+backup_database
+test_begin_subtest "override config from file"
+notmuch config set test.key1 overridden
+cat c_head - c_tail <<'EOF' | test_C ${MAIL_DIR} ${NOTMUCH_CONFIG}
+{
+ 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
+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 \${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 ${ovconfig}
+NOTMUCH_CONFIG=${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 ${ovconfig}
+NOTMUCH_CONFIG=${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 ${ovconfig}
+NOTMUCH_CONFIG=${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 ${ovconfig}
+NOTMUCH_CONFIG=${old_NOTMUCH_CONFIG}
+cat <<'EOF' >EXPECTED
+== stdout ==
+test.key1 = overridden-profile
+test.key2 = testvalue2
+== stderr ==
+EOF
+test_expect_equal_file EXPECTED OUTPUT
+restore_database
+