Convert cucumber nodes-feature to rspec-feature
user
```ruby
require 'rails_helper'

describe "Nodes Feature" do

  describe 'Find, update and create nodes via API' do

    before do
      # Given a provider "stiftung" exists with name: "Stiftung Gesundheit"
      provider = FactoryGirl.create(:provider, name: "Stiftung Gesundheit")
      # And 1 valid pois exist
      poi = FactoryGirl.create(:poi)
      # And the following provided_pois exist
      FactoryGirl.create(:provided_poi, wheelchair: "yes", url: "http://www.arzt-auskunft.de", poi: poi, provider: provider )
      # When I am on the last poi's page
      visit(node_path(poi))
    end

    # Scenario: I want to see a decent title on the poi detail page
    it "has a decent title on the poi detail page" do
        # Then I should see "Dieser Ort ist auf Wheelmap.org: name, Bar, Essen & Trinken, Berlin" within "title"
        expect(page.title).to eq("Dieser Ort ist auf Wheelmap.org: name, Bar, Essen & Trinken, Berlin")
    end

    # Scenario: I want to see a link to a landing page on the poi detail page
    it "has a link to a landing page on the poi detail page" do
      # Then I should see "Alle Orte vom Typ"
      expect(page).to have_link('Alle Orte vom Typ', href: "/map/berlin/bar/wheelchair/yes")
    end

    # Scenario: I want to see a back link to the root page
    it "has a back link to the root page" do
      save_page
      # When I follow "zurück"
      click_link('zurück')
      # Then I should be on the home page
      expect(current_path).to eq(root_path)
    end

    # Scenario: I want to see a link to provider's detail page
    # Then I should see "Stiftung Gesundheit"
    it "shows 'Stiftung Gesundheit' on provider's detail page" do
      expect(page).to have_content("Stiftung Gesundheit")
    end

    # And I should see "Voll Rollstuhlgerecht"
    it "shows 'voll rollstuhlgerecht' on 'Stiftung Gesundheit' detail page" do
      expect(page).to have_content("Voll Rollstuhlgerecht")
    end

    # Scenario: I want to see a wheelchair description
    it "has a wheelchair description" do
      # Then I should see "Yes, we have a ramp."
      expect(page).to have_content("Yes, we have a ramp.")
    end
  end
end
```
assistant