Testing views without helpers or decorators

_todo.html.erb

<li class='<%= 'complete' if todo.complete? %>' id='<%= dom_id todo %>'>
  <%= todo.description %>
  <% if todo.completed_at? -%>
    <%= link_to 'Incomplete', todo_completion_path(todo), method: :delete %>
  <% else -%>
    <%= link_to 'Complete', todo_completion_path(todo), method: :post %>
  <% end -%>
</li>

index.html.erb

<ul id='my-todos'>
  <%= render @todos %>
</ul>

todos_todo.html.erb_spec.rb

describe 'todos/_todo.html.erb' do
  it 'generates a link to complete the todo when incomplete' do
    todo = build_stubbed(:todo)
    page = render_todo(todo)
    page.should have_css(
      "a[data-method='post'][href='#{todo_completion_path(todo)}']",
      text: 'Complete'
    )
  end

  it 'generates a link to mark the todo as incomplete when complete' do
    todo = build_stubbed(:todo, :completed)
    page = render_todo(todo)
    page.should have_css(
      "a[data-method='delete'][href='#{todo_completion_path(todo)}']",
      text: 'Incomplete'
    )
  end

  def render_todo(todo)
    render partial: 'todos/todo', locals: { todo: todo }
    Capybara.string(rendered)
  end
end