升级Target SDK至34后MockK静态Mock Log类出现匹配失败异常

问题概述 #

单元测试在Target SDK 28环境下可正常通过，升级至SDK 34后，MockK静态Mock Log类时出现方法签名匹配失败异常。

相关代码 #

测试类代码 #

val TAG = Logging.tag<MyClass>()
@Before
fun setUp() {
    MockKAnnotations.init(this, relaxUnitFun = true)

    activitySwitchManagerUtil = ActivitySwitchManagerUtil(activityManager,
        activitySwitchObserverUtil)

    mockkStatic(Log::class)
    every { Log.d(any(), any()) } returns 0
    every { Log.i(any(), any()) } returns 0
    every { Log.e(any(), any()) } returns 0
}

@Test
fun `test 1`() {
    // ... 测试逻辑
    verify {
        Log.i(TAG, "Registered Activity Switch Observer")
    }
}

Logging工具类代码 #

object Logging {
    inline fun <reified T : Any> tag(): String {
        return "$applicationName::${T::class.simpleName}"
    }
}

异常信息 #

io.mockk.MockKException: Failed matching mocking signature for

left matchers: [any(), any()]
    at io.mockk.impl.recording.SignatureMatcherDetector.detect(SignatureMatcherDetector.kt:99)
    at io.mockk.impl.recording.states.RecordingState.signMatchers(RecordingState.kt:38)
    at io.mockk.impl.recording.states.RecordingState.round(RecordingState.kt:30)
    at io.mockk.impl.recording.CommonCallRecorder.round(CommonCallRecorder.kt:45)
    at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:47)
    at io.mockk.impl.eval.EveryBlockEvaluator.every(EveryBlockEvaluator.kt:25)
    at io.mockk.MockKDsl.internalEvery(API.kt:93)
    at io.mockk.MockKKt.every(MockK.kt:104)
    at com.company.app.util.MyClassTest.setUp(MyClassTest.kt:37)
    at java.base@17.0.12/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base@17.0.12/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base@17.0.12/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base@17.0.12/java.lang.reflect.Method.invoke(Method.java:569)
    at app//org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at app//org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at app//org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:52)
    at app//org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    at app//org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:489)
    at app//org.robolectric.internal.SandboxTestRunner$2.lambda$evaluate$2(SandboxTestRunner.java:291)
    at app//org.robolectric.internal.bytecode.Sandbox.lambda$runOnMainThread$0(Sandbox.java:104)
    at java.base@17.0.12/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base@17.0.12/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
    at java.base@17.0.12/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
    at java.base@17.0.12/java.lang.Thread.run(Thread.java:840)

当前环境 #

target sdk = 34
MockK = 1.8.10
Robolectric = 4.12.2
JDK17 = 1.0

已尝试的无效写法 #

every { Log.d(any<String>(), any<String>()) } returns 0
every { Log.d(TAG, any<String>()) } returns 0
every { Log.d(TAG, "test") } returns 0

解决方案 #

方案1：升级MockK版本（推荐） #

MockK 1.8.10版本对Android 14（SDK34）的系统类静态方法重载匹配存在兼容性问题，升级至1.13.8或更高稳定版本即可解决。修改项目依赖：

// 单元测试依赖
testImplementation "io.mockk:mockk:1.13.8"
// 仪器化测试依赖（如果需要）
androidTestImplementation "io.mockk:mockk-android:1.13.8"

升级后原有的every { Log.d(any(), any()) } returns 0写法可正常运行。

方案2：使用Relaxed静态Mock #

在调用mockkStatic时添加relaxed = true参数，让MockK自动匹配所有Log类的静态方法重载，并返回对应类型的默认值（int类型默认返回0），无需手动编写every语句：

mockkStatic(Log::class, relaxed = true)

方案3：明确匹配所有方法重载（不推荐） #

如果无法升级版本，需手动指定匹配Log类的所有相关方法重载，包括带Throwable参数的版本：

// Mock两个参数的重载
every { Log.d(any<String>(), any<String>()) } returns 0
every { Log.i(any<String>(), any<String>()) } returns 0
every { Log.e(any<String>(), any<String>()) } returns 0

// Mock带Throwable的三个参数重载
every { Log.d(any<String>(), any<String>(), any<Throwable>()) } returns 0
every { Log.i(any<String>(), any<String>(), any<Throwable>()) } returns 0
every { Log.e(any<String>(), any<String>(), any<Throwable>()) } returns 0

内容的提问来源于stack exchange，提问作者enjoinslip