```ruby
require File.expand_path('../spec_helper', __FILE__)

describe Hyperloop::View do
  before :each do
    @html_view = Hyperloop::View.new('spec/fixtures/simple/app/views/about.html')
    @erb_view  = Hyperloop::View.new('spec/fixtures/erb/app/views/about.html.erb')
  end

  describe '#format' do
    it 'is :html for HTML files' do
      expect(@html_view.format).to eql(:html)
    end

    it 'is :erb for ERB files' do
      expect(@erb_view.format).to eql(:erb)
    end
  end

  describe '#name' do
    it 'strips the extension from plain HTML files' do
      expect(@html_view.name).to eql('about')
    end

    it 'strips the extension from ERB files' do
      expect(@erb_view.name).to eql('about')
    end
  end

  describe '#render' do
    it 'renders plain HTML files' do
      expect(text_in(@html_view.render, 'h1')).to eql('About')
    end

    it 'renders ERB files' do
      expect(text_in(@erb_view.render, 'h1')).to match('I was born on December 21')
    end
  end
end
```

Add view spec for layouts
user
```ruby
require File.expand_path('../spec_helper', __FILE__)

describe Hyperloop::View do
  before :each do
    @html_view   = Hyperloop::View.new('spec/fixtures/simple/app/views/about.html')
    @erb_view    = Hyperloop::View.new('spec/fixtures/erb/app/views/about.html.erb')
    @layout_view = Hyperloop::View.new(
      'spec/fixtures/layouts/app/views/index.html.erb',
      'spec/fixtures/layouts/app/views/layouts/application.html.erb'
    )
  end

  describe '#format' do
    it 'is :html for HTML files' do
      expect(@html_view.format).to eql(:html)
    end

    it 'is :erb for ERB files' do
      expect(@erb_view.format).to eql(:erb)
    end
  end

  describe '#name' do
    it 'strips the extension from plain HTML files' do
      expect(@html_view.name).to eql('about')
    end

    it 'strips the extension from ERB files' do
      expect(@erb_view.name).to eql('about')
    end
  end

  describe '#render' do
    it 'renders plain HTML files' do
      expect(text_in(@html_view.render, 'h1')).to eql('About')
    end

    it 'renders ERB files' do
      expect(text_in(@erb_view.render, 'h1')).to eql('I was born on December 21')
    end

    it 'renders ERB files in layouts' do
      html = @layout_view.render

      expect(text_in(html, 'h1')).to eql('Layout Header')
      expect(text_in(html, 'h2')).to eql('This is the root page!')
    end
  end
end
```
assistant