check_dhcp: add test file

plugins-root/t/check_dhcp.t

@@ -0,0 +1,49 @@
+#! /usr/bin/perl -w -I ..
+#
+# DHCP Tests via check_dhcp
+#
+
+use strict;
+use Test::More;
+use NPTest;
+
+my $allow_sudo = getTestParameter( "NP_ALLOW_SUDO",
+	"If sudo is setup for this user to run any command as root ('yes' to allow)",
+	"no" );
+
+if ($allow_sudo eq "yes" or $> == 0) {
+	plan tests => 4;
+} else {
+	plan skip_all => "Need sudo to test check_dhcp";
+}
+my $sudo = $> == 0 ? '' : 'sudo';
+
+my $successOutput = '/OK: Received \d+ DHCPOFFER\(s\), \d+ of 1 requested servers responded, max lease time = \d+ sec\./';
+my $failureOutput = '/CRITICAL: Received \d+ DHCPOFFER\(s\), 0 of \d+ requested servers responded/';
+
+my $host_responsive    = getTestParameter( "NP_HOST_DHCP_RESPONSIVE",
+				"The hostname of system responsive to dhcp requests",
+				"localhost" );
+
+my $host_nonresponsive = getTestParameter( "NP_HOST_NONRESPONSIVE",
+				"The hostname of system not responsive to dhcp requests",
+				"10.0.0.1" );
+
+my $hostname_invalid   = getTestParameter( "NP_HOSTNAME_INVALID",
+                                "An invalid (not known to DNS) hostname",
+				"nosuchhost" );
+
+my $res;
+
+$res = NPTest->testCmd(
+	"$sudo ./check_dhcp -s $host_responsive"
+	);
+is( $res->return_code, 0, "Syntax ok" );
+like( $res->output, $successOutput, "Output OK" );
+
+$res = NPTest->testCmd(
+	"$sudo ./check_dhcp -s $host_nonresponsive"
+	);
+is( $res->return_code, 2, "Timeout - host nonresponsive" );
+like( $res->output, $failureOutput, "Output OK" );
+