check_snmp: refactoring + fixes

This commit moves the state retention logic to check_snmp as it is only
used there and I do not want it to be used at all, so it doesn't get a
place in the lib.

Otherwise this adapts tests and fixes the rate computing in the
refactored version of check_snmp.
Also fixes some bugs detected with the tests

1 files changed, 6 insertions, 0 deletions

diff --git a/plugins/tests/test_check_snmp.t b/plugins/tests/test_check_snmp.t
new file mode 100755
index 00000000..967633e9
--- /dev/null
+++ b/plugins/tests/test_check_snmp.t
@@ -0,0 +1,6 @@
+#!/usr/bin/perl
+use Test::More;
+if (! -e "./test_check_snmp") {
+        plan skip_all => "./test_check_snmp not compiled - please enable libtap library to test";
+}
+exec "./test_check_snmp";