Question

我想测试导入CSV文件的方法。但我不知道如何生成虚假的CSV文件来测试它。我尝试了很多我已经在堆栈上找到的解决方案，但它在我的情况下不起作用。

这是csv原始文件：

firstname,lastname,home_phone_number,mobile_phone_number,email,address
orsay,dup,0154862548,0658965848,orsay.dup@gmail.com,2 rue du pré paris
richard,planc,0145878596,0625147895,richard.planc@gmail.com,45 avenue du general leclerc

person.rb

 def self.import_data(file)
   filename = File.join Rails.root, file

   CSV.foreach(filename, headers: true, col_sep: ',') do  |row|
     firstname, lastname, home_phone_number, mobile_phone_number, email, address = row

     person = Person.find_or_create_by(firstname: row["firstname"], lastname: row['lastname'], address: row['address'] )
     if person.is_former_email?(row['email']) != true
       person.update_attributes({firstname: row['firstname'], lastname: row['lastname'], home_phone_number: row['home_phone_number'], mobile_phone_number: row['mobile_phone_number'], address: row['address'], email: row['email']})
    end
  end
end

person_spec.rb：

require "rails_helper"

RSpec.describe Person, :type => :model do


  describe "CSV file is valid" do
   file = #fake file
   it "should read in the csv" do
   end

   it "should have result" do
  end
 end

 describe "import valid data" do
  valid_data_file = #fake file
  it "save new people" do
   Person.delete_all
   expect { Person.import_data(valid_data_file)}.to change{ Person.count }.by(2)
   expect(Person.find_by(lastname: 'dup').email).to eq "orsay.dup@gmail.com"
 end

 it "update with new email" do
 end
end

describe "import invalid data" do
 invalid_data_file = #fake file
 it "should not update with former email" do
 end
 it "should not import twice from CSV" do
 end
 end
end

Answer 1

我成功使用Faked CSV Gem中的https://github.com/jiananlu/faked_csv来实现您使用虚假数据生成CSV文件的目的。

请按照以下步骤使用它：

打开命令行（即在OSX上打开Spotlight with CMD + Space，然后输入＆＃34; Terminal＆＃34;）
通过运行命令gem install faked_csv安装Faked CSV Gem。注意：如果使用Ruby on Rails项目将gem 'faked_csv'添加到Gemfile，然后运行bundle install
通过键入Bash Terminal faked_csv --version
为伪造的CSV Gem创建配置文件，并在其中定义如何生成虚假数据。例如，下面将生成一个包含200行的CSV文件（或编辑为您希望的任意数量），并为每个字段包含逗号分隔的列。如果字段type的值以faker:为前缀，则请参阅＆＃34; Usage＆＃34;例如Faker Gem https://github.com/stympy/faker的部分。

<强> my_faked_config.csv.json

{
  "rows": 200,
  "fields": [
    {
      "name": "firstname",
      "type": "faker:name:first_name",
      "inject": ["luke", "dup", "planc"]
    },
    {
      "name": "lastname",
      "type": "faker:name:last_name",
      "inject": ["schoen", "orsay", "richard"]
    },
    {
      "name": "home_phone_number",
      "type": "rand:int",
      "range": [1000000000, 9999999999]
    },
    {
      "name": "mobile_phone_number",
      "type": "rand:int",
      "range": [1000000000, 9999999999]
    },
    {
      "name": "email",
      "type": "faker:internet:email"
    },
    {
      "name": "address",
      "type": "faker:address:street_address",
      "rotate": 200
    }
  ]
}

运行以下命令以使用配置文件my_faked_config.csv.json在名为 my_faked_data.csv 的当前文件夹中生成CSV文件，其中包含虚假数据faked_csv -i my_faked_config.csv.json -o my_faked_data.csv
由于生成的文件在生成后可能不包含每列的关联标签，只需在 my_faked_data.csv firstname,lastname,home_phone_number,mobile_phone_number,email,address
查看包含假数据的 my_faked_data.csv CSV文件的最终内容，该文件应与以下内容类似：

<强> my_faked_data.csv

firstname,lastname,home_phone_number,mobile_phone_number,email,address
Kyler,Eichmann,8120675609,7804878030,norene@bergnaum.io,56006 Fadel Mission
Hanna,Barton,9424088332,8720530995,anabel@moengoyette.name,874 Leannon Ways
Mortimer,Stokes,5645028548,9662617821,moses@kihnlegros.org,566 Wilderman Falls
Camden,Langworth,2622619338,1951547890,vincenza@gaylordkemmer.info,823 Esmeralda Pike
Nikolas,Hessel,5476149226,1051193757,jonathon@ziemannnitzsche.name,276 Reinger Parks
...

使用下面显示的技术修改 person_spec.rb 单元测试，该技术将模拟数据传递给您 person.rb import_data函数的测试功能>文件

<强> person_spec.rb

require 'rails_helper' RSpec.describe Person, type: :model do describe 'Class' do subject { Person } it { should respond_to(:import_data) } let(:data) { "firstname,lastname,home_phone_number,mobile_phone_number,email,address\r1,Kyler,Eichmann,8120675609,7804878030,norene@bergnaum.io,56006 Fadel Mission" } describe "#import_data" do it "save new people" do File.stub(:open).with("filename", {:universal_newline=>false, :headers=>true}) { StringIO.new(data) } Product.import("filename") expect(Product.find_by(firstname: 'Kyler').mobile_phone_number).to eq 7804878030 end end end end

注意：我自己使用它为我的Ruby on Rails CSV app生成一个包含有意义假数据的大型CSV文件。我的应用程序允许用户上传包含特定列名的CSV文件并将其保存到PostgreSQL数据库，然后在Paginated表视图中显示数据，并能够使用AJAX进行搜索和排序。

Answer 2

使用openoffice或excel并将文件另存为保存选项中的.csv文件。电子表格程序。

生成假CSV以使用rspec进行测试

2 个答案: