Question

我是Ruby的新手，我正在慢慢取得进步。我刚刚开始测试。

请注意，我尚未使用任何测试框架，仅使用了Rails（5.2.3）提供的功能即可。

我有一些拥有has_many :books书籍和属于belongs_to :author作家的书籍的作者。

这些是我的固定装置：

books.yml

tmaas:
  name: The Mysterious Affair at Styles
  published: 1920
  author_id: agatha_c

tgow:
  name: The Grapes of Wrath
  published: 1939
  author_id: john_s

authors.yml

agatha_c:
  name: Agatha Christie

john_s:
  name: John Steinbeck

我跑了

rails test test/controllers/books_controller_test.rb

但是这些测试出现错误：

BooksControllerTest#test_should_update_book
BooksControllerTest#test_should_show_book
BooksControllerTest#test_should_get_edit
BooksControllerTest#test_should_destroy_book

错误始终相同，找不到书。

Error:
BooksControllerTest#test_should_destroy_book:
ActiveRecord::RecordNotFound: Couldn't find Book with 'id'=445166326 [WHERE "books"."author_id" = ?]
    app/controllers/books_controller.rb:72:in `set_book'
    test/controllers/books_controller_test.rb:47:in `block (2 levels) in <class:BooksControllerTest>'
    test/controllers/books_controller_test.rb:46:in `block in <class:BooksControllerTest>'

问题来自于致电：

author_book_url id: books(:tmaas).id, author_id: @author.id

或

edit_author_book_url id: books(:tmaas).id, author_id: @author.id

test "should destroy book" do
    assert_difference('Book.count', -1) do
      delete author_book_url id: books(:tmaas).id, author_id: @author.id
    end

    assert_redirected_to author_books_url(@author)
  end

@author在setup中设置

setup do
    @author = authors(:agatha_c)
  end

控制器中的set_book函数：

def set_book
      @book = @author.books.find(params[:id])
    end

我想念什么？

Answer 1

这就是使我的测试通过的原因：

首先，您应该将books.yml文件更正为：

tmaas:
  title: The Mysterious Affair at Styles
  published: 1920
  author: agatha_c

tgow:
  title: The Grapes of Wrath
  published: 1939
  author: john_s

这是我对book_controller动作的测试：

测试创建动作：

  test "should create book" do
    assert_difference('Book.count') do
      post author_books_url(@book.author), params: { book: { 
        author_id: @book.author_id, 
        title: @book.title,
        published: @book.published 
      }}
    end

    assert_redirected_to author_book_url(Book.last.author, Book.last)
  end

测试更新操作：

  test "should update book" do
    patch author_book_url(@book.author, @book), params: { book: { 
      author_id: @book.author_id, 
      title: @book.title,
      published: @book.published 
    } }
    assert_redirected_to author_book_url(@book.author, @book)
  end

测试破坏行为：

  test "should destroy book" do
    assert_difference('Book.count', -1) do
      delete author_book_url(@book.author, @book)
    end

    assert_redirected_to author_books_url(@book.author)
  end

查看官方的Rails指南，可能会有所帮助：https://guides.rubyonrails.org/testing.html#functional-tests-for-your-controllers

使用嵌套资源测试控制器

1 个答案: