Question

我的答案模型上有2个范围的唯一性验证，我试图使用Rspec和相应的shoulda匹配器来测试这些。

如下面test trace所示，唯一性验证消息存在于errors数组中，但是，还存在2个，有时还有3个其他错误; "body can't be blank (nil)", "body is too short (minimum is 10 characters) (nil)", "user_id can't be blank (nil)"。我不确定它们来自哪里，因为在前一个块中明确设置了body和user属性。

如何更正这些额外错误，以便唯一性测试通过？

answer.rb

    validates_uniqueness_of :correct, scope: :question_id, if: :correct?, message: "You can only have 1 correct answer per question"
    validates_uniqueness_of :user_id, scope: :question_id, message: "Only 1 answer per question per user"

    /* omitted for brevity */

answer_spec.rb

require "spec_helper"

describe Answer do  
  before(:each) do
    @user1 = create(:user)
    @answer = create(:answer, correct: true, user_id: @user1.id, body: "some text which is over 10 chars long")
  end

  subject { @answer }

  it { should respond_to(:user_id) }
  it { should respond_to(:question_id) }
  it { should respond_to(:body) }
  it { should respond_to(:correct)}
  it { should respond_to(:votes_count)}
  it { should respond_to(:points)}
  it { should belong_to(:question)}
  it { should belong_to(:user)}
  it { should have_many(:activities)}
  it { should have_many(:comments)}
  it { should have_many(:votes)}
  it { should validate_uniqueness_of(:correct).scoped_to(:question_id).with_message("correct You can only have 1 correct answer per question (true)") }
  it { should validate_uniqueness_of(:user_id).scoped_to(:question_id).with_message("user_id Only 1 answer per question per user (1)") }

/* omitted for brevity */

测试痕迹

  1) Answer 
     Failure/Error: it { should validate_uniqueness_of(:correct).scoped_to(:question_id).with_message("correct You can only have 1 correct answer per question (true)") }
       Expected errors to include "correct You can only have 1 correct answer per question (true)" when correct is set to true, got errors: ["body can't be blank (nil)", "body is too short (minimum is 10 characters) (nil)", "user_id can't be blank (nil)", "correct You can only have 1 correct answer per question (true)"]
     # ./spec/models/answer_spec.rb:20:in `block (2 levels) in <top (required)>'

  2) Answer 
     Failure/Error: it { should validate_uniqueness_of(:user_id).scoped_to(:question_id).with_message("user_id Only 1 answer per question per user (1)") }
       Expected errors to include "user_id Only 1 answer per question per user (1)" when user_id is set to 1, got errors: ["body can't be blank (nil)", "body is too short (minimum is 10 characters) (nil)", "user_id Only 1 answer per question per user (1)"]
     # ./spec/models/answer_spec.rb:21:in `block (2 levels) in <top (required)>'

Finished in 1.31 seconds
17 examples, 2 failures

factory.rb

factory :answer do
    user
    question_id :question
    body "you need to change your grip"
    votes_count 0
    correct false
  end

Answer 1

它失败了，因为你没有测试@answer。你没有在这些测试中定义你的主题。所以它使用的是rspec的subject，默认情况下会转到你所描述的任何类的新实例，即。 Answer.new。您需要将主题明确设置为@answer或显式测试@answer。

describe Answer do
  it { should validate_uniqueness_of(:correct).scoped_to(:question_id).with_message("correct You can only have 1 correct answer per question (true)") }
  it { should validate_uniqueness_of(:user_id).scoped_to(:question_id).with_message("user_id Only 1 answer per question per user (1)") }
end

Rspec validates_uniqueness_of测试失败并出现其他验证错误

1 个答案: