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.store.range.hinter;
  
  import static org.mockito.Mockito.when;
  import static org.testng.Assert.assertEquals;
  import static org.testng.Assert.assertTrue;
  
  import org.apache.bifromq.basekv.MockableTest;
  import org.apache.bifromq.basekv.store.api.IKVLoadRecord;
  import org.apache.bifromq.basekv.store.range.IKVLoadRecorder;
  import org.apache.bifromq.basekv.store.range.KVLoadRecorder;
  import com.google.protobuf.ByteString;
  import java.util.function.Supplier;
  import org.mockito.Mock;
  import org.testng.annotations.Test;
  
  public class LoadRecorderTest extends MockableTest {
      @Mock
      private Supplier<Long> nanoSource;
  
      @Test
      public void initState() {
          when(nanoSource.get()).thenReturn(10L);
          IKVLoadRecorder recorder = new KVLoadRecorder(nanoSource);
          IKVLoadRecord record = recorder.stop();
          assertEquals(record.getKVIONanos(), 0);
          assertEquals(record.getKVIOs(), 0);
          assertEquals(record.startNanos(), 10L);
          assertTrue(record.keyDistribution().isEmpty());
      }
  
      @Test
      public void record() {
          when(nanoSource.get()).thenReturn(10L);
          IKVLoadRecorder recorder = new KVLoadRecorder(nanoSource);
          recorder.record(1);
          recorder.record(ByteString.copyFromUtf8("key1"), 1L);
          recorder.record(ByteString.copyFromUtf8("key1"), 2L);
          recorder.record(ByteString.copyFromUtf8("key2"), 1L);
  
          IKVLoadRecord record = recorder.stop();
          assertEquals(record.getKVIONanos(), 5);
          assertEquals(record.getKVIOs(), 4);
          assertEquals(record.startNanos(), 10L);
          assertEquals(record.keyDistribution().size(), 2);
          recorder.stop();
      }
  }
  