content: /**
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.aurora.scheduler.storage;
  
  import java.util.Optional;
  
  import com.google.inject.Guice;
  import com.google.inject.Injector;
  import com.google.inject.Module;
  
  import org.apache.aurora.scheduler.storage.Storage.MutateWork.NoResult;
  import org.junit.Before;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  
  public abstract class AbstractSchedulerStoreTest {
  
    protected Injector injector;
    private Storage storage;
  
    @Before
    public void setUp() {
      injector = Guice.createInjector(getStorageModule());
      storage = injector.getInstance(Storage.class);
      storage.prepare();
    }
  
    protected abstract Module getStorageModule();
  
    @Test
    public void testSchedulerStore() {
      assertEquals(Optional.empty(), select());
      save("a");
      assertEquals(Optional.of("a"), select());
      save("b");
      assertEquals(Optional.of("b"), select());
    }
  
    private void save(String id) {
      storage.write(
          (NoResult.Quiet) storeProvider -> storeProvider.getSchedulerStore().saveFrameworkId(id));
    }
  
    private Optional<String> select() {
      return storage.read(storeProvider -> storeProvider.getSchedulerStore().fetchFrameworkId());
    }
  }
  