code: /*
   * 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.skywalking.oap.server.storage.plugin.banyandb.util;
  
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.Test;
  
  public class ByteUtilTest {
      @Test
      public void testConvertDoubleAndBackOnce() {
          double pi = 3.14159;
          byte[] data = ByteUtil.double2Bytes(pi);
          Assertions.assertEquals(8, data.length);
          Assertions.assertEquals(pi, ByteUtil.bytes2Double(data), 0.00001);
      }
  
      @Test
      public void testConvertDoubleAndBackTwice() {
          double pi = 3.14159;
          byte[] binaryPI = ByteUtil.double2Bytes(pi);
          Assertions.assertEquals(8, binaryPI.length);
          Assertions.assertEquals(pi, ByteUtil.bytes2Double(binaryPI), 0.00001);
          double e = 2.71828;
          byte[] binaryE = ByteUtil.double2Bytes(e);
          Assertions.assertEquals(8, binaryE.length);
          Assertions.assertEquals(e, ByteUtil.bytes2Double(binaryE), 0.00001);
      }
  }
  