lang/java/trevni/core/src/test/java/org/apache/trevni/TestInputBytes.java

/**
 * 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.trevni;

import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.Arrays;

import org.junit.Assert;
import org.junit.Test;

public class TestInputBytes {

  private static final int SIZE = 1000;
  private static final int COUNT = 100;

  @Test public void testRandomReads() throws Exception {
    Random random = new Random();
    int length = random.nextInt(SIZE);
    byte[] data = new byte[length];
    random.nextBytes(data);

    Input in = new InputBytes(data);

    for (int i = 0; i < COUNT; i++) {
      int p = random.nextInt(length);
      int l = Math.min(random.nextInt(SIZE/10), length-p);
      byte[] buffer = new byte[l];
      in.read(p, buffer, 0, l);
      Assert.assertArrayEquals(Arrays.copyOfRange(data, p, p+l), buffer);
    }
  }
}