錯誤單元測試：underfined assert_not

Question

我有兩個錯誤，當我運行rake test：

1)Error 
test_should_require_a_following_id(RelationTest) 
NoMethodError:underfined method 'assert_not' for #<RelationTest:0x3dd0058> 
2)Error 
test_should_require_a_follower_id(RelationTest) 
NoMethodError:underfined method 'assert_not' for #<RelationTest:0x3c1d700> 

這是我relation_test.rb

require 'test_helper' 
class RelationTest < ActiveSupport::TestCase 
    def setup 
    @relation = Relation.new(follower_id: 9, following_id: 10) 
    end 

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

    test "should require a follower_id" do 
    @relation.follower_id = nil 
    assert_not @relation.valid? 
    end 

    test "should require a following_id" do 
    @relation.following_id = nil 
    assert_not @relation.valid? 
    end 
end 

我的關係模型

class Relation < ActiveRecord::Base 
    attr_accessible :following_id, :follower_id 
    belongs_to :follower, :class_name => "User" 
    belongs_to :following, :class_name => "User" 

    validates :follower_id, presence: true 
    validates :following_id, presence: true 
end 

能有什麼我確實解決了這個問題，請幫助我！ 我認爲問題是我的鐵桿（3.2.19），但assert @relation.valid?仍然工作？

Answer 1

assert_not已被添加到rails 4.0.2中。您需要這樣做：

assert !@relation.valid?