content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.cassandra.service.accord;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  import org.apache.cassandra.service.accord.AccordCacheEntry.Status;
  import org.apache.cassandra.service.accord.AccordCache.Type;
  
  public class AccordCacheEntryTest
  {
      static class CacheEntry extends AccordCacheEntry<String, String>
      {
          public CacheEntry(String key, Type<String, String, ?>.Instance instance)
          {
              super(key, instance);
          }
  
          public CacheEntry(String key)
          {
              this(key, null);
          }
      }
  
      private static void assertIllegalState(Runnable runnable)
      {
          try
          {
              runnable.run();
              Assert.fail("Expected IllegalStateException");
          }
          catch (IllegalStateException ise)
          {
              // expected
          }
      }
  
      @Test
      public void loadSuccessTest()
      {
          CacheEntry state = new CacheEntry("K");
  
          Assert.assertEquals(Status.UNINITIALIZED, state.status());
          assertIllegalState(state::getExclusive);
          assertIllegalState(() -> state.setExclusive("VVVV"));
          assertIllegalState(state::loading);
  
          state.readyToLoad();
          state.testLoad();
          Assert.assertEquals(Status.LOADING, state.status());
  
          state.testLoaded("V");
          Assert.assertEquals(Status.LOADED, state.status());
          Assert.assertEquals("V", state.getExclusive());
  
          assertIllegalState(state::testLoad);
          assertIllegalState(() -> state.loaded(null));
          assertIllegalState(state::loading);
      }
  
      @Test
      public void loadNullTest()
      {
          CacheEntry state = new CacheEntry("K");
          Assert.assertEquals(Status.UNINITIALIZED, state.status());
  
          assertIllegalState(state::getExclusive);
          assertIllegalState(() -> state.setExclusive("VVVV"));
          assertIllegalState(state::loading);
  
          state.readyToLoad();
          state.testLoad();
          Assert.assertEquals(Status.LOADING, state.status());
  
          // TODO (expected): this is sort of a pointless test now - remove it?
          state.testLoaded(null);
          Assert.assertEquals(Status.LOADED, state.status());
          Assert.assertNull(state.getExclusive());
  
          assertIllegalState(state::testLoad);
          assertIllegalState(state::failedToLoad);
          assertIllegalState(state::loading);
      }
  
      @Test
      public void loadFailureTest()
      {
          CacheEntry state = new CacheEntry("K");
  
          Assert.assertEquals(Status.UNINITIALIZED, state.status());
          assertIllegalState(state::getExclusive);
          assertIllegalState(() -> state.setExclusive("VVVV"));
          assertIllegalState(state::loading);
  
          state.readyToLoad();
          state.testLoad();
          state.failedToLoad();
          Assert.assertEquals(Status.FAILED_TO_LOAD, state.status());
          assertIllegalState(state::getExclusive);
      }
  }
  