```ruby
require 'rubygems'
require 'bundler'

Bundler.setup
require 'rack/test'
require 'webmock/rspec'
require File.expand_path '../../app.rb', __FILE__

ENV["RACK_ENV"] ||= 'test'

module RSpecMixin
  include Rack::Test::Methods
  def app() Sinatra::Application end

  def session
    last_request.env['rack.session']
  end
end

module NetHttpStubs
  def stub_github_access_token_endpoint!
    stub_request(:post, 'https://github.com/login/oauth/access_token').
      with(
        client_id: app.settings.client_id,
        client_secret: app.settings.client_secret,
        code: code
      ).
      to_return(status: 200, body: { access_token: access_token }.to_json)
  end

  def stub_github_fetch!(url, client:, &return_value)
    return_value ||= ->() { '' }
    stub_request(:get, url).
      with(
        query: {
          client_id:     client.client_id,
          client_secret: client.client_secret
        },
        headers: {
          'Accept' => 'application/json',
          'Authorization' => "token #{client.access_token}"
        }
      ).
      to_return(status: 200, body: return_value)
  end
end

RSpec.configure do |config|
  config.mock_with :rspec
  config.include RSpecMixin
  config.include NetHttpStubs
end
```

Add Vim modeline and fold markers
user
```ruby
# vim:ai:fdm=marker
require 'rubygems'
require 'bundler'

Bundler.setup
require 'rack/test'
require 'webmock/rspec'
require File.expand_path '../../app.rb', __FILE__

ENV["RACK_ENV"] ||= 'test'

module RSpecMixin
  # {{{
  include Rack::Test::Methods
  def app() Sinatra::Application end

  def session
    last_request.env['rack.session']
  end
  # }}}
end

module NetHttpStubs
  def stub_github_access_token_endpoint! # {{{
    stub_request(:post, 'https://github.com/login/oauth/access_token').
      with(
        client_id: app.settings.client_id,
        client_secret: app.settings.client_secret,
        code: code
      ).
      to_return(status: 200, body: { access_token: access_token }.to_json)
  end # }}}

  def stub_github_fetch!(url, client:, &return_value) # {{{
    return_value ||= ->() { '' }
    stub_request(:get, url).
      with(
        query: {
          client_id:     client.client_id,
          client_secret: client.client_secret
        },
        headers: {
          'Accept' => 'application/json',
          'Authorization' => "token #{client.access_token}"
        }
      ).
      to_return(status: 200, body: return_value)
  end # }}}
end

RSpec.configure do |config|
  config.mock_with :rspec
  config.include RSpecMixin
  config.include NetHttpStubs
end
```
assistant