单元测试中的超类是否应该不匹配

Question

尝试使用 shoulda 和 rails 3 编写一个简单的单元测试。

test/unit/user_test.rb

class UserTest < Test::Unit::TestCase
  should validate_presence_of(:password, :on => :create)
  should validate_presence_of(:handle, :email)
  should validate_confirmation_of(:password)
  should validate_length_of(:handle, :within => 6..15)
  should validate_uniqueness_of(:handle)
  should validate_format_of(:handle, :with => /\A\w+\z/i)
  should validate_length_of(:email, :within => 6..100)
end

Gemfile

的相关部分

group :test do
  gem 'shoulda'
  gem 'rspec-rails', '2.0.0.beta.12'
end

当我尝试使用 rake test --trace 运行它时，我收到以下错误：

** Execute test:units
/Users/removed/removed/removed/app_name/test/unit/user_test.rb:5: superclass mismatch for class UserTest (TypeError)
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:239:in `require'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:239:in `require'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:227:in `load_dependency'
    from /Library/Ruby/Gems/1.8/gems/activesupport-3.0.7/lib/active_support/dependencies.rb:239:in `require'
    from /Library/Ruby/Gems/1.8/gems/rake-0.9.2/lib/rake/rake_test_loader.rb:9
    from /Library/Ruby/Gems/1.8/gems/rake-0.9.2/lib/rake/rake_test_loader.rb:9:in `each'
    from /Library/Ruby/Gems/1.8/gems/rake-0.9.2/lib/rake/rake_test_loader.rb:9
    from /Library/Ruby/Gems/1.8/gems/rake-0.9.2/lib/rake/rake_test_loader.rb:5:in `each'
    from /Library/Ruby/Gems/1.8/gems/rake-0.9.2/lib/rake/rake_test_loader.rb:5

我理解错误，我只是不知道在哪里定义另一个 UserTest 类，这给了我这个问题。有什么想法吗？

迈克

Answer 1

检查find . | xargs grep -l UserTest 的输出，防止意外重复使用类名。

Answer 2

我想避免这个错误的唯一方法是执行以下操作：

UserTest = Class.new(Test::Unit::TestCase)
class UserTest # Or class UserTest < Test::Unit::TestCase is also allowed
  should validate_presence_of(:password, :on => :create)
  should validate_presence_of(:handle, :email)
  should validate_confirmation_of(:password)
  should validate_length_of(:handle, :within => 6..15)
  should validate_uniqueness_of(:handle)
  should validate_format_of(:handle, :with => /\A\w+\z/i)
  should validate_length_of(:email, :within => 6..100)
end

如果你要重复

UserTest = Class.new(Test::Unit::TestCase) # repeated

你会得到

warning: already initialized constant UserTest

但是这种方法看起来有点奇怪。