XCode UI 测试因 'incomplete metadata' 而失败

Question

我正在尝试为我的 cocoa macOS 应用程序运行 UI 测试。但是，当运行以下测试来检查应用程序的启动性能时，测试每次都会失败:

func testLaunchPerformance() throws {
    if #available(macOS 10.15, *) {
        // This measures how long it takes to launch your application.
        measure(metrics: [XCTOSSignpostMetric.applicationLaunch]) {
            XCUIApplication().launch()
        }
    }
}

打印以下错误消息。我猜这是说我的应用程序在应用程序的多次启动之一中没有完整的元数据？!

2020-05-07 10:15:44.666665+0200 SkipItUITests-Runner[6288:100036] *** Assertion failure in -[SkipItUITests.SkipItUITests measureWithMetrics:options:block:], /Library/Caches/com.apple.xbs/Sources/XCTest/XCTest-16091/Sources/XCTestFramework/Core/XCTestCase.m:1280
    t =    12.68s Assertion Failure: SkipItUITests.swift:38: failed: caught "NSInternalInconsistencyException", "Iteration with index 1 doesn't have complete metadata. metricIdentifier: com.apple.dt.XCTMetric_OSSignpost-ApplicationLaunchExtended.duration metricDisplayName: OS Signpost Duration (ApplicationLaunchExtended) measurementForIteration: (null)"
(
    0   CoreFoundation                      0x00007fff34c91d07 __exceptionPreprocess + 250
    1   libobjc.A.dylib                     0x00007fff6d9b55bf objc_exception_throw + 48
    2   CoreFoundation                      0x00007fff34cbaec8 +[NSException raise:format:arguments:] + 88
    3   Foundation                          0x00007fff373a5f3d -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 191
    4   XCTest                              0x0000000100275b0f -[XCTestCase measureWithMetrics:options:block:] + 3518
    5   XCTest                              0x0000000100274d28 -[XCTestCase measureWithMetrics:block:] + 111
    6   SkipItUITests                       0x0000000103ac5156 $s13SkipItUITestsAAC21testLaunchPerformanceyyKF + 422
    7   SkipItUITests                       0x0000000103ac539a $s13SkipItUITestsAAC21testLaunchPerformanceyyKFTo + 74
    8   CoreFoundation                      0x00007fff34bf7a6c __invoking___ + 140
    9   CoreFoundation                      0x00007fff34bf7911 -[NSInvocation invoke] + 303
    10  XCTest                              0x0000000100270f02 __24-[XCTestCase invokeTest]_block_invoke_3 + 52
    11  XCTest                              0x0000000100338ec1 +[XCTSwiftErrorObservation observeErrorsInBlock:] + 69
    12  XCTest                              0x0000000100270e04 __24-[XCTestCase invokeTest]_block_invoke_2 + 119
    13  XCTest                              0x00000001002fea3a -[XCTMemoryChecker _assertInvalidObjectsDeallocatedAfterScope:] + 51
    14  XCTest                              0x000000010027c696 -[XCTestCase assertInvalidObjectsDeallocatedAfterScope:] + 116
    15  XCTest                              0x0000000100270d5e __24-[XCTestCase invokeTest]_block_invoke.206 + 213
    16  XCTest                              0x00000001002e6563 +[XCTestCase(Failures) performFailableBlock:testCase:testCaseRun:shouldInterruptTest:] + 69
    17  XCTest                              0x00000001002e6474 -[XCTestCase(Failures) _performTurningExceptionsIntoFailuresInterruptAfterHandling:block:] + 115
    18  XCTest                              0x00000001002707f4 -[XCTestCase invokeTest] + 1144
    19  XCTest                              0x000000010027214f __26-[XCTestCase performTest:]_block_invoke_2 + 43
    20  XCTest                              0x00000001002e6563 +[XCTestCase(Failures) performFailableBlock:testCase:testCaseRun:shouldInterruptTest:] + 69
    21  XCTest                              0x00000001002e6474 -[XCTestCase(Failures) _performTurningExceptionsIntoFailuresInterruptAfterHandling:block:] + 115
    22  XCTest                              0x0000000100272086 __26-[XCTestCase performTest:]_block_invoke.366 + 86
    23  XCTest                              0x00000001002f650e +[XCTContext runInContextForTestCase:block:] + 211
    24  XCTest                              0x000000010027193a -[XCTestCase performTest:] + 566
    25  XCTest                              0x00000001002c53f5 -[XCTest runTest] + 57
    26  XCTest                              0x000000010026bc9b __27-[XCTestSuite performTest:]_block_invoke + 354
    27  XCTest                              0x000000010026b424 __59-[XCTestSuite _performProtectedSectionForTest:testSection:]_block_invoke + 24
    28  XCTest                              0x00000001002f650e +[XCTContext runInContextForTestCase:block:] + 211
    29  XCTest                              0x000000010026b3db -[XCTestSuite _performProtectedSectionForTest:testSection:] + 148
    30  XCTest                              0x000000010026b709 -[XCTestSuite performTest:] + 348
    31  XCTest                              0x00000001002c53f5 -[XCTest runTest] + 57
    32  XCTest                              0x000000010026bc9b __27-[XCTestSuite performTest:]_block_invoke + 354
    33  XCTest                              0x000000010026b424 __59-[XCTestSuite _performProtectedSectionForTest:testSection:]_block_invoke + 24
    34  XCTest                              0x00000001002f650e +[XCTContext runInContextForTestCase:block:] + 211
    35  XCTest                              0x000000010026b3db -[XCTestSuite _performProtectedSectionForTest:testSection:] + 148
    36  XCTest                              0x000000010026b709 -[XCTestSuite performTest:] + 348
    37  XCTest                              0x00000001002c53f5 -[XCTest runTest] + 57
    38  XCTest                              0x000000010026bc9b __27-[XCTestSuite performTest:]_block_invoke + 354
    39  XCTest                              0x000000010026b424 __59-[XCTestSuite _performProtectedSectionForTest:testSection:]_block_invoke + 24
    40  XCTest                              0x00000001002f650e +[XCTContext runInContextForTestCase:block:] + 211
    41  XCTest                              0x000000010026b3db -[XCTestSuite _performProtectedSectionForTest:testSection:] + 148
    42  XCTest                              0x000000010026b709 -[XCTestSuite performTest:] + 348
    43  XCTest                              0x00000001002c53f5 -[XCTest runTest] + 57
    44  XCTest                              0x00000001003117dd __44-[XCTTestRunSession runTestsAndReturnError:]_block_invoke + 171
    45  XCTest                              0x00000001003118c3 __44-[XCTTestRunSession runTestsAndReturnError:]_block_invoke.100 + 96
    46  XCTest                              0x000000010029351b -[XCTestObservationCenter _observeTestExecutionForBlock:] + 692
    47  XCTest                              0x0000000100311567 -[XCTTestRunSession runTestsAndReturnError:] + 615
    48  XCTest                              0x000000010024ee36 -[XCTestDriver runTestsAndReturnError:] + 458
    49  XCTest                              0x00000001002f2231 _XCTestMain + 2485
    50  SkipItUITests-Runner                0x0000000100001dba _XCTRunnerRunTests + 258
    51  SkipItUITests-Runner                0x0000000100001cb8 _XCTRunnerRunTests + 0
    52  libdyld.dylib                       0x00007fff6eb5ccc9 start + 1
)
    t =    12.79s Tear Down
Test Case '-[SkipItUITests.SkipItUITests testLaunchPerformance]' failed (12.792 seconds).
Test Suite 'SkipItUITests' failed at 2020-05-07 10:15:44.831.
     Executed 1 test, with 1 failure (1 unexpected) in 12.792 (12.793) seconds
Test Suite 'SkipItUITests.xctest' failed at 2020-05-07 10:15:44.831.
     Executed 1 test, with 1 failure (1 unexpected) in 12.792 (12.793) seconds
Test Suite 'Selected tests' failed at 2020-05-07 10:15:44.832.
     Executed 1 test, with 1 failure (1 unexpected) in 12.792 (12.794) seconds

如何修复测试用例以使其成功？

Answer 1

好吧，显然我的项目设置有问题。我创建了一个新项目并将文件复制到新项目中，现在 UI 测试已经运行完毕。