如何使用模型函数删除条目?

How to remove entries using a model function?

我正在处理一项 rails 作业,该作业需要模型中的 remove_entry 方法和 remove_entry 的工作测试。我在通过测试时遇到了一些麻烦。有没有人对如何在 addressbook.rb 中定义 remove_entry 方法以及如何在 entry_spec.rb 中编写测试有任何建议?

Entry.rb:

#Load a library called entry.rb
require_relative "entry.rb"

class AddressBook
  attr_accessor :entries

  def initialize
    @entries = []
  end

  def add_entry(name, phone, email)
    #Create a variable index to store
    index = 0
    @entries.each do |entry|
      if name < entry.name
        break
      end
      index += 1
    end

    @entries.insert(index,Entry.new(name,phone,email))
  end

  def remove_entry(entry)
    @entries.destroy(entry)
  end
end

地址簿规范:

RSpec.describe AddressBook do
  context "attributes" do
    it "should respond to entries" do
      book = AddressBook.new
      expect(book).to respond_to(:entries)
    end
    it "should initialize entries as an array" do
       book = AddressBook.new
       expect(book.entries).to be_a(Array)
     end

     it "should initialize entries as empty" do
       book = AddressBook.new
       expect(book.entries.size).to eq 0
     end
  end

  context ".add_entry" do
    it "adds only one entry to the address book" do
      book = AddressBook.new
      book.add_entry('Ada Lovelace', '010.012.1815', 'augusta.king@lovelace.com')

      expect(book.entries.size).to eq 1
    end

    it "adds the correct information to entries" do
       book = AddressBook.new
       book.add_entry('Ada Lovelace', '010.012.1815', 'augusta.king@lovelace.com')
       new_entry = book.entries[0]

       expect(new_entry.name).to eq 'Ada Lovelace'
       expect(new_entry.phone_number).to eq '010.012.1815'
       expect(new_entry.email).to eq 'augusta.king@lovelace.com'
    end
  end

  context ".remove_entry" do
    it "deletes one entry of the address book" do
      book.entries.delete_entry(entry)
      expect(book.entries.size).to eq 0
    end
  end
end

我也有一个 entry.rb 和 entry_spec.rb 但我相信他们的删除方法会在地址簿中,对吗?由于条目正在从该模型中删除。任何澄清将不胜感激。

remove_entry 方法应该在 AddressBook 中是对的,因为它正在修改地址簿的 entries 集合(以及 Entry class 应该对 AddressBook 或其内部结构一无所知。

但是,由于您的 add_entry 方法没有公开 Entry class,您需要使 remove_entry 以相同的方式工作,也许可以通过以下方式查找条目电子邮件(应该是唯一的,而不是可能不是唯一的名称)。所以你可以这样做:

def remove_entry(email)
  @entries.delete_if {|entry| entry.email == email}
end

要测试此方法,您需要执行如下操作:

context ".remove_entry" do
  it "deletes one entry of the address book" do
    book = AddressBook.new
    book.add_entry('Ada Lovelace', '010.012.1815', 'augusta.king@lovelace.com')

    book.delete_entry('augusta.king@lovelace.com')
    expect(book.entries.size).to eq(0)
  end
end