# -*- coding: utf-8 -*-
require 'pio'

describe Pio::Lldp do
  context '.new' do
    subject do
      Pio::Lldp.new(
        :dpid => dpid,
        :port_number => port_number,
        :source_mac => source_mac,
        :destination_mac => destination_mac
      )
    end

    context 'with :dpid and :port_number' do
      let(:dpid) { 0x192fa7b28d }
      let(:port_number) { 1 }
      let(:source_mac) { nil }
      let(:destination_mac) { nil }
      let(:lldp_dump) do
        [
         # Destination MAC
         0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e,
         # Source MAC
         0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
         # Ethertype
         0x88, 0xcc,
         # Chassis ID TLV
         0x02, 0x09, 0x07, 0x00, 0x00, 0x00, 0x19, 0x2f, 0xa7, 0xb2, 0x8d,
         # Port ID TLV
         0x04, 0x05, 0x07, 0x00, 0x00, 0x00, 0x01,
         # Time to live TLV
         0x06, 0x02, 0x00, 0x78,
         # End of LLDPDU TLV
         0x00, 0x00,
         # Padding
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00
        ]
      end

      context '#to_binary' do
        it 'returns an LLDP binary string' do
          expect(subject.to_binary.unpack('C*')).to eq lldp_dump
        end

        it 'returns a valid ether frame with size = 64' do
          expect(subject.to_binary.size).to eq 64
        end
      end
    end

    context 'with :dpid, :port_number and :source_mac' do
      let(:dpid) { 0x192fa7b28d }
      let(:port_number) { 1 }
      let(:source_mac) { '06:05:04:03:02:01' }
      let(:destination_mac) { nil }
      let(:lldp_dump) do
        [
         # Destination MAC
         0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e,
         # Source MAC
         0x06, 0x05, 0x04, 0x03, 0x02, 0x01,
         # Ethertype
         0x88, 0xcc,
         # Chassis ID TLV
         0x02, 0x09, 0x07, 0x00, 0x00, 0x00, 0x19, 0x2f, 0xa7, 0xb2, 0x8d,
         # Port ID TLV
         0x04, 0x05, 0x07, 0x00, 0x00, 0x00, 0x01,
         # Time to live TLV
         0x06, 0x02, 0x00, 0x78,
         # End of LLDPDU TLV
         0x00, 0x00,
         # Padding
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00
        ]
      end

      context '#to_binary' do
        it 'returns an LLDP binary string' do
          expect(subject.to_binary.unpack('C*')).to eq lldp_dump
        end

        it 'returns a valid ether frame with size = 64' do
          expect(subject.to_binary.size).to eq 64
        end
      end
    end

    context 'with :dpid, :port_number, :source_mac and :destination_mac' do
      let(:dpid) { 0x192fa7b28d }
      let(:port_number) { 1 }
      let(:source_mac) { '06:05:04:03:02:01' }
      let(:destination_mac) { '01:02:03:04:05:06' }
      let(:lldp_dump) do
        [
         # Destination MAC
         0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
         # Source MAC
         0x06, 0x05, 0x04, 0x03, 0x02, 0x01,
         # Ethertype
         0x88, 0xcc,
         # Chassis ID TLV
         0x02, 0x09, 0x07, 0x00, 0x00, 0x00, 0x19, 0x2f, 0xa7, 0xb2, 0x8d,
         # Port ID TLV
         0x04, 0x05, 0x07, 0x00, 0x00, 0x00, 0x01,
         # Time to live TLV
         0x06, 0x02, 0x00, 0x78,
         # End of LLDPDU TLV
         0x00, 0x00,
         # Padding
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00
        ]
      end

      context '#to_binary' do
        it 'returns an LLDP binary string' do
          expect(subject.to_binary.unpack('C*')).to eq lldp_dump
        end

        it 'returns a valid ether frame with size = 64' do
          expect(subject.to_binary.size).to eq 64
        end
      end
    end

    context 'when :dpid is not set' do
      let(:dpid) { nil }
      let(:port_number) { 1 }
      let(:source_mac) { nil }
      let(:destination_mac) { nil }

      it { expect { subject }.to raise_error('Invalid DPID: nil') }
    end

    context 'when :port_number is not set' do
      let(:dpid) { 0x192fa7b28d }
      let(:port_number) { nil }
      let(:source_mac) { nil }
      let(:destination_mac) { nil }

      it { expect { subject }.to raise_error('Invalid port number: nil') }
    end
  end

  context '.read' do
    subject { Pio::Lldp.read(data.pack('C*')) }

    context 'with a minimal LLDP frame' do
      let(:data) do
        [
         # Destination MAC
         0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e,
         # Source MAC
         0x00, 0x19, 0x2f, 0xa7, 0xb2, 0x8d,
         # Ethertype
         0x88, 0xcc,
         # Chassis ID TLV
         0x02, 0x07, 0x04, 0x00, 0x19, 0x2f, 0xa7, 0xb2, 0x8d,
         # Port ID TLV
         0x04, 0x0d, 0x01, 0x55, 0x70, 0x6c, 0x69, 0x6e, 0x6b, 0x20,
         0x74, 0x6f, 0x20, 0x53, 0x31,
         # Time to live TLV
         0x06, 0x02, 0x00, 0x78,
         # End of LLDPDU TLV
         0x00, 0x00
        ]
      end

      its('destination_mac.to_s') { should eq '01:80:c2:00:00:0e' }
      its('source_mac.to_s') { should eq '00:19:2f:a7:b2:8d' }
      its(:ether_type) { should eq 0x88cc }
      its(:dpid) { should eq 0x192fa7b28d }
      its('dpid.class') { should eq Fixnum }
      its(:chassis_id) { should eq 0x192fa7b28d }
      its(:port_id) { should eq 'Uplink to S1' }
      its(:port_number) { should eq 'Uplink to S1' }
      its(:ttl) { should eq 120 }
      its(:port_description) { should be_nil }
      its(:system_name) { should be_nil }
      its(:system_description) { should be_nil }
      its(:system_capabilities) { should be_nil }
      its(:management_address) { should be_nil }
    end

    context 'with a detailed LLDP frame' do
      let(:data) do
        [
         # Destination MAC
         0x01, 0x80, 0xc2, 0x00, 0x00, 0x0e,
         # Source MAC
         0x00, 0x19, 0x2f, 0xa7, 0xb2, 0x8d,
         # Ethertype
         0x88, 0xcc,
         # Chassis ID TLV
         0x02, 0x07, 0x04, 0x00, 0x19, 0x2f, 0xa7, 0xb2, 0x8d,
         # Port ID TLV
         0x04, 0x0d, 0x01, 0x55, 0x70, 0x6c, 0x69, 0x6e, 0x6b, 0x20,
         0x74, 0x6f, 0x20, 0x53, 0x31,
         # Time to live TLV
         0x06, 0x02, 0x00, 0x78,
         # Port Description
         0x08, 0x17, 0x53, 0x75, 0x6d, 0x6d, 0x69, 0x74, 0x33, 0x30,
         0x30, 0x2d, 0x34, 0x38, 0x2d, 0x50, 0x6f, 0x72, 0x74, 0x20,
         0x31, 0x30, 0x30, 0x31, 0x00,
         # System Name
         0x0a, 0x0d, 0x53, 0x75, 0x6d, 0x6d, 0x69, 0x74, 0x33, 0x30,
         0x30, 0x2d, 0x34, 0x38, 0x00,
         # System Description
         0x0c, 0x4c, 0x53, 0x75, 0x6d, 0x6d, 0x69, 0x74, 0x33, 0x30,
         0x30, 0x2d, 0x34, 0x38, 0x20, 0x2d, 0x20, 0x56, 0x65, 0x72,
         0x73, 0x69, 0x6f, 0x6e, 0x20, 0x37, 0x2e, 0x34, 0x65, 0x2e,
         0x31, 0x20, 0x28, 0x42, 0x75, 0x69, 0x6c, 0x64, 0x20, 0x35,
         0x29, 0x20, 0x62, 0x79, 0x20, 0x52, 0x65, 0x6c, 0x65, 0x61,
         0x73, 0x65, 0x5f, 0x4d, 0x61, 0x73, 0x74, 0x65, 0x72, 0x20,
         0x30, 0x35, 0x2f, 0x32, 0x37, 0x2f, 0x30, 0x35, 0x20, 0x30,
         0x34, 0x3a, 0x35, 0x33, 0x3a, 0x31, 0x31, 0x00,
         # System Capabilities
         0x0e, 0x04, 0x00, 0x14, 0x00, 0x14,
         # Management Address
         0x10, 0x0e, 0x07, 0x06, 0x00, 0x01, 0x30, 0xf9, 0xad, 0xa0,
         0x02, 0x00, 0x00, 0x03, 0xe9, 0x00,
         # Organizationally Specific
         0xfe, 0x07, 0x00, 0x12, 0x0f, 0x02, 0x07, 0x01, 0x00,
         # End of LLDPDU TLV
         0x00, 0x00
        ]
      end

      its('destination_mac.to_s') { should eq '01:80:c2:00:00:0e' }
      its('source_mac.to_s') { should eq '00:19:2f:a7:b2:8d' }
      its(:ether_type) { should eq 0x88cc }
      its(:dpid) { should eq 0x192fa7b28d }
      its(:chassis_id) { should eq 0x192fa7b28d }
      its(:port_id) { should eq 'Uplink to S1' }
      its(:port_number) { should eq 'Uplink to S1' }
      its(:ttl) { should eq 120 }
      its(:port_description) { should eq 'Summit300-48-Port 1001' }
      its(:system_name) { should eq 'Summit300-48' }
      its(:system_description) do
        should eq 'Summit300-48 - Version 7.4e.1 (Build 5) ' +
                  'by Release_Master 05/27/05 04:53:11'
      end
      its('system_capabilities.system_capabilities') { should eq 20 }
      its('system_capabilities.enabled_capabilities') { should eq 20 }
      its(:management_address) do
        should eq [0x00, 0x01, 0x30, 0xf9, 0xad, 0xa0].pack('C*')
      end
      its('organizationally_specific.oui') { should eq 4623 }
      its('organizationally_specific.subtype') { should eq 2 }
      its('organizationally_specific.information') { should eq "\a\x01" }
    end

    context 'with an invalid Lldp frame' do
      let(:data) { [] }

      it { expect { subject }.to raise_error(Pio::ParseError) }
    end
  end
end

### Local variables:
### mode: Ruby
### coding: utf-8-unix
### indent-tabs-mode: nil
### End: