Capybara：未定义的方法`assert_text＆＃39;对于＃<capybara :: session>，未定义的本地变量＆＃39;响应＆＃39; </capybara :: session>

Question

集成测试：

require 'spec_helper'

describe "Create categories and items" do

    before do
        ItemCategory.create(id: 1, name: "Camping, backpacking, hiking gear")
        ItemName.create(itemcategory_id: 1, name: "2-person tent")
        ItemName.create(itemcategory_id: 1, name: "Sleeping bag")
        ItemCategory.create(id: 2, name: "Household tools")
        ItemName.create(itemcategory_id: 2, name: "Electric drill")
    end

    it "should have the categories and items" do
        ItemCategory.count == 2
        ItemName.count == 3
    end

    describe "Request page flows" do

        before do
            visit '/'
            select "Camping, backpacking, hiking gear", from: "ItemCategory"
            click_button "Go!"
            save_and_open_page
        end

        it "should go to the right request form" do
            expect(response).to have_content("Camping, backpacking, hiking gear")
            page.assert_text("Camping, backpacking, hiking gear")
            ItemName.where(itemcategory_id: ic.id).all.each do |i|
              page.has_text?(i.name)
            end
            ItemName.where.not(itemcategory_id: ic.id).all.each do |i|
              page.has_text?(i.name)
            end
        end
    end
 end

在第二个阻止（it "should go to the right request form"）它似乎没有发生Capybara响应...或者我应该使用的语义，这里是错误：

expect(response).to have_content("Camping, backpacking, hiking gear")
==> undefined local variable or method `response' for #<RSpec::Core::ExampleGroup::Nested_1::Nested_1:0x007fef26c24260>

page.assert_text("Camping, backpacking, hiking gear")
==> undefined method `assert_text' for #<Capybara::Session>

第二个看起来很明显，Capybara仍然认为我在用户会话中，我只是填写输入/点击按钮。但为什么？我已点击click_button，添加save_and_open_page会显示正确的输出。