gistfile1.rb

  newproperty(:mode) do
    desc "Set trunking mode of the interface."
    defaultto(:undef)
    newvalues(:undef, :access, :dot1q, :dynamic, :private, :trunk)
  end

  newproperty(:trunk_native_vlan) do
    desc "Set native VLAN when interface is in trunking mode"
    defaultto(:undef)
    newvalues(:undef, /^\d+$/)

    validate do |value|
      if resource.value(:mode) == :trunk and value == :undef
        raise ArgumentError, "Must set native vlan if mode is trunk"
      elsif resource.value(:mode) != :trunk and value != :undef
        raise ArgumentError, "May only be set if mode is trunk"
      end

      self.class.value_collection.validate(value)
    end
  end