Junit Testing in Android Studio with Firebase

I want to write a Unit test for this class in Android Studio, but I am having problem creating test to cover usersignin() and getSignedinUserprofile() because of the use of Firebase. Does anyone have any experience with this?

public class LoginActivity extends AppCompatActivity implements View.OnClickListener{


private Button buttonSignIn;
private EditText editTextEmail;
private EditText editTextPassword;
private TextView textViewSignUp;

private ProgressDialog mProgressDialog;
private FirebaseAuth mfireBaseAuth;
private DatabaseReference mDatabase;
private String userID;
private FirebaseUser firebaseUser;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    FirebaseApp.initializeApp(this);

    mfireBaseAuth = FirebaseAuth.getInstance();
    mDatabase = FirebaseDatabase.getInstance().getReference();
    mProgressDialog = new ProgressDialog(this);
    editTextEmail = (EditText) findViewById(R.id.editTextEmail);
    editTextPassword = (EditText) findViewById(R.id.editTextPassword);
    buttonSignIn = (Button) findViewById(R.id.buttonSignIn);
    textViewSignUp = (TextView) findViewById(R.id.textViewSignUp);

    buttonSignIn.setOnClickListener(this);
    textViewSignUp.setOnClickListener(this);

}

@Override
public void onClick(View v) {
    if(v == buttonSignIn){
        usersignin();}
    if(v==textViewSignUp){
        startActivity(new Intent(this, RegisterActivity.class));}


}

public void usersignin() {

    String email = editTextEmail.getText().toString().trim();
    String password = editTextPassword.getText().toString().trim();

    if(TextUtils.isEmpty(email)){
        Toast.makeText(this, "Please enter Email", Toast.LENGTH_SHORT).show();
        return;
    }

    if(TextUtils.isEmpty(password)){
        Toast.makeText(this, "Please enter password", Toast.LENGTH_SHORT).show();
        return;
    }

    mProgressDialog.setMessage("Logging in. Please wait...");
    mProgressDialog.show();
    mfireBaseAuth.signInWithEmailAndPassword(email, password).addOnCompleteListener(this, new OnCompleteListener<AuthResult>() {
        @Override
        public void onComplete(@NonNull Task<AuthResult> task) {
            mProgressDialog.dismiss();
            if(task.isSuccessful()){
                getSignedInUserProfile();
            }
        }
    });
}

public void getSignedInUserProfile() {

    DatabaseReference reference = mDatabase;//.child("eduback-2feef");
    firebaseUser = FirebaseAuth.getInstance().getCurrentUser();
    userID = firebaseUser.getUid();
    reference.child("Users").child(userID).child("User info").addListenerForSingleValueEvent(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {
            User user = dataSnapshot.getValue(User.class);
            if(user != null) {
                // Save if the user is student or prof in shared prefs.
                PreferenceHelper helper = new PreferenceHelper(getBaseContext());
                helper.setIsStudent(user.isStudent);
                checkStudentOrProfessor(user);
            }

        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
            // Ups vis error
        }
    });
}

public void checkStudentOrProfessor(User user) {

    Intent i;
    if (user.isStudent ) {
        i = new Intent(this, MainActivityStudent.class);
    } else {
        i = new Intent(this, MainActivityProfessor.class);
    }
    startActivity(i);


}