Android studio can not resolve Mockito classes

Issue

Despite Mockito dependency in the testImplementation, Android Studio shows red lines complaining, it can not resolve dependency.

Below is the output of dependencies task with testImplementation as configuration.

gradle :exo-audio:dependencies --configuration testImplementation



testImplementation - Implementation only dependencies for 'test' sources. (n)
+--- junit:junit:4.12 (n)
+--- org.hamcrest:hamcrest-all:1.3 (n)
+--- org.mockito:mockito-all:1.10.19 (n)
+--- com.squareup.okhttp3:mockwebserver:4.2.1 (n)
\--- com.google.dagger:dagger:2.24 (n)

(n) - Not resolved (configuration is not meant to be resolved)

Here is the screenshot of Android Studio showing errors

I have tried cleaning build cache and invalidate restart, nothing seems to be working. Even I have also tried by removing .idea and .gradle directories manually and loading project again.

I think the problem is with Android Studio, even with studio complaining about the classes, I am able to run tests e.g. for the following test hash code is printed.

@Test
    fun foo() {
        println(repository.hashCode())
    }

Solution

Finally! I have resolved it at the end of the day. I will list down the steps I performed.

1. Checked test source directores and classpath in module.iml file, everything looked fine here

   <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
   

2. Checked versions available in local gradle cache

   allaudin@geek ~/.gradle/caches/modules-2/files-2.1/org.mockito/mockito-core$ ls
   
   1.10.19  2.10.0  2.19.0  2.27.0  2.28.0  2.28.2  2.6.1  2.7.22
   

Finally I tried with different version, it didn't work for versions till 2.10.0 and then started working for version 2.19.0.

I tried to figure out the root cause but I have to code a lot before I go to sleep. Over to experts for figuring out why some versions do not work ;)

Answered By - mallaudin