如何在系统测试中测试ActionText rich_text_field？

require "application_system_test_case"

class RichTextTest < ApplicationSystemTestCase
  test "测试ActionText的rich_text_field" do
    # 创建一个模型实例
    post = Post.create(title: "Hello", content: "World")

    # 访问编辑页面
    visit edit_post_path(post)

    # 在rich_text_field中插入文本
    fill_in "post_content", with: "This is a test"

    # 断言文本是否正确显示
    assert_text "This is a test"

    # 在rich_text_field中插入图片
    attach_file "post_content", Rails.root.join("test/fixtures/files/image.jpg"), visible: false

    # 断言图片是否正确显示
    assert_selector "img[src$='image.jpg']"

    # 点击保存按钮
    click_button "Save"

    # 断言保存成功后的结果
    assert_text "Post was successfully updated."
  end
end