require 'spec_helper'

describe GroupTree do
  let(:group) { create(:group, :public) }
  let(:user) { create(:user) }

  controller(ApplicationController) do
    # `described_class` is not available in this context
    include GroupTree # rubocop:disable RSpec/DescribedClass

    def index
      render_group_tree GroupsFinder.new(current_user).execute
    end
  end

  before do
    group.add_owner(user)
    sign_in(user)
  end

  describe 'GET #index' do
    it 'filters groups' do
      other_group = create(:group, name: 'filter')
      other_group.add_owner(user)

      get :index, params: { filter: 'filt' }, format: :json

      expect(assigns(:groups)).to contain_exactly(other_group)
    end

    context 'for subgroups', :nested_groups do
      it 'only renders root groups when no parent was given' do
        create(:group, :public, parent: group)

        get :index, format: :json

        expect(assigns(:groups)).to contain_exactly(group)
      end

      it 'contains only the subgroup when a parent was given' do
        subgroup = create(:group, :public, parent: group)

        get :index, params: { parent_id: group.id }, format: :json

        expect(assigns(:groups)).to contain_exactly(subgroup)
      end

      it 'allows filtering for subgroups and includes the parents for rendering' do
        subgroup = create(:group, :public, parent: group, name: 'filter')

        get :index, params: { filter: 'filt' }, format: :json

        expect(assigns(:groups)).to contain_exactly(group, subgroup)
      end

      it 'does not include groups the user does not have access to' do
        parent = create(:group, :private)
        subgroup = create(:group, :private, parent: parent, name: 'filter')
        subgroup.add_developer(user)
        _other_subgroup = create(:group, :private, parent: parent, name: 'filte')

        get :index, params: { filter: 'filt' }, format: :json

        expect(assigns(:groups)).to contain_exactly(parent, subgroup)
      end

      it 'preloads parents regardless of pagination' do
        allow(Kaminari.config).to receive(:default_per_page).and_return(1)
        group = create(:group, :public)
        subgroup = create(:group, :public, parent: group)
        search_result = create(:group, :public, name: 'result', parent: subgroup)

        get :index, params: { filter: 'resu' }, format: :json

        expect(assigns(:groups)).to contain_exactly(group, subgroup, search_result)
      end
    end

    context 'json content' do
      it 'shows groups as json' do
        get :index, format: :json

        expect(json_response.first['id']).to eq(group.id)
      end

      context 'nested groups', :nested_groups do
        it 'expands the tree when filtering' do
          subgroup = create(:group, :public, parent: group, name: 'filter')

          get :index, params: { filter: 'filt' }, format: :json

          children_response = json_response.first['children']

          expect(json_response.first['id']).to eq(group.id)
          expect(children_response.first['id']).to eq(subgroup.id)
        end
      end
    end
  end
end