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.bifromq.basekv.raft;
  
  import static org.mockito.Mockito.when;
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertFalse;
  import static org.testng.Assert.assertTrue;
  import static org.testng.Assert.fail;
  
  import org.apache.bifromq.basekv.raft.exception.ReadIndexException;
  import org.apache.bifromq.basekv.raft.proto.ClusterConfig;
  import java.util.concurrent.CompletableFuture;
  import org.mockito.Mock;
  import org.mockito.MockitoAnnotations;
  import org.slf4j.Logger;
  import org.testng.annotations.AfterMethod;
  import org.testng.annotations.BeforeMethod;
  import org.testng.annotations.Test;
  
  public class ReadProgressTrackerTest {
      ReadProgressTracker readProgressTracker;
      @Mock
      IRaftStateStore stateStorage;
      @Mock
      Logger logger;
      private AutoCloseable closeable;
  
      @BeforeMethod
      public void setup() {
          closeable = MockitoAnnotations.openMocks(this);
          readProgressTracker = new ReadProgressTracker(stateStorage, logger);
      }
  
      @AfterMethod
      public void releaseMocks() throws Exception {
          closeable.close();
      }
  
      @Test
      public void testHighestReadIndexAfterInit() {
          assertEquals(readProgressTracker.highestReadIndex(), 0);
      }
  
      @Test
      public void testAdd() {
          when(stateStorage.latestClusterConfig()).thenReturn(ClusterConfig.newBuilder()
              .addVoters("V1")
              .addVoters("V2")
              .addVoters("V3")
              .build());
          CompletableFuture<Long> onDone = new CompletableFuture<>();
          readProgressTracker.add(5L, onDone);
          assertEquals(readProgressTracker.underConfirming(), 1);
          assertFalse(onDone.isDone());
  
          onDone = new CompletableFuture<>();
          readProgressTracker.add(5L, onDone);
          assertEquals(readProgressTracker.underConfirming(), 2);
          assertFalse(onDone.isDone());
  
          onDone = new CompletableFuture<>();
          readProgressTracker.add(6L, onDone);
          assertEquals(readProgressTracker.underConfirming(), 3);
          assertFalse(onDone.isDone());
      }
  
      @Test
      public void testAbort() {
          when(stateStorage.latestClusterConfig()).thenReturn(ClusterConfig.newBuilder()
              .addVoters("V1")
              .addVoters("V2")
              .addVoters("V3")
              .build());
  
          CompletableFuture<Long> onDone1 = new CompletableFuture<>();
          readProgressTracker.add(5L, onDone1);
  
          CompletableFuture<Long> onDone2 = new CompletableFuture<>();
          readProgressTracker.add(5L, onDone2);
  
          CompletableFuture<Long> onDone3 = new CompletableFuture<>();
          readProgressTracker.add(6L, onDone3);
          readProgressTracker.abort(ReadIndexException.leaderStepDown());
          assertEquals(readProgressTracker.underConfirming(), 0);
          assertTrue(onDone1.isCompletedExceptionally());
          assertTrue(onDone2.isCompletedExceptionally());
          assertTrue(onDone3.isCompletedExceptionally());
      }
  
      @Test
      public void testConfirm() {
          try {
              readProgressTracker.confirm(-1L, "FakePeer");
          } catch (Exception e) {
              fail();
          }
          when(stateStorage.latestClusterConfig()).thenReturn(ClusterConfig.newBuilder()
              .addVoters("V1")
              .addVoters("V2")
              .addVoters("V3")
              .build());
  
          CompletableFuture<Long> onDone1 = new CompletableFuture<>();
          readProgressTracker.add(5L, onDone1);
  
          CompletableFuture<Long> onDone2 = new CompletableFuture<>();
          readProgressTracker.add(5L, onDone2);
  
          CompletableFuture<Long> onDone3 = new CompletableFuture<>();
          readProgressTracker.add(6L, onDone3);
  
          CompletableFuture<Long> onDone4 = new CompletableFuture<>();
          readProgressTracker.add(7L, onDone4);
  
          readProgressTracker.confirm(6L, "V1");
          assertFalse(onDone1.isDone());
          assertFalse(onDone2.isDone());
          assertFalse(onDone3.isDone());
          assertFalse(onDone4.isDone());
          readProgressTracker.confirm(6L, "V2");
          assertTrue(onDone1.isDone());
          assertTrue(onDone2.isDone());
          assertTrue(onDone3.isDone());
          assertFalse(onDone4.isDone());
          assertEquals(readProgressTracker.underConfirming(), 1);
          readProgressTracker.confirm(7L, "V2");
          assertFalse(onDone4.isDone());
          readProgressTracker.confirm(7L, "V3");
          assertTrue(onDone4.isDone());
          assertEquals(readProgressTracker.underConfirming(), 0);
      }
  }
  