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 io.ray.streaming.state.keystate;
  
  import static org.testng.Assert.assertEquals;
  
  import org.testng.annotations.Test;
  
  public class KeyGroupAssignmentTest {
  
    @Test
    public void testComputeKeyGroupRangeForOperatorIndex() throws Exception {
      KeyGroup keyGroup = KeyGroupAssignment.getKeyGroup(4096, 1, 0);
      assertEquals(keyGroup.getStartIndex(), 0);
      assertEquals(keyGroup.getEndIndex(), 4095);
      assertEquals(keyGroup.size(), 4096);
  
      KeyGroup keyGroup2 = KeyGroupAssignment.getKeyGroup(4096, 2, 0);
      assertEquals(keyGroup2.getStartIndex(), 0);
      assertEquals(keyGroup2.getEndIndex(), 2047);
      assertEquals(keyGroup2.size(), 2048);
  
      keyGroup = KeyGroupAssignment.getKeyGroup(4096, 3, 0);
      assertEquals(keyGroup.getStartIndex(), 0);
      assertEquals(keyGroup.getEndIndex(), 1365);
      assertEquals(keyGroup.size(), 1366);
  
      keyGroup2 = KeyGroupAssignment.getKeyGroup(4096, 3, 1);
      assertEquals(keyGroup2.getStartIndex(), 1366);
      assertEquals(keyGroup2.getEndIndex(), 2730);
      assertEquals(keyGroup2.size(), 1365);
  
      KeyGroup keyGroup3 = KeyGroupAssignment.getKeyGroup(4096, 3, 2);
      assertEquals(keyGroup3.getStartIndex(), 2731);
      assertEquals(keyGroup3.getEndIndex(), 4095);
      assertEquals(keyGroup3.size(), 1365);
    }
  }
  