ruby-net-ldap/test/test_snmp.rb

# $Id: testsnmp.rb 231 2006-12-21 15:09:29Z blackhedd $

require 'common'
require 'net/snmp'

class TestSnmp < Test::Unit::TestCase

  SnmpGetRequest = "0'\002\001\000\004\006public\240\032\002\002?*\002\001\000\002\001\0000\0160\f\006\b+\006\001\002\001\001\001\000\005\000"
  SnmpGetResponse = "0+\002\001\000\004\006public\242\036\002\002'\017\002\001\000\002\001\0000\0220\020\006\b+\006\001\002\001\001\001\000\004\004test"

  SnmpGetRequestXXX = "0'\002\001\000\004\006xxxxxx\240\032\002\002?*\002\001\000\002\001\0000\0160\f\006\b+\006\001\002\001\001\001\000\005\000"


  def setup
  end

  def teardown
  end

  def test_invalid_packet
    data = "xxxx"
    assert_raise( Net::BER::BerError ) {
ary = data.read_ber(Net::SNMP::AsnSyntax)
    }

  end

  def test_weird_packet
    assert_raise( Net::SnmpPdu::Error ) {
Net::SnmpPdu.parse("aaaaaaaaaaaaaa")
    }
  end

  def test_get_request
    data = SnmpGetRequest.dup
    pkt = data.read_ber(Net::SNMP::AsnSyntax)
    assert pkt.is_a?(Net::BER::BerIdentifiedArray)
    assert_equal( 48, pkt.ber_identifier) # Constructed [0], signifies GetRequest

    pdu = Net::SnmpPdu.parse(pkt)
    assert_equal(:get_request, pdu.pdu_type )
    assert_equal(16170, pdu.request_id ) # whatever was in the test data. 16170 is not magic.
    assert_equal( [[[1,3,6,1,2,1,1,1,0],nil]], pdu.variables )

    assert_equal( pdu.to_ber_string, SnmpGetRequest )
  end

  def test_empty_pdu
    pdu = Net::SnmpPdu.new
    assert_raise( Net::SnmpPdu::Error ) {
pdu.to_ber_string
    }
  end

  def test_malformations
    pdu = Net::SnmpPdu.new
    pdu.version = 0
    pdu.version = 2
    assert_raise( Net::SnmpPdu::Error ) {
      pdu.version = 100
    }

    pdu.pdu_type = :get_request
    pdu.pdu_type = :get_next_request
    pdu.pdu_type = :get_response
    pdu.pdu_type = :set_request
    pdu.pdu_type = :trap
    assert_raise( Net::SnmpPdu::Error ) {
      pdu.pdu_type = :something_else
    }
  end

  def test_make_response
    pdu = Net::SnmpPdu.new
    pdu.version = 0
    pdu.community = "public"
    pdu.pdu_type = :get_response
    pdu.request_id = 9999
    pdu.error_status = 0
    pdu.error_index = 0
    pdu.add_variable_binding [1,3,6,1,2,1,1,1,0], "test"

    assert_equal( SnmpGetResponse,  pdu.to_ber_string )
  end

  def test_make_bad_response
    pdu = Net::SnmpPdu.new
    assert_raise(Net::SnmpPdu::Error) {pdu.to_ber_string}
    pdu.pdu_type = :get_response
    pdu.request_id = 999
    pdu.to_ber_string
    # Not specifying variables doesn't create an error. (Maybe it should?)
  end

  def test_snmp_integers
    c32 = Net::SNMP::Counter32.new(100)
    assert_equal( "A\001d", c32.to_ber )
    g32 = Net::SNMP::Gauge32.new(100)
    assert_equal( "B\001d", g32.to_ber )
    t32 = Net::SNMP::TimeTicks32.new(100)
    assert_equal( "C\001d", t32.to_ber )
  end

  def test_community
    data = SnmpGetRequestXXX.dup
    ary = data.read_ber(Net::SNMP::AsnSyntax)
    pdu = Net::SnmpPdu.parse( ary )
    assert_equal( "xxxxxx", pdu.community )
  end

end