFIG_LAST;
+ key = (notmuch_config_key_t)(key + 1)) {
+ const char *val = notmuch_config_get (db, key);
+ printf("%02d: '%s'\n", key, val ? val : "NULL" );
+ }
+}
+EOF
+
+_libconfig_sanitize < OUTPUT > OUTPUT.clean
+
+cat <<'EOF' >EXPECTED
+== stdout ==
+00: 'MAIL_DIR'
+01: 'MAIL_DIR'
+02: 'MAIL_DIR/.notmuch/hooks'
+03: 'MAIL_DIR/.notmuch/backups'
+04: ''
+05: 'unread;inbox'
+06: ''
+07: 'true'
+08: 'USERNAME@localhost'
+09: 'NULL'
+10: 'USER_FULL_NAME'
+11: '8000'
+== stderr ==
+EOF
+unset MAILDIR
+test_expect_equal_file EXPECTED OUTPUT.clean
+
+backup_database
+test_begin_subtest "override config from \${NOTMUCH_CONFIG}"
+notmuch config set test.key1 overridden
+# second argument omitted to make argv[2] == NULL
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR}
+{
+ EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+ printf("test.key1 = %s\n", val);
+ EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+ printf("test.key2 = %s\n", val);
+}
+EOF
+notmuch config set test.key1
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = overridden
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
+backup_database
+test_begin_subtest "override config from \${HOME}/.notmuch-config"
+ovconfig=${HOME}/.notmuch-config
+cp ${NOTMUCH_CONFIG} ${ovconfig}
+old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
+unset NOTMUCH_CONFIG
+notmuch --config=${ovconfig} config set test.key1 overridden-home
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} %NULL% %NULL%
+{
+ EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+ printf("test.key1 = %s\n", val);
+ EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+ printf("test.key2 = %s\n", val);
+}
+EOF
+rm -f ${ovconfig}
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = overridden-home
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
+backup_database
+test_begin_subtest "override config from \${XDG_CONFIG_HOME}/notmuch"
+ovconfig=${HOME}/.config/notmuch/default/config
+mkdir -p $(dirname ${ovconfig})
+cp ${NOTMUCH_CONFIG} ${ovconfig}
+old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
+unset NOTMUCH_CONFIG
+notmuch --config=${ovconfig} config set test.key1 overridden-xdg
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} %NULL% %NULL%
+{
+ EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+ printf("test.key1 = %s\n", val);
+ EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+ printf("test.key2 = %s\n", val);
+}
+EOF
+rm -f ${ovconfig}
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = overridden-xdg
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
+backup_database
+test_begin_subtest "override config from \${XDG_CONFIG_HOME}/notmuch with profile"
+ovconfig=${HOME}/.config/notmuch/work/config
+mkdir -p $(dirname ${ovconfig})
+cp ${NOTMUCH_CONFIG} ${ovconfig}
+old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
+unset NOTMUCH_CONFIG
+notmuch --config=${ovconfig} config set test.key1 overridden-xdg-profile
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} %NULL% work
+{
+ EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+ printf("test.key1 = %s\n", val);
+ EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+ printf("test.key2 = %s\n", val);
+}
+EOF
+rm -f ${ovconfig}
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = overridden-xdg-profile
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
+backup_database
+test_begin_subtest "override config from \${HOME}/.notmuch-config.work (via args)"
+ovconfig=${HOME}/.notmuch-config.work
+cp ${NOTMUCH_CONFIG} ${ovconfig}
+old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
+unset NOTMUCH_CONFIG
+notmuch --config=${ovconfig} config set test.key1 overridden-profile
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} %NULL% work
+{
+ EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+ printf("test.key1 = %s\n", val);
+ EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+ printf("test.key2 = %s\n", val);
+}
+EOF
+#rm -f ${ovconfig}
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = overridden-profile
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+
+test_begin_subtest "no config, fail to open database"
+old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
+unset NOTMUCH_CONFIG
+cat c_head - c_tail <<'EOF' | test_C %NULL% '' %NULL%
+{
+ printf("NOT RUN");
+}
+EOF
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+cat <<'EOF' >EXPECTED
+== stdout ==
+== stderr ==
+error opening database
+No database found
+Error: could not locate database.
+
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "open database from NOTMUCH_DATABASE"
+old_NOTMUCH_CONFIG=${NOTMUCH_CONFIG}
+unset NOTMUCH_CONFIG
+export NOTMUCH_DATABASE=${MAIL_DIR}
+cat c_head - c_tail <<'EOF' | test_C %NULL% '' %NULL%
+{
+ EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+ printf("test.key1 = %s\n", val);
+ EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+ printf("test.key2 = %s\n", val);
+}
+EOF
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+unset NOTMUCH_DATABASE
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = testvalue1
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+
+test_begin_subtest "NOTMUCH_DATABASE overrides config"
+cp notmuch-config notmuch-config.bak
+notmuch config set database.path /nonexistent
+export NOTMUCH_DATABASE=${MAIL_DIR}
+cat c_head - c_tail <<'EOF' | test_C %NULL% '' %NULL%
+{
+ EXPECT0(notmuch_database_get_config (db, "test.key1", &val));
+ printf("test.key1 = %s\n", val);
+ EXPECT0(notmuch_database_get_config (db, "test.key2", &val));
+ printf("test.key2 = %s\n", val);
+}
+EOF
+export NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+unset NOTMUCH_DATABASE
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = testvalue1
+test.key2 = testvalue2
+== stderr ==
+EOF
+cp notmuch-config.bak notmuch-config
+test_expect_equal_file EXPECTED OUTPUT
+
+cat <<EOF > c_head2
+#include <string.h>
+#include <stdlib.h>
+#include <notmuch-test.h>