# encoding: utf-8

describe ServiceObjects::Invalid do

  let(:messages) { double :messages }
  let(:object)   { double :object, messages: messages }

  subject { described_class.new object }

  describe ".new" do

    context "without arguments" do

      subject { described_class.new }

      it "fails with ArgumentError" do
        expect { subject }.to raise_error ArgumentError
      end
    end

    context "with an object that doesn't responds to :messages" do

      let(:object) { double }
      subject { described_class.new object }

      it "fails with TypeError" do
        expect { subject }.to raise_error TypeError
      end

      it "returns a proper message" do
        begin
          subject
        rescue => err
          expect(err.message)
            .to eq "#{ object.inspect } doesn't respond to #messages"
        end
      end
    end

    context "with an object that responds to :messages" do

      it "doesn't fail" do
        expect { subject }.not_to raise_error
      end

      it "initializes a RuntimeError" do
        expect(subject).to be_kind_of RuntimeError
      end
    end
  end

  describe "#object" do

    it "is initialized" do
      expect(subject.object).to eq object
    end
  end

  describe "#messages" do

    it "returns an array" do
      expect(subject.messages).to be_kind_of Array
    end

    it "is delegated to the #object" do
      expect(subject.messages).to contain_exactly object.messages
    end
  end
end