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-rw-r--r--src/test/test-clock.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/src/test/test-clock.c b/src/test/test-clock.c
new file mode 100644
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--- /dev/null
+++ b/src/test/test-clock.c
@@ -0,0 +1,74 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+ Copyright © 2016 Canonical Ltd.
+***/
+
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "clock-util.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "log.h"
+#include "macro.h"
+#include "tests.h"
+#include "tmpfile-util.h"
+
+TEST(clock_is_localtime) {
+ _cleanup_(unlink_tempfilep) char adjtime[] = "/tmp/test-adjtime.XXXXXX";
+ _cleanup_fclose_ FILE* f = NULL;
+
+ static const struct scenario {
+ const char* contents;
+ int expected_result;
+ } scenarios[] = {
+ /* adjtime configures UTC */
+ {"0.0 0 0\n0\nUTC\n", 0},
+ /* adjtime configures local time */
+ {"0.0 0 0\n0\nLOCAL\n", 1},
+ /* no final EOL */
+ {"0.0 0 0\n0\nUTC", 0},
+ {"0.0 0 0\n0\nLOCAL", 1},
+ /* empty value -> defaults to UTC */
+ {"0.0 0 0\n0\n", 0},
+ /* unknown value -> defaults to UTC */
+ {"0.0 0 0\n0\nFOO\n", 0},
+ /* no third line */
+ {"0.0 0 0", 0},
+ {"0.0 0 0\n", 0},
+ {"0.0 0 0\n0", 0},
+ };
+
+ /* without an adjtime file we default to UTC */
+ assert_se(clock_is_localtime("/nonexisting/adjtime") == 0);
+
+ assert_se(fmkostemp_safe(adjtime, "w", &f) == 0);
+ log_info("adjtime test file: %s", adjtime);
+
+ for (size_t i = 0; i < ELEMENTSOF(scenarios); ++i) {
+ log_info("scenario #%zu:, expected result %i", i, scenarios[i].expected_result);
+ log_info("%s", scenarios[i].contents);
+ rewind(f);
+ assert_se(ftruncate(fileno(f), 0) == 0);
+ assert_se(write_string_stream(f, scenarios[i].contents, WRITE_STRING_FILE_AVOID_NEWLINE) == 0);
+ assert_se(clock_is_localtime(adjtime) == scenarios[i].expected_result);
+ }
+}
+
+/* Test with the real /etc/adjtime */
+TEST(clock_is_localtime_system) {
+ int r;
+ r = clock_is_localtime(NULL);
+
+ if (access("/etc/adjtime", R_OK) == 0) {
+ log_info("/etc/adjtime is readable, clock_is_localtime() == %i", r);
+ /* if /etc/adjtime exists we expect some answer, no error or
+ * crash */
+ assert_se(IN_SET(r, 0, 1));
+ } else
+ /* default is UTC if there is no /etc/adjtime */
+ assert_se(r == 0 || ERRNO_IS_PRIVILEGE(r));
+}
+
+DEFINE_TEST_MAIN(LOG_INFO);