From https://once.com/writebook

test/system/edit_page_test.rb

@@ -0,0 +1,19 @@
+require "application_system_test_case"
+
+class EditPageTest < ApplicationSystemTestCase
+  setup do
+    sign_in "kevin@37signals.com"
+  end
+
+  test "edit page" do
+    visit edit_book_page_url(books(:handbook), leaves(:welcome_page))
+    assert_selector "house-md"
+
+    fill_house_editor "page[body]", with: "Welcome to the handbook! This is the **first** page."
+
+    click_button "Save"
+
+    assert_selector ".house-md-content", text: "Welcome to the handbook! This is the **first** page."
+    assert_selector ".house-md-content strong", text: "first"
+  end
+end

test/system/publish_book_test.rb

@@ -0,0 +1,38 @@
+require "application_system_test_case"
+
+class PublishTest < ApplicationSystemTestCase
+  setup do
+    sign_in "kevin@37signals.com"
+  end
+
+  test "create and publish a book" do
+    visit new_book_url
+
+    fill_in "Book title", with: "My Book of Jokes"
+    fill_in "Author", with: "Kevin"
+    within "footer" do
+      click_button
+    end
+
+    assert_text "My Book of Jokes"
+
+    click_on "Add a new section page"
+    fill_in "leaf_title", with: "A horse walks into a bar"
+    click_on "Save"
+
+    click_on "Add a new section page"
+    fill_in "leaf_title", with: "And the barman says 'Why the long face?'"
+    click_on "Save"
+
+    find(class: "switch__btn").click
+    public_url = find(id: "invite_url").value
+
+    using_session "public" do
+      visit public_url
+      assert_text "My Book of Jokes"
+
+      page.send_keys :arrow_right
+      assert_text "A horse walks into a bar"
+    end
+  end
+end