获取参数错误：参数的错误数量（1代表2）

Question

这是对用户模型的测试 - 问题在底部，但无法找出错误原因，尽管引用了特定行。

require 'test_helper' 

class UserTest < ActiveSupport::TestCase 

    def setup 
    @user = User.new(name: "Example User", email: "user@example.com") 
    end 

    test "should be valid" do 
    assert @user.valid? 
    end 

    test "name should be present" do 
    @user.name = " " 
    assert_not @user.valid? 
    end 

    test "email should be present" do 
    @user.email = " " 
    assert_not @user.valid? 
    end 

    test "name should not be too long" do 
    @user.name = "a" * 51 
    assert_not @user.valid? 
    end 

    test "email validation should reject invalid addresses" do 
    invalid_addresses = %w[user@example,com user_at_foo.org user.name@example.foo@bar_baz.com foo@bar+baz.com] 
    invalid_addresses.each do |invalid_address| 
     @user.email = invalid_address 
     assert_not @user.valid? 
    end 

    #this is the line 36 its complaining about... 
    test "email addresses should be unique" do 
    duplicate_user = @user.dup 
    duplicate_user.email = @user.email.upcase 
    @user.save 
    assert_not duplicate_user.valid? 
    end 
    end 
end 

我/models/user.rb如下：

class User < ActiveRecord::Base 
before_save { self.email = email.downcase } 
validates :name, presence: true, length: { maximum: 50 } 
VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i 
    validates :email, presence: true, format: { with: VALID_EMAIL_REGEX }, 
      uniqueness: { case_sensitive: false } 
end 

这是我得到的错误，但真的不知道如何，我打错了arguements的，特别是因为这是从迈克尔哈特尔书的第6章复制而来 - 一直在拖网互联网大约一天，而且完全可以解决这个问题？

ERROR["test_email_validation_should_reject_invalid_addresses", UserTest, 0.0499 
93779]                   
test_email_validation_should_reject_invalid_addresses#UserTest (0.05s)   
ArgumentError:   ArgumentError: wrong number of arguments (1 for 2)  
      test/models/user_test.rb:36:in `test'        
      test/models/user_test.rb:36:in `block in <class:UserTest>'   
     test/models/user_test.rb:36:in `test'         
     test/models/user_test.rb:36:in `block in <class:UserTest>'  

Answer 1

你end s的在最后2个测试混合了一下。以下完整修改后的文件：

require 'test_helper' 

class UserTest < ActiveSupport::TestCase 

    def setup 
    @user = User.new(name: "Example User", email: "user@example.com") 
    end 

    test "should be valid" do 
    assert @user.valid? 
    end 

    test "name should be present" do 
    @user.name = " " 
    assert_not @user.valid? 
    end 

    test "email should be present" do 
    @user.email = " " 
    assert_not @user.valid? 
    end 

    test "name should not be too long" do 
    @user.name = "a" * 51 
    assert_not @user.valid? 
    end 

    test "email validation should reject invalid addresses" do 
    invalid_addresses = %w[user@example,com user_at_foo.org user.name@example.foo@bar_baz.com foo@bar+baz.com] 
    invalid_addresses.each do |invalid_address| 
     @user.email = invalid_address 
     assert_not @user.valid? 
    end # end of each block 
    end # end of test block 

    test "email addresses should be unique" do 
    duplicate_user = @user.dup 
    duplicate_user.email = @user.email.upcase 
    @user.save 
    assert_not duplicate_user.valid? 
    end # end of test block 
end  # end of class