An older way of doing in-memory dbs on Android without Room.

InMemoryDatabase.java

package com.brantapps.oceanlife.domain.fixture;

import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

import org.robolectric.RuntimeEnvironment;

/**
 * In memory database for testing purposes.
 *
 * Created by davidb on 29/09/15.
 */
public class InMemoryDatabase extends SQLiteOpenHelper {

  public InMemoryDatabase(int version) {
    super(RuntimeEnvironment.application, null, null, version);
  }


  @Override
  public void onCreate(SQLiteDatabase db) {
    // No-op test db! - fixtures will be added by the tests cases
  }

  @Override
  public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    // No-op test db!
  }
}