为什么我的RSpec的测试失败

Question

这里是我的模型：

class Restaurant < ActiveRecord::Base 
    validate :name, presence: true, uniqueness: { case_sensitive: false } 
end 

下面是测试：

require 'spec_helper' 

describe Restaurant do 
    before do 
     @restaurant = Restaurant.new(name: "Momofuku") 
    end 

    subject { @restaurant } 

    it { should respond_to(:name) } 
    it { should be_valid } 

    describe "when name is not present" do 
     before { @restaurant.name = " " } 
     it { should_not be_valid} 
    end 

    describe "when name is already taken" do 
     before do 
      restaurant_with_same_name = @restaurant.dup 
      restaurant_with_same_name.name = @restaurant.name.upcase 
      restaurant_with_same_name.save 
     end 

     it { should_not be_valid } 
    end 
end 

当我运行测试，我得到的失败：

$ bundle exec rspec spec/models 
..FF 

Failures: 

    1) Restaurant when name is not present should not be valid 
    Failure/Error: it { should_not be_valid} 
     expected #<Restaurant id: nil, name: " ", created_at: nil, updated_at: nil> not to be valid 
    # ./spec/models/restaurant_spec.rb:15:in `block (3 levels) in <top (required)>' 

    2) Restaurant when name is already taken should not be valid 
    Failure/Error: it { should_not be_valid } 
     expected #<Restaurant id: nil, name: "Momofuku", created_at: nil, updated_at: nil> not to be valid 
    # ./spec/models/restaurant_spec.rb:25:in `block (3 levels) in <top (required)>' 

Finished in 0.01879 seconds 
4 examples, 2 failures 

Failed examples: 

rspec ./spec/models/restaurant_spec.rb:15 # Restaurant when name is not present should not be valid 
rspec ./spec/models/restaurant_spec.rb:25 # Restaurant when name is already taken should not be valid 

Randomized with seed 39746 

为什么？

Answer 1

使用验证而不是验证。