伪造的HTTP请求响应为Android的测试 [英] Faking HTTP request responses for testing in Android

问题描述

我正在写一个Android应用程序有时需要请求通过HTTP数据从一个REST API。我使用了Apache DefaultHttpClient执行请求。有没有办法运行测试时，这样的测试结果总是一致的编写测试这个程序，并替换DefaultHttpClient的反应？

I'm writing an Android app which sometimes needs to request data through HTTP from a REST API. I'm using the Apache DefaultHttpClient for performing requests. Is there a way to write tests for this app and "replace" DefaultHttpClient's response when running the tests so that test results are always consistent?

作为的事情，我想测试中，Web服务，我访问一个例子将一个字符串进行文本搜索，返回对象的分页列表。我需要测试的情况下列表是空的，该列表装配在第一页，或者该列表大于页更大，该应用需要做出多个请求以获取完整列表。

As an example of the things I'd like to test, one of the web services I'm accessing takes a string and performs a text search, returning a paged list of objects. I need to test the cases where the list is empty, the list fits in the first page, or the list is larger than a page and the app needs to make several requests to get the complete list.

我不是这个网页API的开发者，也可以修改它的反应，所以我不能改变什么返回。对于上面的例子，如果我想测试在这里返回的列表是空的情况下，我可以只搜索，我敢肯定，将不会返回任何结果字符串，但其他两种情况都是因为什么服务可以更难回报总是在变化。

I'm not the developer of this web API nor can modify its responses, so I can't change what it returns. For the above example, if I want to test the case where the list returned is empty, I could just search for a string which I'm sure won't return any results, but the other two cases are harder because what the service can return is always changing.

我想最好我也有办法运行测试时，返回的请求到指定的URL，而不是实际上做的网络请求硬codeD结果得到修改DefaultHttpClient。这样，我总是会得到真正的Web服务的响应一致的结果独立。

I think ideally I would have a way to get a modified DefaultHttpClient when running tests, that returns a hardcoded result for requests to a given URL instead of actually doing the network request. This way I would always get consistent results independently of the real web service's response.

我目前使用Robotium测试，但我接受使用其他工具了。

I'm currently using Robotium for testing but I'm open to using other tools too.

推荐答案

是的，你绝对可以在使用HttpClient的框架假的反应。这是相当令人费解，我将不得不离开大多数细节给你，但我会给你一个简单概述：

Yes, you can definitely "fake" responses when using the HttpClient framework. It's quite convoluted, and I will have to leave most of the details up to you, but I will give you a quick overview:

1. 实施 ClientHtt prequestFactory ，主要是让你可以覆盖的createRequest（）方法，以便你可以...

1. Implement ClientHttpRequestFactory, mainly so you can override the createRequest() method so you can...

返回您的自定义实施 ClientHtt prequest ，其中你可以覆盖执行（）方法，因此，你可以...

Return your custom implementation of ClientHttpRequest, in which you can override the execute() method so you can ...

返回您的自定义实施 ClientHtt presponse 中，你将最终能够回到你的假响应数据，例如： getBody（）可以返回一个文件的内容，可以硬code。在 getHeaders头（）等等。

Return your custom implementation of ClientHttpResponse in which you will finally be able to return your fake response data, e.g. getBody() can return the content of a file, you can hardcode the headers in getHeaders(), etc.

剩下的是搞清楚如何最好地将所有这些把戏到你的服务层。

The rest is figuring out how to best tie all these shenanigans to your service layer.

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