check_once_cc_ccache_get_change_time
check_once_cc_ccache_get_change_time(ccache, &last_time, ccNoError, "new ccache (change time should be > 0)");
check_once_cc_ccache_get_change_time(ccache, &last_time, ccNoError, "non-default ccache became default");
check_once_cc_ccache_get_change_time(ccache, &last_time, ccNoError, "default ccache became non-default");
check_once_cc_ccache_get_change_time(ccache, NULL, ccErrBadParam, "NULL out param for time");
check_once_cc_ccache_get_change_time(ccache, &last_time, ccNoError, "stored new credential");
check_once_cc_ccache_get_change_time(ccache, &last_time, ccErrInvalidCCache, "getting change time on destroyed ccache");
cc_int32 check_once_cc_ccache_get_change_time(cc_ccache_t ccache, cc_time_t *last_time, cc_int32 expected_err, const char *description);