誤字rails tutorial 第13章 13.3.5 リスト13,57テスト時のエラー home.html.erbでパーシャルを使用した場合

現在rails tutorialの13章を学習しています．
そこの「13.3.5フィード画面のマイクロポストをテストする」のリスト 13.57のテストでエラーが出てしまいます．
どうやら，home.html.erbでパーシャルを使用しなければテストはパスできるのですが，その理由がわかりません．
どうか，教えてください…

発生している問題・エラーメッセージ

エラーメッセージ
ActionView::Template::Error:         ActionView::Template::Error: Missing partial microposts/_user_logged_in, application/_user_logged_in with {:locale=>[:en], :formats=>[:html], :variants=>[], :handlers=>[:raw, :erb, :html, :builder, :ruby, :jbuilder]}. Searched in:
          * "/home/ubuntu/environment/sample_app/app/views"
          * "/home/ubuntu/.rvm/gems/ruby-2.6.3/gems/actiontext-6.0.3/app/views"
          * "/home/ubuntu/.rvm/gems/ruby-2.6.3/gems/actionmailbox-6.0.3/app/views"
        
            app/views/static_pages/home.html.erb:2
            app/controllers/microposts_controller.rb:12:in `create'
            test/integration/microposts_interface_test.rb:15:in `block (2 levels) in <class:MicropostsInterfaceTest>'
            test/integration/microposts_interface_test.rb:14:in `block in <class:MicropostsInterfaceTest>'

###他参考コード
micropost_controller.rb

class
1  before_action :logged_in_user, only: [:create, :destroy]
2  before_action :correct_user,   only: :destroy
3
4  def create
5    @micropost = current_user.microposts.build(micropost_params)
6    if @micropost.save
7      flash[:success] = "Micropost created!"
8      redirect_to root_url
9    else
10      @feed_items = current_user.feed.paginate(page: params[:page])
11      render 'static_pages/home'
12    end
13  end
14．
15．
16．
17

microposts_interface_test

require 'test_helper'

class MicropostsInterfaceTest < ActionDispatch::IntegrationTest

  def setup
    @user = users(:michael)
  end

  test "micropost interface" do
    log_in_as(@user)
    get root_path
    assert_select 'div.pagination'
    # 無効な送信
    assert_no_difference 'Micropost.count' do
      post microposts_path, params: { micropost: { content: "" } }
    end
    assert_select 'div#error_explanation'
    assert_select 'a[href=?]', '/?page=2'  # 正しいページネーションリンク
    # 有効な送信
    content = "This micropost really ties the room together"
    assert_difference 'Micropost.count', 1 do
      post microposts_path, params: { micropost: { content: content } }
    end
    assert_redirected_to root_url
    follow_redirect!
    assert_match content, response.body
    # 投稿を削除する
    assert_select 'a', text: 'delete'
    first_micropost = @user.microposts.paginate(page: 1).first
    assert_difference 'Micropost.count', -1 do
      delete micropost_path(first_micropost)
    end
    # 違うユーザーのプロフィールにアクセス（削除リンクがないことを確認）
    get user_path(users(:archer))
    assert_select 'a', text: 'delete', count: 0
  end
end

_user_info.html.erb

<%= link_to gravatar_for(current_user, size: 50), current_user %>
<h1><%= current_user.name %></h1>
<span><%= link_to "view my profile", current_user %></span>
<span><%= pluralize(current_user.microposts.count, "micropost") %></span>

_micropost_form.html.erb

<%= form_with(model: @micropost, local: true) do |f| %>
  <%= render 'shared/error_messages', object: f.object %>
  <div class="field">
    <%= f.text_area :content, placeholder: "Compose new micropost..." %>
  </div>
  <%= f.submit "Post", class: "btn btn-primary" %>
  <span class="image">
    <%= f.file_field :image %>
  </span>
<% end %>

_feed.html.erb

<% if @feed_items.any? %>
  <ol class="microposts">
    <%= render @feed_items %>
  </ol>
  <%= will_paginate @feed_items,
                    params: { controller: :static_pages, action: :home } %>
<% end %>

エラーのでるソースコード

/sample_app/app/views/static_pages/home.html.erb

<% if logged_in? %>
  <%= render 'user_logged_in' %>
<% else %>
  <%= render 'user_not_logged_in' %>
<% end %>

/sample_app/app/views/static_pages/_user_logged_in.html.erb

<div class="row">
  <aside class="col-md-4">
    <section class="user_info">
      <%= render 'shared/user_info' %>
    </section>
    <section class="micropost_form">
      <%= render 'shared/micropost_form' %>
    </section>
  </aside>
  <div class="col-md-8">
    <h3>Micropost Feed</h3>
    <%= render 'shared/feed' %>
  </div>
</div>

/sample_app/app/views/static_pages/_user_not_logged_in.html．erb

<div class="center jumbotron">
  <h1>Welcome to the Sample App</h1>

  <h2>
    This is the home page for the
    <a href="https://railstutorial.jp/">Ruby on Rails Tutorial</a>
    sample application.
  </h2>
  
  <%= link_to "Sign up now!", signup_path, class: "btn btn-lg btn-primary" %>
</div>

###エラーのでないソースコード
/sample_app/app/views/static_pages/home.html.erb

<% if logged_in? %>
  <div class="row">
    <aside class="col-md-4">
      <section class="user_info">
        <%= render 'shared/user_info' %>
      </section>
      <section class="micropost_form">
        <%= render 'shared/micropost_form' %>
      </section>
    </aside>
    <div class="col-md-8">
      <h3>Micropost Feed</h3>
      <%= render 'shared/feed' %>
    </div>
  </div>
<% else %>
  <div class="center jumbotron">
    <h1>Welcome to the Sample App</h1>

    <h2>
      This is the home page for the
      <a href="https://railstutorial.jp/">Ruby on Rails Tutorial</a>
      sample application.
    </h2>

    <%= link_to "Sign up now!", signup_path, class: "btn btn-lg btn-primary" %>
  </div>

  <%= link_to image_tag("rails.svg", alt: "Rails logo", width: "200px"),
              "https://rubyonrails.org/" %>
<% end %>