Added tests

spec/features/projects/branches/delete_spec.rb

+require 'spec_helper'
+
+feature 'Delete branch', feature: true, js: true do
+  let(:project) { create(:project) }
+  let(:user) { create(:user) }
+
+  before do
+    project.team << [user, :master]
+    login_as user
+    visit namespace_project_branches_path(project.namespace, project)
+  end
+
+  it 'destroys tooltip' do
+    first('.remove-row').hover
+    expect(page).to have_selector('.tooltip')
+
+    first('.remove-row').click
+    sleep 1
+
+    expect(page).not_to have_selector('.tooltip')
+  end
+end