Fix tests and update NEWS file

NEWS

@@ -22,6 +22,7 @@ This file documents the major additions and syntax changes between releases.
 	Fix compilation error of pst3 in Solaris 8
 	Fix check_radius returning OK on unexpected results (Craig Leres - #2911752)
 	Fix translations when extra-opts aren't enabled (Jan Wagner - #2832884)
+	Fix parsing of multi-line strings in check_snmp (broken in 1.4.14) and enhance output in such case (#2832451)
 	WARNINGS
 	Updated developer documentation to say that performance labels should not have an equals sign or
 	single quote in the label

plugins/tests/check_snmp.t

@@ -8,8 +8,18 @@ use Test::More;
 use NPTest;
 use FindBin qw($Bin);
 
+# Check that all dependent modules are available
+eval {
+	require NetSNMP::OID;
+	require NetSNMP::agent;
+	require NetSNMP::ASN;
+};
+
+if ($@) {
+	plan skip_all => "Missing required module for test: $@";
+}
+
 my $port_snmp = 16100 + int(rand(100));
-my $running = 1;
 
 
 # Start up server
@@ -41,7 +51,7 @@ if ($ARGV[0] && $ARGV[0] eq "-d") {
 	}
 }
 
-my $tests = 3;
+my $tests = 9;
 if (-x "./check_snmp") {
 	plan tests => $tests;
 } else {
@@ -53,11 +63,46 @@ my $res;
 $res = NPTest->testCmd( "./check_snmp -H 127.0.0.1 -C public -p $port_snmp -o .1.3.6.1.4.1.8072.3.2.67.0");
 cmp_ok( $res->return_code, '==', 0, "Exit OK when querying a multi-line string" );
 like($res->output, '/^SNMP OK - /', "String contains SNMP OK");
-like($res->output, '/'.quotemeta('SNMP OK - "Cisco Internetwork Operating System SoftwareIOS (tm) Catalyst 4000 L3 Switch Software (cat4000-I9K91S-M), Version
+like($res->output, '/'.quotemeta('SNMP OK - Cisco Internetwork Operating System Software | 
+.1.3.6.1.4.1.8072.3.2.67.0:
+"Cisco Internetwork Operating System Software
+IOS (tm) Catalyst 4000 \"L3\" Switch Software (cat4000-I9K91S-M), Version
 12.2(20)EWA, RELEASE SOFTWARE (fc1)
 Technical Support: http://www.cisco.com/techsupport
 Copyright (c) 1986-2004 by cisco Systems, Inc.
 "').'/m', "String contains all lines");
 
-print $res->output;
+# sysContact.0 is "Alice" (from our snmpd.conf)
+$res = NPTest->testCmd( "./check_snmp -H 127.0.0.1 -C public -p $port_snmp -o .1.3.6.1.4.1.8072.3.2.67.0 -o sysContact.0 -o .1.3.6.1.4.1.8072.3.2.67.1");
+cmp_ok( $res->return_code, '==', 0, "Exit OK when querying multi-line OIDs" );
+like($res->output, '/^SNMP OK - /', "String contains SNMP OK");
+like($res->output, '/'.quotemeta('SNMP OK - Cisco Internetwork Operating System Software Alice Kisco Outernetwork Oserating Gystem Totware | 
+.1.3.6.1.4.1.8072.3.2.67.0:
+"Cisco Internetwork Operating System Software
+IOS (tm) Catalyst 4000 \"L3\" Switch Software (cat4000-I9K91S-M), Version
+12.2(20)EWA, RELEASE SOFTWARE (fc1)
+Technical Support: http://www.cisco.com/techsupport
+Copyright (c) 1986-2004 by cisco Systems, Inc.
+"
+.1.3.6.1.4.1.8072.3.2.67.1:
+"Kisco Outernetwork Oserating Gystem Totware
+Copyleft (c) 2400-2689 by kisco Systrems, Inc."').'/m', "String contains all lines with multiple OIDs");
+
+$res = NPTest->testCmd( "./check_snmp -H 127.0.0.1 -C public -p $port_snmp -o .1.3.6.1.4.1.8072.3.2.67.2");
+like($res->output, '/'.quotemeta('SNMP OK - This should not confuse check_snmp \"parser\" | 
+.1.3.6.1.4.1.8072.3.2.67.2:
+"This should not confuse check_snmp \"parser\"
+into thinking there is no 2nd line"').'/m', "Attempt to confuse parser No.1");
+
+$res = NPTest->testCmd( "./check_snmp -H 127.0.0.1 -C public -p $port_snmp -o .1.3.6.1.4.1.8072.3.2.67.3");
+like($res->output, '/'.quotemeta('SNMP OK - It\'s getting even harder if the line | 
+.1.3.6.1.4.1.8072.3.2.67.3:
+"It\'s getting even harder if the line
+ends with with this: C:\\\\"').'/m', "Attempt to confuse parser No.2");
+
+$res = NPTest->testCmd( "./check_snmp -H 127.0.0.1 -C public -p $port_snmp -o .1.3.6.1.4.1.8072.3.2.67.4");
+like($res->output, '/'.quotemeta('SNMP OK - And now have fun with with this: \"C:\\\\\" | 
+.1.3.6.1.4.1.8072.3.2.67.4:
+"And now have fun with with this: \"C:\\\\\"
+because we\'re not done yet!"').'/m', "Attempt to confuse parser No.3");