require "spec_helper"

describe PostPresenter do
  before do
    @sm = FactoryGirl.create(:status_message, public: true)
    @sm_with_poll = FactoryGirl.create(:status_message_with_poll, public: true)
    @presenter = PostPresenter.new(@sm, bob)
    @unauthenticated_presenter = PostPresenter.new(@sm)
  end

  it "takes a post and an optional user" do
    expect(@presenter).not_to be_nil
  end

  describe "#as_json" do
    it "works with a user" do
      expect(@presenter.as_json).to be_a Hash
    end

    it "works without a user" do
      expect(@unauthenticated_presenter.as_json).to be_a Hash
    end
  end

  describe "#user_like" do
    it "includes the users like" do
      bob.like!(@sm)
      expect(@presenter.send(:user_like)).to be_present
    end

    it "is nil if the user is not authenticated" do
      expect(@unauthenticated_presenter.send(:user_like)).to be_nil
    end
  end

  describe "#user_reshare" do
    it "includes the users reshare" do
      bob.reshare!(@sm)
      expect(@presenter.send(:user_reshare)).to be_present
    end

    it "is nil if the user is not authenticated" do
      expect(@unauthenticated_presenter.send(:user_reshare)).to be_nil
    end
  end

  describe "#root" do
    it "does not raise if the absolute_root does not exists" do
      first_reshare = FactoryGirl.create :reshare
      first_reshare.root = nil
      reshare = FactoryGirl.create :reshare, root: first_reshare

      expect {
        PostPresenter.new(reshare).send(:root)
      }.to_not raise_error
    end

    it "does not raise if the root does not exists" do
      reshare = FactoryGirl.create :reshare
      reshare.root = nil
      expect {
        PostPresenter.new(reshare).send(:root)
      }.to_not raise_error
    end
  end

  describe "#title" do
    context "with posts with text" do
      it "delegates to message.title" do
        message = double(present?: true)
        expect(message).to receive(:title)
        @presenter.post = double(message: message)
        @presenter.send(:title)
      end
    end

    context "with posts without text" do
      it "displays a messaage with the post class" do
        @sm = double(message: double(present?: false), author: bob.person, author_name: bob.person.name)
        @presenter.post = @sm
        expect(@presenter.send(:title)).to eq("A post from #{@sm.author.name}")
      end
    end
  end

  describe "#poll" do
    it "works without a user" do
      presenter = PostPresenter.new(@sm_with_poll)
      expect(presenter.as_json).to be_a(Hash)
    end
  end

  describe "#tags" do
    it "returns the tag of the post" do
      post = FactoryGirl.create(:status_message, text: "#hello #world", public: true)

      expect(PostPresenter.new(post).send(:tags)).to match_array(%w(hello world))
    end

    it "returns the tag of the absolute_root of a Reshare" do
      post = FactoryGirl.create(:status_message, text: "#hello #world", public: true)
      first_reshare = FactoryGirl.create(:reshare, root: post)
      second_reshare = FactoryGirl.create(:reshare, root: first_reshare)

      expect(PostPresenter.new(second_reshare).send(:tags)).to match_array(%w(hello world))
    end

    it "does not raise if the root of a reshare does not exist anymore" do
      reshare = FactoryGirl.create(:reshare)
      reshare.root = nil

      expect(PostPresenter.new(reshare).send(:tags)).to eq([])
    end
  end

  describe "#description" do
    it "returns the first 1000 chars of the text" do
      post = FactoryGirl.create(:status_message, text: "a" * 1001, public: true)

      expect(PostPresenter.new(post).send(:description)).to eq("#{'a' * 997}...")
    end

    it "does not change the message if less or equal 1000 chars" do
      post = FactoryGirl.create(:status_message, text: "a" * 1000, public: true)

      expect(PostPresenter.new(post).send(:description)).to eq("a" * 1000)
    end

    it "does not raise if the root of a reshare does not exist anymore" do
      reshare = FactoryGirl.create(:reshare)
      reshare.root = nil

      expect(PostPresenter.new(reshare).send(:description)).to eq(nil)
    end
  end
end