如何测试与 Web 服务通信的 Ruby 命令行程序? [英] How can I test a Ruby command-line program that communicates with a web service?

问题描述

我正在构建一个与 Web 服务通信的 Ruby 命令行程序.我正在使用 Cucumber 和 Aruba 来测试程序.问题是我需要控制从 Web 服务返回的数据；该程序会抓取用户评论流，因此随着新评论的添加，这可能会经常更改.我尝试使用 WebMock 模拟 Web 服务，但这不起作用，因为 Aruba 将命令行程序转为不受 WebMock 影响的单独进程(因此它仍然与 real网络服务).

I am building a Ruby command-line program that communicates with a web service. I am using Cucumber and Aruba to test the program. The problem is that I need to control the data returned from the web service; the program grabs a stream of user comments, so this can change frequently as new comments are added. I tried to mock the web service using WebMock, but this didn't work, since Aruba spins the command-line program off into a separate process that is unaffected by WebMock (so it still communicated with the real web service).

如何使用 Cucumber 测试该程序的输出?

How can I test the output of this program using Cucumber?

Web 服务将流作为 JSON 数据返回.我已经捕获了用于测试的数据快照；简而言之，我正在寻找一种方法来替换我的静态数据来代替对 Web 服务的实际调用.

The web service returns the stream as JSON data. I've captured a snapshot of data to use for testing; in a nutshell, I'm looking for a way to substitute my static data in place of an actual call to the web service.

或者，如果有完全不同的方式来实现这个目标，我会全力以赴.

Or, if there's a completely different way to accomplish this goal, I'm all ears.

推荐答案

Aruba 提供了一种模式，可让您在进程中"运行事物，从而允许您使用 WebMock 或 VCR.这是一篇博客文章，解释了如何做到这一点:

Aruba provides a mode that lets you run things "in process" that will allow you to use WebMock or VCR. Here's a blog post explaining how to do that:

http://georgemcintosh.com/vcr-and-aruba/

或者，您可以考虑编写一个新的二进制文件，首先加载 VCR 或 WebMock，然后加载并执行您的主二进制文件，并让您的测试运行此二进制文件.

Alternately, you can consider writing a new binary that first loads VCR or WebMock, and then loads and executes your main binary, and have your test run this binary.

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