Rspec嘲笑一个错误，即.backtrace被调用？

我想模拟一个错误消息，以一个错误作为参数并调用.backtrace。我的方法是这样的：Rspec嘲笑一个错误，即.backtrace被调用？

def log_error(error) 
    puts error.backtrace 
    puts "RECONCILE_TAX_RATES [#{Time.now}] ERROR [#{error.message}]" 
    end

把error.backtrace线之前，我的测试看起来像：

it 'logs errors' do 
    time = "Tue, 16 Sep 2014 20:18:19 UTC +00:00" 
    Timecop.freeze(time) do 
     tax_reconciler = TaxReconciler.new 
     error_message = "I'm sorry, Dave. I'm afraid I can't do that." 
     expected = "RECONCILE_TAX_RATES [2014-09-16 20:18:19 UTC] ERROR [I'm sorry, Dave. I'm afraid I can't do that.]" 

     STDOUT.should_receive(:puts).with(expected) 
     tax_reconciler.log_error(error_message) 
    end 
    end

目前该方法已经改变采取的错误，而不仅仅是一个消息我很困惑至于如何编写测试。任何帮助表示赞赏，并让我知道如果我需要包括更多的信息，请。

the error I am getting is: 
Failure/Error: tax_reconciler.log_error(error_message) 
    NoMethodError: 
     undefined method `backtrace' for "I'm sorry, Dave. I'm afraid I can't do that.":String

以便每下面我试图

it 'logs errors' do 
    time = "Tue, 16 Sep 2014 20:18:19 UTC +00:00" 
    Timecop.freeze(time) do 
     expected = "RECONCILE_TAX_RATES [2014-09-16 20:18:19 UTC] ERROR [I'm sorry, Dave. I'm afraid I can't do that.]" 
     STDOUT.should_receive(:puts).with(expected) 
     tax_reconciler = TaxReconciler.new 
     begin 
     raise "I'm sorry, Dave. I'm afraid I can't do that." 
     rescue => error_message 
     tax_reconciler.log_error(error_message) 
     end 
    end 
    end

确定这样的建议下面的解决方案是如下的建议：

it 'logs errors' do 
    time = "Tue, 16 Sep 2014 20:18:19 UTC +00:00" 
    Timecop.freeze(time) do 
     expected = "RECONCILE_TAX_RATES [2014-09-16 20:18:19 UTC] ERROR [I'm sorry, Dave. I'm afraid I can't do that.]" 
     tax_reconciler = TaxReconciler.new 
     begin 
     raise "I'm sorry, Dave. I'm afraid I can't do that." 
     rescue => error_message 
     STDOUT.should_receive(:puts).with(expected) 
     STDOUT.should_receive(:puts).with(error_message.backtrace) 
     tax_reconciler.log_error(error_message) 
     end 
    end 
    end

来源

2014-09-23 ruby_newbie

你从rspec那个断言中得到了什么输出？ – Discorick 2014-09-24 02:03:58

@Discorick我更新了当前的错误信息。 – 2014-09-24 15:02:53

基于该Rspec的错误消息，您的源失败很简单。在你的规范中，你传递一个字符串作为错误。

error_message = "I'm sorry, Dave. I'm afraid I can't do that."

的的log_error方法试图称之为“回溯”的字符串，而不是一个实际的异常试试这个：。

begin 
    raise "I'm sorry, Dave. I'm afraid I can't do that." 
rescue => error_message 
    tax_reconciler.log_error(error_message) 
end

这将传递一个实际的异常对象插入方法

来源

2014-09-24 16:29:28 Discorick

Rspec嘲笑一个错误，即.backtrace被调用？

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