![](http://www.elsebazaar.com/blog/wp-content/uploads/2020/02/1.png)
After I upgrade from Android 2.3 to Android X. I am facing “Cannot find Symbol: ApplicationTestCase”. As I am new in Android Studio, I had no idea how to fix this problem. If I faced any problem I always go to www.google.com and search for the solution.
Today, also I did the same and searched why I get “Cannot find Symbol: ApplicationTestCase”. I found a suggestion in www.stackoverflow.com. Delete two sub-folders of the .idea folder
- ./idea/caches
- ./idea/libraries
It will solve the problem. Yes, more than 20 users voted for solved problem but when I tried the same process, it didn’t. I have to apply another procedures.
Then, I decided, Why not I create another empty project. I have recently upgrade my AndroidX. It will definitely open my ApplicationText.java class and compare to the old version.
I create a new project named My Application.
Now, Go back and see old version, ApplicationTest.java
![](http://www.elsebazaar.com/blog/wp-content/uploads/2020/02/1.png)
Now see new “Test.java” class
![](http://www.elsebazaar.com/blog/wp-content/uploads/2020/02/new-test-class.png)
Here, I find out that “ApplicationTest.Java” class has been replace by “ExampleInstrumentTest.java”.
Firstly, I need to rename the name of old java class i.e ApplicationTest.Java into ExampleInstumentTest.Java.
Here is the process how to rename java class.
Right Click ApplicationTest.Java -> Refactor -> Rename -> ExampleInstumentTest
And Save.
![](http://www.elsebazaar.com/blog/wp-content/uploads/2020/02/rename-class.png)
See the below the renamed java class how it looks like after renamed.
![](http://www.elsebazaar.com/blog/wp-content/uploads/2020/02/renamed-class.png)
Now, the time is to copy the code from newly created project to the old project.
![](http://www.elsebazaar.com/blog/wp-content/uploads/2020/02/new-test-class.png)
Lastly, Don’t forget to change the package name into your project package name. Change “MyApplication” to “Your Package Name“
Before
public class ExampleInstrumentedTest {
@Test
public void useAppContext() {
// Context of the app under test.
Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
assertEquals("com.geetaregmi.MyApplication", appContext.getPackageName());
}
}
After
public class ExampleInstrumentedTest {
@Test
public void useAppContext() {
// Context of the app under test.
Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
assertEquals("com.geetaregmi.citizenshipTest", appContext.getPackageName());
}
}
Now, add some dependency in your build.gradle(Module:app)
// Required for instrumented tests
androidTestImplementation 'androidx.test.ext:junit:1.1.1'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
androidTestImplementation 'com.android.support.test:rules:1.0.2'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
That’s it. It solved my problem. You can also try, if you are facing same problem like mine.