From https://once.com/writebook

test/controllers/leafables_controller_test.rb

@@ -0,0 +1,54 @@
+require "test_helper"
+
+class LeafablesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+    sign_in :kevin
+  end
+
+  test "show" do
+    get leafable_slug_path(leaves(:welcome_page))
+
+    assert_response :success
+    assert_select "p", "This is such a great handbook."
+  end
+
+  test "show with public access to a published book" do
+    sign_out
+    books(:handbook).update!(published: true)
+
+    get leafable_slug_path(leaves(:welcome_page))
+
+    assert_response :success
+    assert_select "p", "This is such a great handbook."
+  end
+
+  test "show does not allow public access to an unpublished book" do
+    sign_out
+
+    get leafable_slug_path(leaves(:welcome_page))
+
+    assert_response :not_found
+  end
+
+  test "create" do
+    assert_changes -> { books(:handbook).leaves.count }, +1 do
+      post book_pages_path(books(:handbook), format: :turbo_stream), params: {
+        leaf: { title: "Another page" }, page: { body: "With interesting words." }
+      }
+    end
+
+    assert_response :success
+  end
+
+  test "create requires editor access" do
+    books(:handbook).access_for(user: users(:kevin)).update! level: :reader
+
+    assert_no_changes -> { books(:handbook).leaves.count } do
+      post book_pages_path(books(:handbook), format: :turbo_stream), params: {
+        leaf: { title: "Another page" }, page: { body: "With interesting words." }
+      }
+    end
+
+    assert_response :forbidden
+  end
+end