使用NSURLSession进行单元测试 [英] Unit tests with NSURLSession

问题描述

我想为使用共享 NSURLSession 的方法编写单元测试，特别是 NSURLSessionDataTask 下载数据。基本上，我希望目标方法在不需要互联网连接的情况下接收模拟响应/数据。

I'd like to write unit tests for methods that use the shared NSURLSession, and in particular, NSURLSessionDataTask to download data. Basically, I would like the target methods to receive mock responses/data without requiring an internet connection.

模拟这些组件的不那么不引人注目的方法是什么？我想用模拟响应和数据填充 NSURLCache ，但我觉得这假设过多的 NSURLSession 和 NSURLSessionDataTask 工作。还有其他任何建议吗？

What is the less unobtrusive way of mocking these components? I was thinking of populating NSURLCache with mock responses and data but I feel this assumes too much of how NSURLSession and NSURLSessionDataTask work. Any other suggestions?

推荐答案

我用 OHHTTPStubs 最近模拟回复。

I've used OHHTTPStubs to mock responses lately.

您只需在测试前注册存根（例如来自README）：

You just register the stub before you test (example from the README):

[OHHTTPStubs stubRequestsPassingTest:^BOOL(NSURLRequest *request) {
    return [request.URL.host isEqualToString:@"mywebservice.com"];
} withStubResponse:^OHHTTPStubsResponse*(NSURLRequest *request) {
    // Stub it with our "wsresponse.json" stub file
    return [OHHTTPStubsResponse responseWithFileAtPath:OHPathForFileInBundle(@"wsresponse.json",nil)
        statusCode:200 headers:@{@"Content-Type":@"text/json"}];
}];

在内部，它使用 NSURLProtocol 拦截请求和存根。

Internally, it uses NSURLProtocol to intercept the requests and stub them.

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