Question

我正在运行我的rspec测试并输出以下内容：

Failure/Error: expect {
 NoMethodError:
   undefined method `[]' for nil:NilClass
 # ./spec/controllers/users_controller_spec.rb:44:in `block (4 levels) in <top (required)>'

错误引用的行是“expect {”的行。我不太确定这里究竟出了什么问题。

以下是完整的规范：

require 'spec_helper'

describe UsersController do

  def valid_attributes
      {
      :username => "tester",
      :email => "tester@holler.com",
      :password => "testingpass"
      }
  end

  def valid_session
    {}
  end

  describe "POST create" do
    describe "with valid params" do
      it "creates a new User" do
        expect {
          post :create, {:user => valid_attributes , :format => :json}, valid_session
        }.to change(User, :count).by(1)
      end
    end
  end
end

关于这里出了什么问题的任何想法？

更新

评论者要求提供spec_helper.rb文件。我在下面发布它...这是由rspec生成的默认值。

# This file is copied to spec/ when you run 'rails generate rspec:install'
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'rspec/autorun'

# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

RSpec.configure do |config|
  # ## Mock Framework
  #
  # If you prefer to use mocha, flexmock or RR, uncomment the appropriate line:
  #
  # config.mock_with :mocha
  # config.mock_with :flexmock
  # config.mock_with :rr

  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  config.fixture_path = "#{::Rails.root}/spec/fixtures"

  # If you're not using ActiveRecord, or you'd prefer not to run each of your
  # examples within a transaction, remove the following line or assign false
  # instead of true.
  config.use_transactional_fixtures = true

  # If true, the base class of anonymous controllers will be inferred
  # automatically. This will be the default behavior in future versions of
  # rspec-rails.
  config.infer_base_class_for_anonymous_controllers = false

  # Run specs in random order to surface order dependencies. If you find an
  # order dependency and want to debug it, you can fix the order by providing
  # the seed, which is printed after each run.
  #     --seed 1234
  config.order = "random"
end

Answer 1

它没有错过expect方法 - 失败消息表明它[]上缺少nil。默认情况下，RSpec仅显示导致问题的规范中的行，但有时问题会更深。

在命令行上运行带有--backtrace标志的规范，以查看完整的回溯并确定真实来源。

HTH，大卫

Rspec似乎缺少期望方法......这是正确的吗？

1 个答案: