Support disabling discovery for the LD_PRELOAD variant

When compiled with --disable-discovery, the LD_PRELOAD variant will
have automatic field discovery disabled. This does not affect the
linkable library, which always has them enabled by default.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>

1 files changed, 31 insertions, 0 deletions

diff --git a/t/test_umberlog.c b/t/test_umberlog.c
index 07b2d17..291bf43 100644
--- a/t/test_umberlog.c
+++ b/t/test_umberlog.c
@@ -15,6 +15,36 @@
 
 #include <check.h>
 
+START_TEST (test_defaults)
+{
+  char *msg;
+  struct json_object *jo;
+
+  char host[_POSIX_HOST_NAME_MAX + 1];
+
+  ul_openlog ("umberlog/test_defaults", 0, LOG_LOCAL0);
+
+  msg = ul_format (LOG_DEBUG, "hello, I'm %s!", __FUNCTION__, NULL);
+  jo = parse_msg (msg);
+  free (msg);
+
+  gethostname (host, _POSIX_HOST_NAME_MAX);
+
+  verify_value (jo, "msg", "hello, I'm test_defaults!");
+  verify_value (jo, "facility", "local0");
+  verify_value (jo, "priority", "debug");
+  verify_value (jo, "program", "umberlog/test_defaults");
+  verify_value_exists (jo, "pid");
+  verify_value_exists (jo, "uid");
+  verify_value_exists (jo, "gid");
+  verify_value_exists (jo, "timestamp");
+  verify_value (jo, "host", host);
+
+  json_object_put (jo);
+
+  ul_closelog ();
+}
+END_TEST
 
 START_TEST (test_overrides)
 {
@@ -229,6 +259,7 @@ main (void)
   s = suite_create ("Umberlog (linkable) functional testsuite");
 
   ft = tcase_create ("Basic tests");
+  tcase_add_test (ft, test_defaults);
   tcase_add_test (ft, test_overrides);
   tcase_add_test (ft, test_ul_openlog);
   tcase_add_test (ft, test_ul_openlog_flag_ignore);