Rails插件的功能测试,assert_template坏了吗?

时间:2009-11-21 20:28:41

标签: ruby-on-rails ruby unit-testing ruby-on-rails-plugins

我正在编写一个向ActionController::Base添加类方法的插件,因此在我的功能测试中,我创建了一个简单的控制器来进行测试。以下示例完全被剥离,基本上什么都不做。测试一直持续到assert_template,但失败了。

require 'rubygems'
require 'test/unit'
require 'active_support'
require 'active_support/test_case'
require 'action_controller'
require 'action_controller/test_process'

class UnderTestController < ActionController::Base
  def index; end
end
ActionController::Routing::Routes.draw {|map| map.resources :under_test }

class MyPluginTest < ActionController::TestCase
  def setup
    @controller = UnderTestController.new
    @request    = ActionController::TestRequest.new
    @response   = ActionController::TestResponse.new
  end

  test "should render the correct template" do
    get :index
    assert_template :index  # everything works except this assert
  end
end

以下是运行上述文件的结果:

Loaded suite /Users/jjulian/sandbox/vendor/plugins/my_plugin/test/my_plugin_test
Started
E 
Finished in 0.014567 seconds.

  1) Error:
test_should_render_the_correct_template(MyPluginTest):
NoMethodError: undefined method `[]' for nil:NilClass
method assert_template in response_assertions.rb at line 103
method clean_backtrace in test_case.rb at line 114
method assert_template in response_assertions.rb at line 100
method test_should_render_the_correct_template in so_test.rb at line 22
method __send__ in setup_and_teardown.rb at line 62
method run in setup_and_teardown.rb at line 62

1 tests, 0 assertions, 0 failures, 1 errors

我的问题:我错过了什么让assert_template工作?我需要正确的库吗?扩展正确的TestCase类?

2 个答案:

答案 0 :(得分:3)

我明白了。首先,缺少的模板是因为view_path需要在被测控制器中显式设置:

before_filter {|c| c.prepend_view_path(File.join(File.dirname(__FILE__), 'fixtures')) }

我在test/fixtures/under_test/index.erb中创建了一个虚拟erb文件。这让我回到response_assertions.rb中的零错误。好吧,看起来我需要包含另一个测试类:

require 'action_view/test_case'

现在可行。

另外需要注意:assert_template使用match来确定成功,因此在这种情况下,assert_template 'ind'会成功,assert_template 'x'也会成功。

答案 1 :(得分:1)

尝试使用tests UnderTestController替换测试中的设置方法。 Rails负责自动设置测试控制器,请求和响应。