* [PATCH v2] tst: Provide test for ctime
@ 2021-01-25 9:56 Lukasz Majewski
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From: Lukasz Majewski @ 2021-01-25 9:56 UTC (permalink / raw)
To: Joseph Myers, Adhemerval Zanella, Florian Weimer
Cc: Paul Eggert, Alistair Francis, Arnd Bergmann, Alistair Francis,
GNU C Library, Carlos O'Donell, Florian Weimer,
Zack Weinberg, Lukasz Majewski
This change adds new test to assess ctime's functionality.
To be more specific - following use cases are checked:
- Pass time_t value as 0 to check if epoch time is converted
- Pass time_t as max value for 32 bit systems
- Pass time_t as the first value after Y2038 threshold
Changes for v2:
- Add setting of TZ env variable
---
time/Makefile | 2 +-
time/tst-ctime.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 57 insertions(+), 1 deletion(-)
create mode 100644 time/tst-ctime.c
diff --git a/time/Makefile b/time/Makefile
index 43e5821adc..486fb02ecb 100644
--- a/time/Makefile
+++ b/time/Makefile
@@ -51,7 +51,7 @@ tests := test_time clocktest tst-posixtz tst-strptime tst_wcsftime \
tst-clock tst-clock2 tst-clock_nanosleep tst-cpuclock1 \
tst-adjtime tst-clock-y2038 tst-clock2-y2038 \
tst-cpuclock1-y2038 tst-clock_nanosleep-y2038 tst-clock_settime \
- tst-clock_adjtime
+ tst-clock_adjtime tst-ctime
include ../Rules
diff --git a/time/tst-ctime.c b/time/tst-ctime.c
new file mode 100644
index 0000000000..cd2ec889ea
--- /dev/null
+++ b/time/tst-ctime.c
@@ -0,0 +1,56 @@
+/* Test for ctime
+ Copyright (C) 2021 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <time.h>
+#include <stdlib.h>
+#include <support/check.h>
+
+static int
+do_test (void)
+{
+ char *str;
+ time_t t;
+
+ /* Set time zone for the test. */
+ TEST_VERIFY_EXIT (setenv ("TZ", "Europe/Warsaw", 1) == 0);
+ tzset ();
+
+ /* Check if the epoch time can be converted. */
+ t = 0;
+ str = ctime (&t);
+ TEST_COMPARE_STRING (str, "Thu Jan 1 00:00:00 1970\n");
+
+ /* Check if the max time value for 32 bit time_t can be converted. */
+ t = 0x7fffffff;
+ str = ctime (&t);
+ TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:07 2038\n");
+
+ /* Check if the time is converted after 32 bit time_t overflow. */
+ if (sizeof (time_t) > 4)
+ {
+ t++;
+ str = ctime (&t);
+ TEST_COMPARE_STRING (str, "Tue Jan 19 03:14:08 2038\n");
+ }
+ else
+ FAIL_UNSUPPORTED ("32-bit time_t");
+
+ return 0;
+}
+
+#include <support/test-driver.c>
--
2.20.1
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