Question

我想用RSpec测试以下模型：

class Language < ActiveRecord::Base
  has_and_belongs_to_many :dvds
  validates :title, presence: true, uniqueness: { case_sensitive: false }
end

language_spec.rb

describe Language do
  describe 'title validation' do
    context 'title is present' do
      before(:each) do
        @lang = Language.new(title: 'English')
      end

      it 'is valid with present title' do
        expect(@lang).to have_exactly(0).errors_on(:title)
      end
    end

    context 'title is not present' do
      before(:each) do
        @lang = Language.create
      end

      it 'has an error on title attribute' do
        expect(@lang).to have_exactly(1).errors_on(:title)
      end

    end
  end
end

不幸的是我遇到了测试失败：

故障：

1）语言标题验证标题存在有效   标题        失败/错误：期望（@lang）.to have_exactly（0）.errors_on（：title）        NoMethodError：          '
中未定义的方法errors_on' for #<Language:0xaa40e98> # ./spec/models/language_spec.rb:9:in阻止（4级）
2）语言标题验证标题不存在时出错   标题属性        失败/错误：期望（@lang）.to have_exactly（1）.errors_on（：title）        NoMethodError：          '
中未定义的方法errors_on' for #<Language id: nil, title: nil, created_at: nil, updated_at: nil> # ./spec/models/language_spec.rb:19:in阻止（4级）

的Gemfile

source 'https://rubygems.org'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '4.1.1'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.3'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer',  platforms: :ruby

# Use jquery as the JavaScript library
gem 'jquery-rails'
# Turbolinks makes following links in your web application faster. Read more: https://github.com/rails/turbolinks
gem 'turbolinks'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.0'
# bundle exec rake doc:rails generates the API under doc/api.
gem 'sdoc', '~> 0.4.0',          group: :doc

# Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
gem 'spring',        group: :development

# Pagination plugin
gem 'will_paginate', '~> 3.0'

# Testing
group :development, :test do
  gem "rspec-rails", "~> 3.0.1"
  gem "factory_girl_rails", "~> 4.4.1"
end

group :test do
  gem "faker", "~> 1.3.0"
  gem "capybara", "~> 2.3.0"
  gem "database_cleaner", "~> 1.3.0"
  gem "launchy", "~> 2.4.2"
  gem "selenium-webdriver", "~> 2.42.0"
end

为什么我会收到undefined method "errors_on"的任何想法？

Answer 1

errors_on匹配器已移至the rspec-collection_matchers gem，因此将其添加到您的Gemfile会修复错误。

如果你想摆脱非核心语法，你可以做到

describe Language do
  describe 'title validation' do
    context 'title is present' do
      before(:each) do
        @lang = Language.new(title: 'English')
      end

      it 'is valid with present title' do
        expect(@lang.errors[:title]).to be_empty
      end
    end

    context 'title is not present' do
      before(:each) do
        @lang = Language.create
      end

      it 'has an error on title attribute' do
        expect(@lang.errors.added?(:title, :blank)).to be_true
      end
    end

  end
end

（have_exactly and related matchers have also moved to rspec-collection_matchers.）

Answer 2

尝试设置类型选项：

describe Language, type: :model do

或使用infer_spec_type_from_file_location!（请参阅here）

RSpec.configure do |config|
  config.infer_spec_type_from_file_location!
end

RSpec未定义方法“errors_on”

2 个答案: