Rspec的匹配器不使用自定义错误消息

Question

我有一个自定义匹配：

RSpec::Matchers.define :have_value do |attribute, expected| 
    match do |obj| 
    obj.send(attribute) == expected 
    end 

    description do 
    "have attribute #{attribute} with value #{expected}" 
    end 
end 

这是我如何使用它的例子：

context "description" do 
     subject { create_obj_from_file(file_name) } 
     h = { 
      :attribute1 => 6, 
      :attribute2 => 3, 
      :attribute3 => "PL" } 
     } 
     h.each do |k,v| it { should have_value k, v} end 
    end 

这是正常运行我的测试。但是，当我得到一个错误，这不是自定义错误，它是“预期{masssive对象转储}有价值：atttribute和值”任何想法，我什么我做错了？

Answer 1

感谢您使用响应你的最后一个问题，我的代码以下是你需要什么，这个例子：

failure_message_for_should do |obj| 
    "should have value #{expected} for attribute #{attribute} but got #{obj.send(attribute)}" 
    end 


    failure_message_for_should_not do |obj| 
    "should not have value #{expected} for attribute #{attribute} but got #{obj.send(attribute)}" 
    end 

Answer 2

您需要指定自定义失败消息从the wiki一个例子：。

RSpec::Matchers.define :be_a_multiple_of do |expected| 
    match do |actual| 
    actual % expected == 0 
    end 

    failure_message_for_should do |actual| 
    "expected that #{actual} would be a precise multiple of #{expected}" 
    end 

    failure_message_for_should_not do |actual| 
    "expected that #{actual} would not be a precise multiple of #{expected}" 
    end 

    description do 
    "be a precise multiple of #{expected}" 
    end 
end