Hey i was wondering if it s necessary to have a slf4j depend

Question

Hey i was wondering if it s necessary to have a slf4j dependency to use mockk in an android unit test I used mockk in jvm only projects before and was not aware of any logger dependency therefore i only used the mockk android and mockk agent dependency This leads to the following error even when i try to mock the simplest data class Adding slf4j simple solved the issue Caused by java lang RuntimeException Method isLoggable in android util Log not mocked gt full error in thread

albrechtroehm · Answer

```java lang ExceptionInInitializerError at ScreenViewModelTest setUp ScreenViewModelTest kt 47 at java base jdk internal reflect NativeMethodAccessorImpl invoke0 Native Method at java base jdk internal reflect NativeMethodAccessorImpl invoke NativeMethodAccessorImpl java 77 at java base jdk internal reflect DelegatingMethodAccessorImpl invoke DelegatingMethodAccessorImpl java 43 at java base java lang reflect Method invoke Method java 568 at org junit runners model FrameworkMethod$1 runReflectiveCall FrameworkMethod java 59 at org junit internal runners model ReflectiveCallable run ReflectiveCallable java 12 at org junit runners model FrameworkMethod invokeExplosively FrameworkMethod java 56 at org junit internal runners statements RunBefores invokeMethod RunBefores java 33 at org junit internal runners statements RunBefores evaluate RunBefores java 24 at org junit runners ParentRunner$3 evaluate ParentRunner java 306 at org junit runners BlockJUnit4ClassRunner$1 evaluate BlockJUnit4ClassRunner java 100 at org junit runners ParentRunner runLeaf ParentRunner java 366 at org junit runners BlockJUnit4ClassRunner runChild BlockJUnit4ClassRunner java 103 at org junit runners BlockJUnit4ClassRunner runChild BlockJUnit4ClassRunner java 63 at org junit runners ParentRunner$4 run ParentRunner java 331 at org junit runners ParentRunner$1 schedule ParentRunner java 79 at org junit runners ParentRunner runChildren ParentRunner java 329 at org junit runners ParentRunner access$100 ParentRunner java 66 at org junit runners ParentRunner$2 evaluate ParentRunner java 293 at org junit runners ParentRunner$3 evaluate ParentRunner java 306 at org junit runners ParentRunner run ParentRunner java 413 at org gradle api internal tasks testing junit JUnitTestClassExecutor runTestClass JUnitTestClassExecutor java 108 at org gradle api internal tasks testing junit JUnitTestClassExecutor execute JUnitTestClassExecutor java 58 at org gradle api internal tasks testing junit JUnitTestClassExecutor execute JUnitTestClassExecutor java 40 at org gradle api internal tasks testing junit AbstractJUnitTestClassProcessor processTestClass AbstractJUnitTestClassProcessor java 60 at org gradle api internal tasks testing SuiteTestClassProcessor processTestClass SuiteTestClassProcessor java 52 at java base jdk internal reflect NativeMethodAccessorImpl invoke0 Native Method at java base jdk internal reflect NativeMethodAccessorImpl invoke NativeMethodAccessorImpl java 77 at java base jdk internal reflect DelegatingMethodAccessorImpl invoke DelegatingMethodAccessorImpl java 43 at java base java lang reflect Method invoke Method java 568 at org gradle internal dispatch ReflectionDispatch dispatch ReflectionDispatch java 36 at org gradle internal dispatch ReflectionDispatch dispatch ReflectionDispatch java 24 at org gradle internal dispatch ContextClassLoaderDispatch dispatch ContextClassLoaderDispatch java 33 at org gradle internal dispatch ProxyDispatchAdapter$DispatchingInvocationHandler invoke ProxyDispatchAdapter java 94 at jdk proxy1 jdk proxy1 $Proxy2 processTestClass Unknown Source at org gradle api internal tasks testing worker TestWorker$2 run TestWorker java 176 at org gradle api internal tasks testing worker TestWorker executeAndMaintainThreadName TestWorker java 129 at org gradle api internal tasks testing worker TestWorker execute TestWorker java 100 at org gradle api internal tasks testing worker TestWorker execute TestWorker java 60 at org gradle process internal worker child ActionExecutionWorker execute ActionExecutionWorker java 56 at org gradle process internal worker child SystemApplicationClassLoaderWorker call SystemApplicationClassLoaderWorker java 113 at org gradle process internal worker child SystemApplicationClassLoaderWorker call SystemApplicationClassLoaderWorker java 65 at worker org gradle process internal worker GradleWorkerMain run GradleWorkerMain java 69 at worker org gradle process internal worker GradleWorkerMain main GradleWorkerMain java 74 Caused by java lang RuntimeException Method isLoggable in android util Log not mocked See <https developer android com r studio ui build not mocked> for details at android util Log isLoggable Log java at org slf4j impl AndroidLoggerAdapter isLoggable AndroidLoggerAdapter java 543 ```