Android 本地单元测试 - 使用 MockK 模拟 FirebaseAuth
Android Local Unit Test - Mock FirebaseAuth with MockK
概述
预期行为 - 模拟 FirebaseApp.class in a local unit test with JUnit5 in Android using MockK's class, relaxed, or constructor 模拟功能。
当前行为 - 抛出以下错误。
java.lang.NoClassDefFoundError: Could not initialize class com.google.firebase.FirebaseApp
实施
Class/Functions 被嘲笑 - FirebaseAuth.class
package com.google.firebase.auth;
@NonNull
@Keep
public static FirebaseAuth getInstance() {
return (FirebaseAuth)FirebaseApp.getInstance().get(FirebaseAuth.class);
}
//`getCurrentUser` is accessed via the auto generated `currentUser` attribute in Kotlin.
@Nullable
public FirebaseUser getCurrentUser() {
return this.zzf;
}
测试 - SomeTest.kt
// Relaxed mock attempts.
every { FirebaseApp.getInstance() } returns mockk(relaxed = true)
every { FirebaseAuth.getInstance(any())} returns mockk(relaxed = true)
every { FirebaseAuth.getInstance().currentUser } returns mockk(relaxed = true)
// Class mock attempts.
mockkClass(FirebaseApp::class)
mockkClass(FirebaseAuth::class)
// Constructor mock attempts.
mockkConstructor(FirebaseApp::class)
every { anyConstructed<FirebaseApp>() } returns mockk(relaxed = true)
mockkConstructor(FirebaseAuth::class)
every { anyConstructed<FirebaseAuth>() } returns mockk(relaxed = true)
Android代码-HomeViewModel.kt
// Code called from the local unit test SomeTest.kt.
class HomeViewModel : ViewModel() {
fun getCurrentUser() = FirebaseAuth.getInstance().currentUser
...
}
注意 - 为了用下面的模拟来模拟 FirebaseRemoteConfig.class，同样的方法已经成功实施。
SomeTest.kt
mockkStatic(FirebaseRemoteConfig::class)
every { FirebaseRemoteConfig.getInstance() } returns mockk(relaxed = true)
Constants.kt
// Code called from the local unit test SomeTest.kt.
val CONTENT_REQUEST_NETWORK_ERROR = FirebaseRemoteConfig.getInstance().getString("content_request_network_error")
完整错误日志
java.lang.ExceptionInInitializerError
at com.google.firebase.FirebaseApp.<clinit>(com.google.firebase:firebase-common@@19.1.0:96)
at app.coinverse.contentviewmodel.PlayContentTests$mockComponents.invoke(PlayContentTests.kt:170)
at app.coinverse.contentviewmodel.PlayContentTests$mockComponents.invoke(PlayContentTests.kt:43)
at io.mockk.impl.eval.RecordedBlockEvaluator$record$block.invoke(RecordedBlockEvaluator.kt:24)
at io.mockk.impl.eval.RecordedBlockEvaluator$enhanceWithNPERethrow.invoke(RecordedBlockEvaluator.kt:74)
at io.mockk.impl.recording.JvmAutoHinter.autoHint(JvmAutoHinter.kt:23)
at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:36)
at io.mockk.impl.eval.EveryBlockEvaluator.every(EveryBlockEvaluator.kt:30)
at io.mockk.MockKDsl.internalEvery(API.kt:92)
at io.mockk.MockKKt.every(MockK.kt:104)
at app.coinverse.contentviewmodel.PlayContentTests.mockComponents(PlayContentTests.kt:170)
at app.coinverse.contentviewmodel.PlayContentTests.access$mockComponents(PlayContentTests.kt:43)
at app.coinverse.contentviewmodel.PlayContentTests$Play Content.invokeSuspend(PlayContentTests.kt:124)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:241)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:270)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:79)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:54)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:36)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at app.coinverse.contentviewmodel.PlayContentTests.Play Content(PlayContentTests.kt:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:125)
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:132)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:124)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestTemplateMethod(TimeoutExtension.java:81)
at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod[=16=](ExecutableInvoker.java:115)
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke[=16=](ExecutableInvoker.java:105)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:104)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:62)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:43)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:35)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod(TestMethodTestDescriptor.java:202)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:198)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:135)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:198)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:138)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute(TestTemplateTestDescriptor.java:106)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:373)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:270)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:270)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:270)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:106)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:135)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute(DefaultLauncher.java:197)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.RuntimeException: Method getMainLooper in android.os.Looper not mocked. See http://g.co/androidstudio/not-mocked for details.
at android.os.Looper.getMainLooper(Looper.java)
at com.google.firebase.FirebaseApp$UiExecutor.<clinit>(com.google.firebase:firebase-common@@19.1.0:670)
... 141 more
图书馆
- MockK 版本：1.9.3
- OS: Mac 10.14.6
- Kotlin 版本：1.3.50
- JDK版本：12.0.1
- JUnit 版本：5.5.1
- 测试类型：单元测试
使用 MockK 的 Extension & top-level functions 实现策略模拟 Firebase 的 FirebaseAuth.kt class。这将导致 FirebaseAuth class 在单元测试代码中被调用时基本上被忽略，因此不会因外部 Firebase 依赖项而导致测试崩溃。
模拟问题的根源是 static 方法 getInstance、currentUser 变量是如何自动生成的，或者两者都是。
测试 - SomeLocalJUnitTest.kt
mockkStatic(FirebaseAuth::class)
every { FirebaseAuth.getInstance() } returns mockk(relaxed = true)
Class/functions被嘲笑 - FirebaseAuth.class
package com.google.firebase.auth;
@NonNull
@Keep
public static FirebaseAuth getInstance() {
return (FirebaseAuth)FirebaseApp.getInstance().get(FirebaseAuth.class);
}
//`getCurrentUser` is accessed via the auto generated `currentUser` attribute in Kotlin.
@Nullable
public FirebaseUser getCurrentUser() {
return this.zzf;
}
Android代码 - HomeViewModel.kt
// Code called from the local unit test SomeTest.kt.
class HomeViewModel : ViewModel() {
fun getCurrentUser() = FirebaseAuth.getInstance().currentUser
...
}
概述
预期行为 - 模拟 FirebaseApp.class in a local unit test with JUnit5 in Android using MockK's class, relaxed, or constructor 模拟功能。
当前行为 - 抛出以下错误。
java.lang.NoClassDefFoundError: Could not initialize class com.google.firebase.FirebaseApp
实施
Class/Functions 被嘲笑 - FirebaseAuth.class
package com.google.firebase.auth;
@NonNull
@Keep
public static FirebaseAuth getInstance() {
return (FirebaseAuth)FirebaseApp.getInstance().get(FirebaseAuth.class);
}
//`getCurrentUser` is accessed via the auto generated `currentUser` attribute in Kotlin.
@Nullable
public FirebaseUser getCurrentUser() {
return this.zzf;
}
测试 - SomeTest.kt
// Relaxed mock attempts.
every { FirebaseApp.getInstance() } returns mockk(relaxed = true)
every { FirebaseAuth.getInstance(any())} returns mockk(relaxed = true)
every { FirebaseAuth.getInstance().currentUser } returns mockk(relaxed = true)
// Class mock attempts.
mockkClass(FirebaseApp::class)
mockkClass(FirebaseAuth::class)
// Constructor mock attempts.
mockkConstructor(FirebaseApp::class)
every { anyConstructed<FirebaseApp>() } returns mockk(relaxed = true)
mockkConstructor(FirebaseAuth::class)
every { anyConstructed<FirebaseAuth>() } returns mockk(relaxed = true)
Android代码-HomeViewModel.kt
// Code called from the local unit test SomeTest.kt.
class HomeViewModel : ViewModel() {
fun getCurrentUser() = FirebaseAuth.getInstance().currentUser
...
}
注意 - 为了用下面的模拟来模拟 FirebaseRemoteConfig.class，同样的方法已经成功实施。
SomeTest.kt
mockkStatic(FirebaseRemoteConfig::class)
every { FirebaseRemoteConfig.getInstance() } returns mockk(relaxed = true)
Constants.kt
// Code called from the local unit test SomeTest.kt.
val CONTENT_REQUEST_NETWORK_ERROR = FirebaseRemoteConfig.getInstance().getString("content_request_network_error")
完整错误日志
java.lang.ExceptionInInitializerError
at com.google.firebase.FirebaseApp.<clinit>(com.google.firebase:firebase-common@@19.1.0:96)
at app.coinverse.contentviewmodel.PlayContentTests$mockComponents.invoke(PlayContentTests.kt:170)
at app.coinverse.contentviewmodel.PlayContentTests$mockComponents.invoke(PlayContentTests.kt:43)
at io.mockk.impl.eval.RecordedBlockEvaluator$record$block.invoke(RecordedBlockEvaluator.kt:24)
at io.mockk.impl.eval.RecordedBlockEvaluator$enhanceWithNPERethrow.invoke(RecordedBlockEvaluator.kt:74)
at io.mockk.impl.recording.JvmAutoHinter.autoHint(JvmAutoHinter.kt:23)
at io.mockk.impl.eval.RecordedBlockEvaluator.record(RecordedBlockEvaluator.kt:36)
at io.mockk.impl.eval.EveryBlockEvaluator.every(EveryBlockEvaluator.kt:30)
at io.mockk.MockKDsl.internalEvery(API.kt:92)
at io.mockk.MockKKt.every(MockK.kt:104)
at app.coinverse.contentviewmodel.PlayContentTests.mockComponents(PlayContentTests.kt:170)
at app.coinverse.contentviewmodel.PlayContentTests.access$mockComponents(PlayContentTests.kt:43)
at app.coinverse.contentviewmodel.PlayContentTests$Play Content.invokeSuspend(PlayContentTests.kt:124)
at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
at kotlinx.coroutines.DispatchedTask.run(Dispatched.kt:241)
at kotlinx.coroutines.EventLoopImplBase.processNextEvent(EventLoop.common.kt:270)
at kotlinx.coroutines.BlockingCoroutine.joinBlocking(Builders.kt:79)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking(Builders.kt:54)
at kotlinx.coroutines.BuildersKt.runBlocking(Unknown Source)
at kotlinx.coroutines.BuildersKt__BuildersKt.runBlocking$default(Builders.kt:36)
at kotlinx.coroutines.BuildersKt.runBlocking$default(Unknown Source)
at app.coinverse.contentviewmodel.PlayContentTests.Play Content(PlayContentTests.kt:123)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)
at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:125)
at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:132)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:124)
at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestTemplateMethod(TimeoutExtension.java:81)
at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod[=16=](ExecutableInvoker.java:115)
at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke[=16=](ExecutableInvoker.java:105)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:104)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:62)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:43)
at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:35)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod(TestMethodTestDescriptor.java:202)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:198)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:135)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.NodeTestTask$DefaultDynamicTestExecutor.execute(NodeTestTask.java:198)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:138)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute(TestTemplateTestDescriptor.java:106)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:175)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:373)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:270)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:948)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:270)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:193)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at java.util.stream.ReferencePipeline.accept(ReferencePipeline.java:270)
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382)
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:106)
at org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:41)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:135)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at java.util.ArrayList.forEach(ArrayList.java:1257)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:139)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:125)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively(NodeTestTask.java:123)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:229)
at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute(DefaultLauncher.java:197)
at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:211)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:191)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
at com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.RuntimeException: Method getMainLooper in android.os.Looper not mocked. See http://g.co/androidstudio/not-mocked for details.
at android.os.Looper.getMainLooper(Looper.java)
at com.google.firebase.FirebaseApp$UiExecutor.<clinit>(com.google.firebase:firebase-common@@19.1.0:670)
... 141 more
图书馆
- MockK 版本：1.9.3
- OS: Mac 10.14.6
- Kotlin 版本：1.3.50
- JDK版本：12.0.1
- JUnit 版本：5.5.1
- 测试类型：单元测试
使用 MockK 的 Extension & top-level functions 实现策略模拟 Firebase 的 FirebaseAuth.kt class。这将导致 FirebaseAuth class 在单元测试代码中被调用时基本上被忽略，因此不会因外部 Firebase 依赖项而导致测试崩溃。
模拟问题的根源是 static 方法 getInstance、currentUser 变量是如何自动生成的，或者两者都是。
测试 - SomeLocalJUnitTest.kt
mockkStatic(FirebaseAuth::class)
every { FirebaseAuth.getInstance() } returns mockk(relaxed = true)
Class/functions被嘲笑 - FirebaseAuth.class
package com.google.firebase.auth;
@NonNull
@Keep
public static FirebaseAuth getInstance() {
return (FirebaseAuth)FirebaseApp.getInstance().get(FirebaseAuth.class);
}
//`getCurrentUser` is accessed via the auto generated `currentUser` attribute in Kotlin.
@Nullable
public FirebaseUser getCurrentUser() {
return this.zzf;
}
Android代码 - HomeViewModel.kt
// Code called from the local unit test SomeTest.kt.
class HomeViewModel : ViewModel() {
fun getCurrentUser() = FirebaseAuth.getInstance().currentUser
...
}