```ruby
require 'spec_helper'

describe 'Assets' do
  subject(:asset) { page.body }

  describe 'Static' do
    it 'provides the crown header' do
      visit '/assets/header-crown.png'
      asset.should_not be_empty
    end
  end

  describe 'Compiled JS' do
    it 'includes library code' do
      visit '/assets/govuk_admin_template.js'
      expect(asset).to include('Bootstrap')
      expect(asset).to include('jQuery')
    end
  end
end
```

Add asset test for IE shims
user
```ruby
require 'spec_helper'

describe 'Assets' do
  subject(:asset) { page.body }

  it 'serves images, eg the crown header' do
    visit '/assets/header-crown.png'
    asset.should_not be_empty
  end

  describe 'Compiling javascript' do
    it 'compiles library code' do
      visit '/assets/govuk_admin_template.js'
      expect(asset).to include('Bootstrap')
      expect(asset).to include('jQuery')
    end

    it 'compiles IE shims' do
      visit '/assets/lte-ie8.js'
      expect(asset).to include('respond')
      expect(asset).to include('html5')
    end
  end
end
```
assistant