/*
    * 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.giraph.utils;
  
  import org.junit.Assert;
  import org.junit.Test;
  
  import java.io.IOException;
  import java.io.UTFDataFormatException;
  
  import static org.junit.Assert.assertEquals;
  
  public class TestUnsafeByteArrayOutputStream {
      @Test
      public void testWriteBytes() throws IOException {
          UnsafeByteArrayOutputStream os = new UnsafeByteArrayOutputStream();
          int length = os.getByteArray().length;
  
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < length; i++) {
              sb.append("\u00ea");
          }
  
          String s = sb.toString();
          os.writeBytes(s);
  
          UnsafeByteArrayInputStream is = new UnsafeByteArrayInputStream(os.getByteArray());
  
          for (int i = 0; i < s.length(); i++) {
              assertEquals((byte) s.charAt(i), is.readByte());
          }
  
          os.close();
      }
  
      @Test
      public void testWriteChars() throws IOException {
          UnsafeByteArrayOutputStream os = new UnsafeByteArrayOutputStream();
          int length = os.getByteArray().length;
  
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < length; i++) {
              sb.append("\u10ea");
          }
  
          String s = sb.toString();
          os.writeChars(s);
  
          UnsafeByteArrayInputStream is = new UnsafeByteArrayInputStream(os.getByteArray());
  
          for (int i = 0; i < s.length(); i++) {
              assertEquals(s.charAt(i), is.readChar());
          }
  
          os.close();
      }
  
      @Test
      public void testWriteUTF() throws IOException {
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < 20; i++) {
              sb.append("\u06ea");
          }
  
          String s = sb.toString();
  
          assertEquals(s, writeAndReadUTF(s));
      }
  
      @Test
      public void testWriteLongUTF() throws IOException {
          int maxLength = 65535;
          StringBuilder sb = new StringBuilder();
          for (int i = 0; i < maxLength; i++) {
              sb.append("a");
          }
  
          String s = sb.toString();
  
          assertEquals(s, writeAndReadUTF(s));
  
          s = sb.append("a").toString();
          try {
              writeAndReadUTF(s);
             throw new IllegalStateException("Exception expected");
         } catch (Exception e) {
             Assert.assertTrue(e instanceof UTFDataFormatException);
         }
     }
 
     private String writeAndReadUTF(String s) throws IOException {
         UnsafeByteArrayOutputStream os = new UnsafeByteArrayOutputStream();
         os.writeUTF(s);
         os.close();
         UnsafeByteArrayInputStream is = new UnsafeByteArrayInputStream(os.getByteArray());
         return is.readUTF();
     }
 }