Routes are not available when testing with RSpec 3.2 in rails 4.2

I've got these both files and I'd like to test it in Rails 4.2 (using RSpec 3.2) But when running I get the exception.

Does anyone has an idea to fix this?

new.html.erb_spec.rb:

require 'rails_helper'

RSpec.describe "products/new", type: :view do
  before(:each) do
    assign(:product, Product.new())
  end

  it "renders new product form" do
    render

    # assert_select "form[action=?][method=?]", products_path, "post" do
    # end
  end
end

new.html.erb:

<h1>New Product</h1>


<%= link_to 'Back', products_path %>

Exception:

  1) products/new renders new product form
     Failure/Error: render
     ActionView::Template::Error:
       undefined local variable or method `products_path' for #<#<Class:0x007fc7da6d6240>:0x007fc7da6cf3a0>
     # ./app/views/products/new.html.erb:4:in `_app_views_products_new_html_erb__2726879035604323536_70248169634620'
     # /Users/endem/.rvm/gems/ruby-2.2.1/gems/actionview-4.2.4/lib/action_view/template.rb:145:in `block in render'
     # /Users/endem/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/notifications.rb:164:in `block in instrument'
     # /Users/endem/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
     # /Users/endem/.rvm/gems/ruby-2.2.1/gems/activesupport-4.2.4/lib/active_support/notifications.rb:164:in `instrument'