Ruby Rspec黄瓜：命名法

我正在跟踪，我无法理解为什么在运行cucumber时会出现以下错误

Feature: code-breaker starts game

  As a code-breaker
  I want to start a game
  So that I can break the code

  Scenario: start game                          # /Users/PC/ruby/practice/rspec/codebreaker/features/codebreaker_starts_game.feature:7
    Given I am not yet playing                  # ruby/practice/rspec/codebreaker/features/step_definitions/codebreaker_steps.rb:17
    When I start a new game                     # ruby/practice/rspec/codebreaker/features/step_definitions/codebreaker_steps.rb:20
    Then I should see "Welcome to Codebreaker!" # ruby/practice/rspec/codebreaker/features/step_definitions/codebreaker_steps.rb:25
      undefined method `messages' for #<RSpec::Matchers::BuiltIn::Output:0x007fd6611fcb30> (NoMethodError)
      ./ruby/practice/rspec/codebreaker/features/step_definitions/codebreaker_steps.rb:26:in `/^I should see "(.*?)"$/'
      ./ruby/practice/rspec/codebreaker/features/codebreaker_starts_game.feature:10:in `Then I should see "Welcome to Codebreaker!"'
    And I should see "Enter guess:"             # ruby/practice/rspec/codebreaker/features/step_definitions/codebreaker_steps.rb:25

Failing Scenarios:
cucumber /Users/PC/ruby/practice/rspec/codebreaker/features/codebreaker_starts_game.feature:7 # Scenario: start game

1 scenario (1 failed)
4 steps (1 failed, 1 skipped, 2 passed)
0m0.050s

shell returned 1

步骤定义文件：

---

注意：我试过打印output.messages，效果很好。

我相信您遇到了内置的输出匹配器，它是RSpec的一部分，请参阅。是否在尝试检查输出的同一点上尝试打印步骤定义中的output.messages？你也应该受到同样的失败

---

无论如何，如果您使用不同的方法名称，您应该可以。

我相信您遇到的是内置的输出匹配器，它是RSpec的一部分，请参阅。是否在尝试检查输出的同一点上尝试打印步骤定义中的output.messages？你也应该受到同样的失败

---

在任何情况下，如果使用不同的方法名称，您都应该可以。

Peter Alfvin是对的：重命名输出方法。以下是对我有效的方法：

class OutputDouble
  def messages
    @messages ||= []
  end
  def puts(message)
    messages << message
  end
end

def output_double
  @output ||= OutputDouble.new
end

Given /^I am not yet playing$/ do
end

When /^I start a new game$/ do
  game = Codebreaker::Game.new(output_double)
  game.start
end

Then /^I should see "([^"]*)"$/ do |message|
  output_double.messages.should include(message)
end

---

请注意，创建方法输出已重命名为output_double。

Peter Alfvin是正确的：重命名输出方法。以下是对我有效的方法：

class OutputDouble
  def messages
    @messages ||= []
  end
  def puts(message)
    messages << message
  end
end

def output_double
  @output ||= OutputDouble.new
end

Given /^I am not yet playing$/ do
end

When /^I start a new game$/ do
  game = Codebreaker::Game.new(output_double)
  game.start
end

Then /^I should see "([^"]*)"$/ do |message|
  output_double.messages.should include(message)
end

请注意，创建方法输出已重命名为output\u double。

这可能是一个副本，也可能是一个副本