| /* |
| * |
| * 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.bookkeeper.util; |
| |
| import java.nio.ByteBuffer; |
| import java.util.Random; |
| |
| import org.junit.Assert; |
| import org.junit.Test; |
| |
| /** |
| * Testcases for ZeroBuffer. |
| */ |
| public class TestZeroBuffer { |
| |
| @Test |
| public void testPut() { |
| ByteBuffer testBuffer; |
| byte[] testBufferArray; |
| Random rand = new Random(); |
| |
| // Test1 - trying ZeroBuffer.put on small sized TestBuffer |
| testBuffer = ByteBuffer.allocate(5); |
| testBufferArray = testBuffer.array(); |
| testBufferArray[4] = 7; |
| Assert.assertFalse("Test1 - It is supposed to contain non-zero byte", isFilledWithZeros(testBufferArray, 0, 5)); |
| ZeroBuffer.put(testBuffer); |
| Assert.assertTrue("Test1 - After calling, ZeroBuffer.put There aren't supposed to be non-zero bytes", |
| isFilledWithZeros(testBufferArray, 0, 5)); |
| |
| // Test2 - trying ZeroBuffer.put on 64*1024 sized TestBuffer |
| testBuffer = ByteBuffer.allocate(64 * 1024); |
| testBufferArray = testBuffer.array(); |
| rand.nextBytes(testBufferArray); |
| Assert.assertFalse("Test2 - It is supposed to contain random non-zero bytes", |
| isFilledWithZeros(testBufferArray, 0, 64 * 1024)); |
| ZeroBuffer.put(testBuffer); |
| Assert.assertTrue("Test2 - After calling, ZeroBuffer.put There aren't supposed to be non-zero bytes", |
| isFilledWithZeros(testBufferArray, 0, 64 * 1024)); |
| |
| // Test3 - trying ZeroBuffer.put on portion (64*1024) of large sized |
| // TestBuffer (256*1024) |
| testBuffer = ByteBuffer.allocate(256 * 1024); |
| testBufferArray = testBuffer.array(); |
| rand.nextBytes(testBufferArray); |
| Assert.assertFalse("Test3 - It is supposed to contain random non-zero bytes", |
| isFilledWithZeros(testBufferArray, 64 * 1024, 64 * 1024)); |
| testBuffer.position(64 * 1024); |
| ZeroBuffer.put(testBuffer, 64 * 1024); |
| Assert.assertTrue( |
| "Test3 - After calling, ZeroBuffer.put There aren't supposed to be non-zero bytes " |
| + "in the particular section", isFilledWithZeros(testBufferArray, 64 * 1024, 64 * 1024)); |
| Assert.assertFalse("Test3 - After calling, ZeroBuffer.put other sections shouldnt be touched", |
| isFilledWithZeros(testBufferArray, 0, 64 * 1024)); |
| Assert.assertFalse("Test3 - After calling, ZeroBuffer.put other sections shouldnt be touched", |
| isFilledWithZeros(testBufferArray, 128 * 1024, 128 * 1024)); |
| } |
| |
| @Test |
| public void testReadOnlyBuffer() { |
| ByteBuffer testReadOnlyBuffer; |
| byte[] testBufferArray; |
| |
| // Test1 - trying ZeroBuffer.readOnlyBuffer for small size |
| testReadOnlyBuffer = ZeroBuffer.readOnlyBuffer(5); |
| Assert.assertTrue( |
| "Test1 - ReadOnlyBuffer should have remaining 5 bytes but it has " + testReadOnlyBuffer.remaining(), |
| testReadOnlyBuffer.remaining() == 5); |
| testBufferArray = new byte[5]; |
| testReadOnlyBuffer.get(testBufferArray); |
| Assert.assertTrue("Test1 - supposed to contain only zero bytes", isFilledWithZeros(testBufferArray, 0, 5)); |
| |
| // Test2 - trying ZeroBuffer.readOnlyBuffer for 64*1024 |
| testReadOnlyBuffer = ZeroBuffer.readOnlyBuffer(64 * 1024); |
| Assert.assertTrue("Test2 - ReadOnlyBuffer should have remaining 64*1024 bytes but it has " |
| + testReadOnlyBuffer.remaining(), testReadOnlyBuffer.remaining() == 64 * 1024); |
| testBufferArray = new byte[64 * 1024]; |
| testReadOnlyBuffer.get(testBufferArray); |
| Assert.assertTrue("Test2 - supposed to contain only zero bytes", |
| isFilledWithZeros(testBufferArray, 0, 64 * 1024)); |
| |
| // Test3 - trying ZeroBuffer.readOnlyBuffer for > 64*1024 |
| testReadOnlyBuffer = ZeroBuffer.readOnlyBuffer(128 * 1024); |
| Assert.assertTrue("Test3 - ReadOnlyBuffer should have remaining 128*1024 bytes but it has " |
| + testReadOnlyBuffer.remaining(), testReadOnlyBuffer.remaining() == 128 * 1024); |
| testBufferArray = new byte[128 * 1024]; |
| testReadOnlyBuffer.get(testBufferArray); |
| Assert.assertTrue("Test3 - supposed to contain only zero bytes", |
| isFilledWithZeros(testBufferArray, 0, 128 * 1024)); |
| } |
| |
| boolean isFilledWithZeros(byte[] byteArray, int start, int length) { |
| for (int i = start; i < (start + length); i++) { |
| if (byteArray[i] != 0) { |
| return false; |
| } |
| } |
| return true; |
| } |
| } |