[libvirt] [PATCH 2/2] qemuxml2argvtest: Set timezone

[Michal Privoznik]

With my recent work on the test, both time() and localtime() are used.
While mocking the former one, we get predictible result for UTC. But
since the latter function uses timezone to get local time, the result of
localtime() is not so predictive. Therefore, we must set the TZ variable
at the beginning of the test. To be able to catch some things that work
just by a blind chance, I'm choosing an exotic timezone that (hopefully)
no libvirt developer resides in.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 .../qemuxml2argv-clock-localtime-basis-localtime.args         |  2 +-
 tests/qemuxml2argvtest.c                                      | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/tests/qemuxml2argvdata/qemuxml2argv-clock-localtime-basis-localtime.args b/tests/qemuxml2argvdata/qemuxml2argv-clock-localtime-basis-localtime.args
index 24fe89c..7d39125 100644
--- a/tests/qemuxml2argvdata/qemuxml2argv-clock-localtime-basis-localtime.args
+++ b/tests/qemuxml2argvdata/qemuxml2argv-clock-localtime-basis-localtime.args
@@ -1,5 +1,5 @@
 LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test QEMU_AUDIO_DRV=none \
 /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic \
--monitor unix:/tmp/test-monitor,server,nowait -rtc base=2009-02-14T01:31:30 \
+-monitor unix:/tmp/test-monitor,server,nowait -rtc base=2009-02-13T13:31:30 \
 -no-acpi -boot c -usb -hda /dev/HostVG/QEMUGuest1 -net none -serial none \
 -parallel none
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index c8b3857..1ee4b59 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -486,6 +486,17 @@ mymain(void)
     if (!abs_top_srcdir)
         abs_top_srcdir = abs_srcdir "/..";
 
+    /* Set the timezone because we are mocking the time() function.
+     * If we don't do that, then localtime() may return unpredictable
+     * results. In order to detect things that just work by a blind
+     * chance, we need to set an exotic timezone that none libvirt
+     * developer resides in. So if you go for holiday to Niue, don't
+     * send patches but enjoy time off! */
+    if (setenv("TZ", "Pacific/Niue", 1) < 0) {
+        perror("setenv");
+        return EXIT_FAILURE;
+    }
+
     driver.config = virQEMUDriverConfigNew(false);
     VIR_FREE(driver.config->spiceListen);
     VIR_FREE(driver.config->vncListen);
-- 
1.8.5.3