让 Alamofire 和 OHHTTPStubs 一起工作

Posted 2023-02-23

【中文标题】让 Alamofire 和 OHHTTPStubs 一起工作

【英文标题】：Getting Alamofire and OHHTTPStubsWorking together

【发布时间】：2016-04-01 16:55:29

【问题描述】：

我正在尝试设置 OHHTTPStubs 以与 Alamofire 一起进行单元测试，但在使用 Alamofire 时它们似乎总是从实时网络加载。我已关闭在测试目标中使用主机应用程序，并确保首先使用 OHHTTPStubs。

这是一个示例测试，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)
    

还有一个示例项目的链接： https://www.dropbox.com/s/b0qdvjpk8t6r525/TestAlamoFireStubs.zip

【参考方案1】：

至少在我的特殊情况下，我能够通过使用自定义 NSURLSession 和配置创建自定义管理器来将 Alamofire 绑定到 OHHTTPStubs

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)
    

【讨论】：

我为这个问题苦苦挣扎了好几个小时。只有创建具有自定义会话和配置的自定义管理器才有技巧。谢谢@Fyodor Volchyok

【参考方案2】：

对我来说，问题是我的 Podfile 丢失了 pod 'OHHTTPStubs'，而我那里只有 pod 'OHHTTPStubs/Swift'。正确的 Podfile 应该是这样的：

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

这一切都记录在OHTTPStubs README中。

【参考方案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，这里是解决方案：

let sessionManager: SessionManager

init() 
    let configuration = URLSessionConfiguration.default

    OHHTTPStubs.setEnabled(true, for: configuration)

    configuration.urlCache = nil

    sessionManager = SessionManager(configuration: configuration)