[英]Testing with Firesbase in Android Studio JUnit Test
Firebase totally works fine in my Android Studio, but it crashes when I try to test it with it. Firebase在我的Android Studio中完全可以正常工作,但是当我尝试对其进行测试时会崩溃。
public class ExampleUnitTest {
DatabaseReference rootReference = FirebaseDatabase.getInstance().getReference();
DatabaseReference tournamentReference = rootReference.child("Tournaments");
DatabaseReference matchReference = tournamentReference.child("Test Tournament").child("Matches");
@Test
public void addition_isCorrect() throws Exception {
DatabaseReference testReference = matchReference.child("Nov 13, 2017 Team Eagles vs Team Tigers");
testReference.addValueEventListener(new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
for(DataSnapshot snapshot : dataSnapshot.getChildren()) {
assertEquals(snapshot.child("fieldName").getValue().toString(), "UIUC Sixpack Field");
}
}
@Override
public void onCancelled(DatabaseError databaseError) {
}
});
}
}
In this test case, it gives me an error : 在这个测试案例中,它给了我一个错误:
java.lang.ExceptionInInitializerError
at com.google.firebase.FirebaseApp.getInstance(Unknown Source)
at com.google.firebase.database.FirebaseDatabase.getInstance(Unknown Source)
Is there a way to solve make it work? 有没有办法解决这个问题?
This is happening because the json file does not exists in the right place. 发生这种情况是因为json文件不在正确的位置。 Redownload
google-services.json
file from Project Settings in the Firebase console and put it in the right place in your project. 从Firebase控制台的“项目设置”中重新下载
google-services.json
文件,并将其放在项目中的正确位置。
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