#
# Author:: Stafford Brunk (<stafford.brunk@gmail.com>)
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

require 'ipaddress'
require 'spec_helper'
require 'ohai/util/ip_helper'

class IpHelperMock
  include Ohai::Util::IpHelper
end

describe "Ohai::Util::IpHelper" do
  let(:ip_helper) { IpHelperMock.new }

  shared_examples 'ip address types' do
    context 'with an IPv4 address' do
      context 'that is private' do
        let(:address) { '10.128.142.89' }

        it 'identifies the address as private' do
          expect(ip_helper.private_address?(address)).to be_truthy
        end
      end

      context 'that is public' do
        let(:address) { '74.125.224.72' }

        it 'identifies the address as public' do
          expect(ip_helper.private_address?(address)).to be_falsey
        end
      end
    end

    context 'with an IPv6 address' do
      context 'that is an RFC 4193 unique local address' do
        let(:address) { 'fdf8:f53b:82e4::53' }

        it 'identifies the address as a unique local address' do
          expect(ip_helper.private_address?(address)).to be_truthy
        end
      end

      context 'that is a RFC 4291 Link-Local unicast address' do
        let(:address) { 'FE80::0202:B3FF:FE1E:8329' }

        it 'does identify the address as a link-local address' do
          expect(ip_helper.private_address?(address)).to be_truthy
        end
      end
    end
  end

  describe 'private_address?' do
    include_examples 'ip address types'
  end

  describe 'unique_local_address?' do
    include_examples 'ip address types'
  end

  describe 'public_address?' do
    let(:address) { '10.128.142.89' }

    before do
      allow(ip_helper).to receive(:private_address?)
    end

    it 'should call #private_address?' do
      expect(ip_helper).to receive(:private_address?)
      ip_helper.public_address?(address)
    end

    it 'should return the inverse of #private_address?' do
      expect(ip_helper.public_address?(address)).to equal !ip_helper.private_address?(address)
    end
  end

  describe 'loopback?' do
    context 'with an IPv4 address' do
      context 'that is a loopback address' do
        let(:address) { '127.0.0.1' }

        it 'should identify the address as a loopback address' do
          expect(ip_helper.loopback?(address)).to be_truthy
        end
      end

      context 'that is not a loopback address' do
        let(:address) { '1.2.3.4' }

        it 'should not identify the address as a loopback address' do
          expect(ip_helper.loopback?(address)).to be_falsey
        end
      end
    end

    context 'with an IPv6 address' do
      context 'that is a loopback address' do
        let(:address) { '0:0:0:0:0:0:0:1' }

        it 'should identify the address as a loopback address' do
          expect(ip_helper.loopback?(address)).to be_truthy
        end
      end

      context 'that is not a loopback address' do
        let(:address) { '2400:6180:0000:00D0:0000:0000:0009:7001' }

        it 'should not identify the address as a loopback address' do
          expect(ip_helper.loopback?(address)).to be_falsey
        end
      end
    end
  end
end
