require 'spec_helper'

describe 'User views an open merge request' do
  let(:merge_request) do
    create(:merge_request, source_project: project, target_project: project, description: '# Description header')
  end

  context 'when a merge request does not have repository' do
    let(:project) { create(:project, :public, :repository) }

    before do
      visit(merge_request_path(merge_request))
    end

    it 'renders both the title and the description' do
      node = find('.md h1 a#user-content-description-header')
      expect(node[:href]).to end_with('#description-header')

      # Work around a weird Capybara behavior where calling `parent` on a node
      # returns the whole document, not the node's actual parent element
      expect(find(:xpath, "#{node.path}/..").text).to eq(merge_request.description[2..-1])

      expect(page).to have_content(merge_request.title).and have_content(merge_request.description)
    end
  end

  context 'when a merge request has repository', :js do
    let(:project) { create(:project, :public, :repository) }

    context 'when rendering description preview' do
      let(:user) { create(:user) }

      before do
        project.add_maintainer(user)
        sign_in(user)

        visit(edit_project_merge_request_path(project, merge_request))
      end

      it 'renders empty description preview' do
        find('.gfm-form').fill_in(:merge_request_description, with: '')

        page.within('.gfm-form') do
          click_button('Preview')

          expect(find('.js-md-preview')).to have_content('Nothing to preview.')
        end
      end

      it 'renders description preview' do
        find('.gfm-form').fill_in(:merge_request_description, with: ':+1: Nice')

        page.within('.gfm-form') do
          click_button('Preview')

          expect(find('.js-md-preview')).to have_css('gl-emoji')
        end

        expect(find('.gfm-form')).to have_css('.js-md-preview').and have_button('Write')
        expect(find('#merge_request_description', visible: false)).not_to be_visible
      end
    end

    context 'when the branch is rebased on the target' do
      let(:merge_request) { create(:merge_request, :rebased, source_project: project, target_project: project) }

      before do
        visit(merge_request_path(merge_request))
      end

      it 'does not show diverged commits count' do
        page.within('.mr-source-target') do
          expect(page).not_to have_content(/([0-9]+ commit[s]? behind)/)
        end
      end
    end

    context 'when the branch is diverged on the target' do
      let(:merge_request) { create(:merge_request, :diverged, source_project: project, target_project: project) }

      before do
        visit(merge_request_path(merge_request))
      end

      it 'shows diverged commits count' do
        page.within('.mr-source-target') do
          expect(page).to have_content(/([0-9]+ commits behind)/)
        end
      end
    end
  end
end