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.celeborn.common.unsafe;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  public class PlatformUtilSuite {
  
    @Test
    public void overlappingCopyMemory() {
      byte[] data = new byte[3 * 1024 * 1024];
      int size = 2 * 1024 * 1024;
      for (int i = 0; i < data.length; ++i) {
        data[i] = (byte) i;
      }
  
      Platform.copyMemory(data, Platform.BYTE_ARRAY_OFFSET, data, Platform.BYTE_ARRAY_OFFSET, size);
      for (int i = 0; i < data.length; ++i) {
        Assert.assertEquals((byte) i, data[i]);
      }
  
      Platform.copyMemory(
          data, Platform.BYTE_ARRAY_OFFSET + 1, data, Platform.BYTE_ARRAY_OFFSET, size);
      for (int i = 0; i < size; ++i) {
        Assert.assertEquals((byte) (i + 1), data[i]);
      }
  
      for (int i = 0; i < data.length; ++i) {
        data[i] = (byte) i;
      }
      Platform.copyMemory(
          data, Platform.BYTE_ARRAY_OFFSET, data, Platform.BYTE_ARRAY_OFFSET + 1, size);
      for (int i = 0; i < size; ++i) {
        Assert.assertEquals((byte) i, data[i + 1]);
      }
    }
  
    @Test
    public void testUnsafe() {
      boolean[] bytes = new boolean[2];
  
      Platform.putBoolean(bytes, Platform.BYTE_ARRAY_OFFSET, true);
      Platform.putBoolean(bytes, Platform.BYTE_ARRAY_OFFSET + 1, false);
      Assert.assertEquals(bytes[0], true);
      Assert.assertEquals(bytes[1], false);
  
      byte[] buf1 = new byte[2];
      Platform.putByte(buf1, Platform.BYTE_ARRAY_OFFSET, (byte) 123);
      Platform.putByte(buf1, Platform.BYTE_ARRAY_OFFSET + 1, (byte) 78);
      Assert.assertEquals(buf1[0], (byte) 123);
      Assert.assertEquals(buf1[1], (byte) 78);
  
      short[] buf2 = new short[2];
      Platform.putShort(buf2, Platform.SHORT_ARRAY_OFFSET, (short) 123);
      Platform.putShort(buf2, Platform.SHORT_ARRAY_OFFSET + 2, (short) 243);
      Assert.assertEquals(buf2[0], 123);
      Assert.assertEquals(buf2[1], 243);
  
      long[] buf3 = new long[2];
      Platform.putLong(buf3, Platform.SHORT_ARRAY_OFFSET, 123L);
      Platform.putLong(buf3, Platform.SHORT_ARRAY_OFFSET + 8, 238759234L);
      Assert.assertEquals(buf3[0], 123L);
      Assert.assertEquals(buf3[1], 238759234L);
  
      float[] buf4 = new float[2];
      Platform.putFloat(buf4, Platform.SHORT_ARRAY_OFFSET, 1234.1f);
      Platform.putFloat(buf4, Platform.SHORT_ARRAY_OFFSET + 4, 2234.123f);
      Assert.assertTrue(buf4[0] - 1234.1f < 0.00000001);
      Assert.assertTrue(buf4[0] - 2234.123f < 0.00000001);
  
      double[] buf5 = new double[2];
      Platform.putDouble(buf5, Platform.DOUBLE_ARRAY_OFFSET, 3245.32);
      Platform.putDouble(buf5, Platform.DOUBLE_ARRAY_OFFSET + 8, 723453.123);
      Assert.assertTrue(buf5[0] - 3245.32 < 0.00000001);
      Assert.assertTrue(buf5[0] - 723453.123 < 0.00000001);
    }
  }
  