RSpec:新用户视图测试失败，该测试应通过

我对这次考试有信心：

require 'rails_helper'
require 'support/factory_girl'

RSpec.describe 'users/new', type: :view do
    before(:each) do
        assign(:user, create(:user))
    end

    it 'renders new user form' do
        render
        assert_select 'form[action=?][method=?]', users_path, 'post'
    end
end

这一页，表格在这张图的第二行：

此测试失败，因为未找到任何表单

rspec spec/views/users/new.html.erb_spec.rb

users/new
  renders new user form (FAILED - 1)

Failures:

  1) users/new renders new user form
     Failure/Error: assert_select 'form[action=?][method=?]', users_path, 'post'

     Minitest::Assertion:
       Expected at least 1 element matching "form[action="/users"][method="post"]", found 0..
       Expected 0 to be >= 1.
     # /home/ramses/.rvm/gems/ruby-2.4.0@gym-app/gems/minitest-5.10.3/lib/minitest/assertions.rb:139:in `assert'
     # /home/ramses/.rvm/gems/ruby-2.4.0@gym-app/gems/minitest-5.10.3/lib/minitest/assertions.rb:270:in `assert_operator'
     # /home/ramses/.rvm/gems/ruby-2.4.0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector_assertions.rb:277:in `assert_size_match!'
     # /home/ramses/.rvm/gems/ruby-2.4.0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector_assertions.rb:172:in `block in assert_select'
     # /home/ramses/.rvm/gems/ruby-2.4.0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector_assertions.rb:171:in `tap'
     # /home/ramses/.rvm/gems/ruby-2.4.0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector_assertions.rb:171:in `assert_select'
     # ./spec/views/users/new.html.erb_spec.rb:11:in `block (2 levels) in <top (required)>'

Finished in 0.24509 seconds (files took 2.93 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/views/users/new.html.erb_spec.rb:9 # users/new renders new user form

rspec spec/views/users/new.html.erb_spec.rb
用户/新
呈现新用户表单（失败-1）
失败：
1） 用户/new呈现新的用户表单
失败/错误：断言\u选择'form[action=？][method=？'，用户\u路径，'post'
Minitest:：断言：
应至少有1个元素与“form[action=“/users”][method=“post”]”匹配，找到0。。
预期0大于等于1。
#/home/ramses/.rvm/gems/ruby-2.4。0@gym-app/gems/minitest-5.10.3/lib/minitest/assertions.rb:139:in'assert'
#/home/ramses/.rvm/gems/ruby-2.4。0@gym-app/gems/minitest-5.10.3/lib/minitest/assertions.rb:270:in'assert_operator'
#/home/ramses/.rvm/gems/ruby-2.4。0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector\u assertions.rb:277:in'assert\u size\u match！'
#/home/ramses/.rvm/gems/ruby-2.4。0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector\u assertions.rb:172:in'block in assert\u select'
#/home/ramses/.rvm/gems/ruby-2.4。0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector_assertions.rb:171:in'tap'
#/home/ramses/.rvm/gems/ruby-2.4。0@gym-app/gems/rails-dom-testing-2.0.3/lib/rails/dom/testing/assertions/selector\u assertions.rb:171:in'assert\u select'
#./spec/views/users/new.html.erb_spec.rb:11:in'block（2层）in'
完成时间为0.24509秒（加载文件需要2.93秒）
1例，1例失败
失败的示例：
rspec./spec/views/users/new.html.erb#u spec.rb:9#users/new呈现新用户表单

---

我必须在测试中更改什么才能使其通过？

我认为呈现视图时出现问题（可能您没有设置变量，并且出现错误？）

这样说：

it 'renders new user form' do
    render
    puts subject
    assert_select 'form[action=?][method=?]', users_path, 'post'
end

检查那里有什么

---

您可以在此处设置断点，检查

主题

的内容，或者将其保存在

html

文件中并在浏览器中打开以供检查，而不是

放置主题

问题在于测试描述的是一个

新的

操作，但是在

before（：each）

块中，正在创建一个用户，从而触发一个

编辑

操作

因此，问题在于测试本身，而不是在视图中

require 'rails_helper'
require 'support/factory_girl'

RSpec.describe 'users/new', type: :view do
    before(:each) do
        #use build instead of create, to pass a non-saved user
        assign(:user, build(:user))
    end

    it 'renders new user form' do
        render
        # you can use byebug to inspect variables.
        # byebug
        # I figured this out by inspecting the contents of the rendered var
        #inside byebug, use var to show all variables in context
        assert_select 'form[action=?][method=?]', users_path, 'post'
    end
end

---

根据你的建议，我能把它弄明白；请参阅我的答案以获得解决方案。我使用了

byebug

而不是

put subject

，并输入了

rendered

变量