Why can't I import AndroidJUnit4 and ActivityTestRule into my unit test class?

Why can't I import AndroidJUnit4 and ActivityTestRule into my unit test class?

android android-support-library junit4 android-espresso

android

Unit test Java class that loads native library

java android unit-testing junit4

android

Cannot resolve symbol InstantTaskExecutorRule

android unit-testing junit4 rx-java2

android

Migrating Junit4 tests to androidx: What causes 'delegate runner could not be loaded'?

android junit junit4 androidx

android

Type Android Junit4 not present exception

android kotlin android-gradle-plugin junit4

android

How to use VisibleForTesting for pure JUnit tests

java android junit junit4 android-testing

android

Unit Test Cases with JUnit +(Robolectric or Mockito or both in Android)

android mockito junit4 robolectric

android

JUnit4 - AssertionFailedError: No tests found

android testing junit junit4 android-espresso

android

Espresso UI testing doesn't recognize onView()

java android android-gradle-plugin junit4 android-espresso

android

Can't run JUnit 4 test case in Eclipse Android project

java android eclipse junit4

android

Why is JUnit 4 on Android not working?

java android junit4 dalvik junit3

android

android espresso login once before running tests

android junit4 android-espresso ui-testing

android

Need help to write a unit test using Mockito and JUnit4

android mockito junit4

android

junit testing with gradle for an android project

android junit gradle junit4 robolectric

android

Espresso how to wait for some time(1 hour)?

android junit4 android-testing android-espresso

android