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| author | Lennart Poettering <lennart@poettering.net> | 2016-02-09 19:55:04 +0100 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2016-02-10 13:26:56 +0100 |
| commit | 04a1d84cefe4dbb5bfee86190489c3c07a8c238c (patch) | |
| tree | 702412b2fe4c9981386f7c8e9f1d2519e02faaf5 /src/test | |
| parent | 6bf0f408e4833152197fb38fb10a9989c89f3a59 (diff) | |
util-lib: make sure usec_sub() doesn't degrade USEC_INFINITY
As suggested in: https://github.com/systemd/systemd/pull/2542#issuecomment-181877820
Diffstat (limited to 'src/test')
| -rw-r--r-- | src/test/test-time.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/test-time.c b/src/test/test-time.c index 254a8d0e52..fdbf9fa881 100644 --- a/src/test/test-time.c +++ b/src/test/test-time.c @@ -191,6 +191,18 @@ static void test_usec_add(void) { assert_se(usec_add(USEC_INFINITY, 2) == USEC_INFINITY); } +static void test_usec_sub(void) { + assert_se(usec_sub(0, 0) == 0); + assert_se(usec_sub(4, 1) == 3); + assert_se(usec_sub(4, 4) == 0); + assert_se(usec_sub(4, 5) == 0); + assert_se(usec_sub(USEC_INFINITY-3, -3) == USEC_INFINITY); + assert_se(usec_sub(USEC_INFINITY-3, -3) == USEC_INFINITY); + assert_se(usec_sub(USEC_INFINITY-3, -4) == USEC_INFINITY); + assert_se(usec_sub(USEC_INFINITY-3, -5) == USEC_INFINITY); + assert_se(usec_sub(USEC_INFINITY, 5) == USEC_INFINITY); +} + int main(int argc, char *argv[]) { uintmax_t x; @@ -203,6 +215,7 @@ int main(int argc, char *argv[]) { test_timezone_is_valid(); test_get_timezones(); test_usec_add(); + test_usec_sub(); /* Ensure time_t is signed */ assert_cc((time_t) -1 < (time_t) 1); |