Delegate runner 'androidx.test.internal.runner.junit4.AndroidJUnit4ClassRunner' for AndroidJUnit4 could not be loaded

Question

I try to run Kotlin instrumentation tests for android.

In my app/build.gradle:

    android {
        dataBinding {
            enabled = true
               


        

Answer 1

I faced this problem in kotlin , used below code and it worked

@RunWith(AndroidJUnit4::class)

@LargeTest

class MainActivityTest {

    private val TAG = "MainActivityTest"

    @get:Rule
    val activityRule = ActivityTestRule(MainActivity::class.java)
}

follow the link below:- https://developer.android.com/training/testing/junit-rules

Answer 2

I got this error when I have some parameters in my test method. So, if you have it - delete it.

@Test
fun someTestMethod(someParams: Int) { // delete method params
    assert(1==1)
}