Question

我想为与API交互的功能编写测试。我结束了：

class FileDownloaderTests: XCTestCase {

    // MARK: timeouts

    let regularTimeout: TimeInterval = 10
    let largeTimeout: TimeInterval = 15

    func testDownload() {
        // URLS.firstFileUrl.rawValue
        let downloader = FileDownloader(string: URLS.firstFileUrl.rawValue)
        downloader.download(successCompletion: {
            XCTAssertTrue(true)
        }) { error in
            print("error in test - \(error)")
        }

        waitForExpectations(timeout: largeTimeout, handler: nil)
    }
}

因此，假设要等待largeTimeout（15秒）才能成功完成关闭，然后应该通过测试。但这最终导致了错误：

*** Assertion failure in -[FileDownloaderTests.FileDownloaderTests waitForExpectationsWithTimeout:handler:], /Library/Caches/com.apple.xbs/Sources/XCTest_Sim/XCTest-14460.20/Sources/XCTestFramework/Async/XCTestCase+AsynchronousTesting.m:28
/Users/Necrosoft/Documents/Programming/Work/Life-Pay/FileDownloader/FileDownloaderTests/FileDownloaderTests.swift:28: error: -[FileDownloaderTests.FileDownloaderTests testDownload] : failed: caught "NSInternalInconsistencyException", "API violation - call made to wait without any expectations having been set."

Answer 1

您需要fulfill告知期望它可以停止等待/过程已完成

func testDownload() {
    // URLS.firstFileUrl.rawValue
    let downloader = FileDownloader(string: URLS.firstFileUrl.rawValue)
    downloader.download(successCompletion: {
        XCTAssertTrue(true)
        expectation.fulfill()
    }) { error in
        print("error in test - \(error)")
        expectation.fulfill()
    }

    waitForExpectations(timeout: largeTimeout, handler: nil)
}

注意：通常，对实时API运行自动化测试不是一个好主意。您应该使用存根响应来仅测试您对代码的处理是否正确，或者至少针对测试/登台API进行测试。

编辑：您有两个完成处理程序，所以我在每个处理程序中都称其为

Answer 2

使用以下示例创建您自己的测试

func testLogin（）抛出{ let Expectation = XCTestExpectation（描述：“使用URL注册设备ID”）

    NetworkAPI.shared.loginRequest(username: "zdravko.zdravkin", password: "password") { authenticated in
             switch authenticated {
             case true:
                 XCTAssertTrue(true, "authenticated")
             case false:
                 XCTFail("wrong username, password or deviceID")
             }
         }

    wait(for: [expectation], timeout: 10.0)
}

为API调用编写简单的测试

2 个答案: