把阿拉莫火和OHHTTPStubsWorking放在一起

Question

我正在尝试为我的单元测试设置OHHTTPStubs来使用Alamofire，但是当使用Alamofire时，它们似乎总是从活动网络加载。我已经在测试目标中关闭了使用主机应用程序，并确保首先使用OHHTTPStubs。

下面是一个示例测试，其中从Alamofire加载的结果来自实时网络：

import XCTest
import OHHTTPStubs
import Alamofire

@testable import TestAlamoFireStubs

class TestAlamoFireStubsTests: XCTestCase {

    let responseText = "{'data':'val'}"

    override func setUp() {
        super.setUp()
        stub(isHost("httpbin.org")) {request -> OHHTTPStubsResponse in
            let stubData = self.responseText.dataUsingEncoding(NSUTF8StringEncoding)
            return OHHTTPStubsResponse(data:stubData!, statusCode:200, headers:nil)
        }
    }

    func testNSURLSession(){
        let expectation = expectationWithDescription("Check NSURLSession")
        let url = NSURL(string:"https://httpbin.org/get")
        let dataTask = NSURLSession.sharedSession().dataTaskWithURL(url!){ data, response, error in
            let responseString = NSString(data:data!, encoding:NSUTF8StringEncoding) as? String
            XCTAssertEqual(responseString, self.responseText) // succeeds
            expectation.fulfill()
        }
        dataTask.resume()
        waitForExpectationsWithTimeout(10, handler:nil)
    }

    func testAlamofire() {
        let expectation = expectationWithDescription("Check Alamofire")
        Alamofire.request(.GET, "https://httpbin.org/get").response{ request, response, data, error in
            let responseString = NSString(data:data!, encoding:NSUTF8StringEncoding) as? String
            XCTAssertEqual(responseString, self.responseText) // fails
            expectation.fulfill()
        }
        waitForExpectationsWithTimeout(10, handler:nil)
    }
}

以及指向示例项目的链接：https://www.dropbox.com/s/b0qdvjpk8t6r525/TestAlamoFireStubs.zip

Answer 1

至少在我的特殊情况下，通过创建具有自定义OHHTTPStubs和配置的自定义管理器，我能够将阿拉莫火与NSURLSession联系起来。

import XCTest
import Alamofire
import OHHTTPStubs
@testable import AlamofireOHHTTPStubs

class AlamofireOHHTTPStubsTests: XCTestCase {

    let manager: Manager = {
        let configuration = NSURLSession.sharedSession().configuration

        //The most important string!
        OHHTTPStubs.setEnabled(true, forSessionConfiguration: configuration)

        configuration.URLCache = nil
        let delegate = Manager.SessionDelegate()
        let session = NSURLSession(configuration: configuration, delegate: delegate, delegateQueue: nil)
        return Manager(session: session, delegate: delegate)!
    }()

    let responseText = "{\"data\":\"val\"}"

    func testAlamofireOHHTTPStubs() {
        stub(isHost("httpbin.org")) { request -> OHHTTPStubsResponse in
            let stubData = self.responseText.dataUsingEncoding(NSUTF8StringEncoding)
            return OHHTTPStubsResponse(data:stubData!, statusCode:200, headers:nil)
        }

        let expectation = expectationWithDescription("alamofire request expectation")
        manager.request(.GET, "https://httpbin.org/get").responseJSON { (response) in
            switch response.result {
            case .Success(let json as NSDictionary):
                XCTAssertEqual(json["data"] as? String, "val")
            default:
                XCTFail()
            }
            expectation.fulfill()
        }
        waitForExpectationsWithTimeout(1.0, handler: nil)
    }

}

Answer 2

对我来说，问题是我的Podfile丢失了pod 'OHHTTPStubs'，我在那里只有pod 'OHHTTPStubs/Swift'。正确的Podfile应该如下所示：

pod 'OHHTTPStubs'  # This one required!!
pod 'OHHTTPStubs/Swift'  # This one optional

所有这些都记录在OHTTPStubs自述中。

Answer 3

如果有人想知道如何在Alamofire 4和Swift 3中设置自定义管理器，下面是解决方案：

let sessionManager: SessionManager

init() {
    let configuration = URLSessionConfiguration.default

    OHHTTPStubs.setEnabled(true, for: configuration)

    configuration.urlCache = nil

    sessionManager = SessionManager(configuration: configuration)
}