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.datasketches.memory.internal;
  
  import static org.testng.Assert.assertEquals;
  
  import java.nio.ByteOrder;
  
  import org.apache.datasketches.memory.Memory;
  import org.apache.datasketches.memory.WritableMemory;
  import org.testng.annotations.Test;
  
  /**
   * @author Lee Rhodes
   */
  public class NonNativeWritableMemoryImplTest {
    private byte[] bArr = new byte[8];
    private final WritableMemory wmem = WritableMemory.writableWrap(bArr, ByteOrder.BIG_ENDIAN);
  
  //Check primitives
    @Test
    public void checkCharacters() {
      int m = Character.BYTES;
      int n = ((1 << 20) / m) + m;
      byte[] arr1 = new byte[n * m]; //non-native
      //put & get
      WritableMemory wmem1 = WritableMemory.writableWrap(arr1, ByteOrder.BIG_ENDIAN);
      for (int i = 0; i < n; i++) { wmem1.putChar(i * m, (char) i++); }
      for (int i = 0; i < n; i++) {
        assertEquals(wmem1.getChar(i * m), (char) i++);
      }
      //getArr & putArr
      char[] cArr = new char[n]; //native
      wmem1.getCharArray(0, cArr, 0, n); //wmem is non-native
      byte[] arr2 = new byte[n * m];
      WritableMemory wmem2 = WritableMemory.writableWrap(arr2, ByteOrder.BIG_ENDIAN);
      wmem2.putCharArray(0, cArr, 0, n);
      assertEquals(arr2, arr1);
    }
  
    @Test
    public void checkDoubles() {
      int m = Double.BYTES;
      int n = ((1 << 20) / m) + m;
      byte[] arr1 = new byte[n * m]; //non-native
      //put & get
      WritableMemory wmem1 = WritableMemory.writableWrap(arr1, ByteOrder.BIG_ENDIAN);
      double dbl = 1.0;
      for (int i = 0; i < n; i++) { wmem1.putDouble(i * m, dbl++); }
      dbl = 1.0;
      for (int i = 0; i < n; i++) {
        assertEquals(wmem1.getDouble(i * m), dbl++);
      }
      //getArr & putArr
      double[] dblArr = new double[n]; //native
      wmem1.getDoubleArray(0, dblArr, 0, n); //wmem is non-native
      byte[] arr2 = new byte[n * m];
      WritableMemory wmem2 = WritableMemory.writableWrap(arr2, ByteOrder.BIG_ENDIAN);
      wmem2.putDoubleArray(0, dblArr, 0, n);
      assertEquals(arr2, arr1);
    }
  
    @Test
    public void checkFloats() {
      int m = Float.BYTES;
      int n = ((1 << 20) / m) + m;
      byte[] arr1 = new byte[n * m]; //non-native
      //put & get
      WritableMemory wmem1 = WritableMemory.writableWrap(arr1, ByteOrder.BIG_ENDIAN);
      float flt = 1.0F;
      for (int i = 0; i < n; i++) { wmem1.putFloat(i * m, flt++); }
      flt = 1.0F;
      for (int i = 0; i < n; i++) {
        assertEquals(wmem1.getFloat(i * m), flt++);
      }
      //getArr & putArr
      float[] fltArr = new float[n]; //native
      wmem1.getFloatArray(0, fltArr, 0, n); //wmem is non-native
      byte[] arr2 = new byte[n * m];
      WritableMemory wmem2 = WritableMemory.writableWrap(arr2, ByteOrder.BIG_ENDIAN);
      wmem2.putFloatArray(0, fltArr, 0, n);
      assertEquals(arr2, arr1);
    }
  
    @Test
    public void checkInts() {
      int m = Integer.BYTES;
      int n = ((1 << 20) / m) + m;
      byte[] arr1 = new byte[n * m]; //non-native
      //put & get
      WritableMemory wmem1 = WritableMemory.writableWrap(arr1, ByteOrder.BIG_ENDIAN);
      int intg = 1;
      for (int i = 0; i < n; i++) { wmem1.putInt(i * m, intg++); }
      intg = 1;
      for (int i = 0; i < n; i++) {
        assertEquals(wmem1.getInt(i * m), intg++);
      }
      //getArr & putArr
      int[] intArr = new int[n]; //native
      wmem1.getIntArray(0, intArr, 0, n); //wmem is non-native
      byte[] arr2 = new byte[n * m];
      WritableMemory wmem2 = WritableMemory.writableWrap(arr2, ByteOrder.BIG_ENDIAN);
      wmem2.putIntArray(0, intArr, 0, n);
      assertEquals(arr2, arr1);
    }
  
    @Test
    public void checkLongs() {
      int m = Long.BYTES;
      int n = ((1 << 20) / m) + m;
      byte[] arr1 = new byte[n * m]; //non-native
      //put & get
      WritableMemory wmem1 = WritableMemory.writableWrap(arr1, ByteOrder.BIG_ENDIAN);
      long lng = 1;
      for (int i = 0; i < n; i++) { wmem1.putLong(i * m, lng++); }
      lng = 1;
      for (int i = 0; i < n; i++) {
        assertEquals(wmem1.getLong(i * m), lng++);
      }
      //getArr & putArr
      long[] longArr = new long[n]; //native
      wmem1.getLongArray(0, longArr, 0, n); //wmem is non-native
      byte[] arr2 = new byte[n * m];
      WritableMemory wmem2 = WritableMemory.writableWrap(arr2, ByteOrder.BIG_ENDIAN);
      wmem2.putLongArray(0, longArr, 0, n);
      assertEquals(arr2, arr1);
    }
  
    @Test
    public void checkShorts() {
      int m = Short.BYTES;
      int n = ((1 << 20) / m) + m;
      byte[] arr1 = new byte[n * m]; //non-native
      //put & get
      WritableMemory wmem1 = WritableMemory.writableWrap(arr1, ByteOrder.BIG_ENDIAN);
      short sht = 1;
      for (int i = 0; i < n; i++) { wmem1.putShort(i * m, sht++); }
      sht = 1;
      for (int i = 0; i < n; i++) {
        assertEquals(wmem1.getShort(i * m), sht++);
      }
      //getArr & putArr
      short[] shortArr = new short[n]; //native
      wmem1.getShortArray(0, shortArr, 0, n); //wmem is non-native
      byte[] arr2 = new byte[n * m];
      WritableMemory wmem2 = WritableMemory.writableWrap(arr2, ByteOrder.BIG_ENDIAN);
      wmem2.putShortArray(0, shortArr, 0, n);
      assertEquals(arr2, arr1);
    }
  
    //check Region
    @Test
    public void checkRegion() {
      WritableMemory wreg = wmem.writableRegion(0, wmem.getCapacity());
      assertEquals(wreg.getByteOrder(), ByteOrder.BIG_ENDIAN);
    }
  
    @Test
    public void checkRegionZeros() {
      byte[] bArr1 = new byte[0];
      WritableMemory wmem1 = WritableMemory.writableWrap(bArr1, ByteOrder.BIG_ENDIAN);
      Memory reg = wmem1.region(0, wmem1.getCapacity());
      assertEquals(reg.getByteOrder(), ByteOrder.LITTLE_ENDIAN);
    }
  
  }
  