test-sd-hwdb: add a simple test for export sd-hwdb functions

src/shared/tests.h

@@ -1,6 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1+ */
 #pragma once
 
+#include <stdbool.h>
+
 char* setup_fake_runtime_dir(void);
 const char* get_testdata_dir(void);
 const char* get_catalog_dir(void);

src/test/meson.build

@@ -661,6 +661,10 @@ tests += [
         [['src/test/test-bus-util.c'],
          [],
          []],
+
+        [['src/test/test-sd-hwdb.c'],
+         [],
+         []],
 ]
 
 ############################################################

src/test/test-sd-hwdb.c

@@ -0,0 +1,63 @@
+#include "sd-hwdb.h"
+
+#include "alloc-util.h"
+#include "errno.h"
+#include "tests.h"
+
+static void test_failed_enumerate(void) {
+        _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb;
+        const char *key, *value;
+
+        log_info("/* %s */", __func__);
+
+        assert_se(sd_hwdb_new(&hwdb) == 0);
+
+        assert_se(sd_hwdb_seek(hwdb, "no-such-modalias-should-exist") == 0);
+
+        assert_se(sd_hwdb_enumerate(hwdb, &key, &value) == 0);
+        assert_se(sd_hwdb_enumerate(hwdb, &key, NULL) == -EINVAL);
+        assert_se(sd_hwdb_enumerate(hwdb, NULL, &value) == -EINVAL);
+}
+
+#define DELL_MODALIAS \
+        "evdev:atkbd:dmi:bvnXXX:bvrYYY:bdZZZ:svnDellXXX:pnYYY"
+
+static void test_basic_enumerate(void) {
+        _cleanup_(sd_hwdb_unrefp) sd_hwdb *hwdb;
+        const char *key, *value;
+        size_t len1 = 0, len2 = 0;
+        int r;
+
+        log_info("/* %s */", __func__);
+
+        assert_se(sd_hwdb_new(&hwdb) == 0);
+
+        assert_se(sd_hwdb_seek(hwdb, DELL_MODALIAS) == 0);
+
+        for (;;) {
+                r = sd_hwdb_enumerate(hwdb, &key, &value);
+                assert(IN_SET(r, 0, 1));
+                if (r == 0)
+                        break;
+                assert(key);
+                assert(value);
+                log_debug("A: \"%s\" → \"%s\"", key, value);
+                len1 += strlen(key) + strlen(value);
+        }
+
+        SD_HWDB_FOREACH_PROPERTY(hwdb, DELL_MODALIAS, key, value) {
+                log_debug("B: \"%s\" → \"%s\"", key, value);
+                len2 += strlen(key) + strlen(value);
+        }
+
+        assert_se(len1 == len2);
+}
+
+int main(int argc, char *argv[]) {
+        test_setup_logging(LOG_DEBUG);
+
+        test_failed_enumerate();
+        test_basic_enumerate();
+
+        return 0;
+}