these ~4 lines could be extracted to a login_helper that could be mixed into feature tests, then you can just type `login(@user.username, 'password')`

It'd look something like this, and be in your `spec/support` directory:

````
module LoginHelper
  def login(username, password)
    visit sign_in_path
    fill_in 'session_username', with: @user.username
    fill_in 'session_password', with: 'password'
    click_button 'Login'
  end
end
````

Then, in any rspec file you want to use it you do something like:

````ruby
describe "Logging in or something" do
  include LoginHelper
  it "does a thing" do
    login("user", "password")
  end
end
````

And wala! we've DRYed up your code!