| /* |
| * 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.beam.sdk.util; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertThrows; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.DataOutputStream; |
| import org.apache.beam.vendor.grpc.v1p43p2.com.google.protobuf.UnsafeByteOperations; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| @RunWith(JUnit4.class) |
| public class ByteStringOutputStreamTest { |
| |
| @Test |
| public void testInvalidInitialCapacity() throws Exception { |
| assertThrows( |
| "Initial capacity < 0", |
| IllegalArgumentException.class, |
| () -> new ByteStringOutputStream(-1)); |
| } |
| |
| @Test |
| public void testWriteBytes() throws Exception { |
| ByteStringOutputStream out = new ByteStringOutputStream(); |
| assertEquals(0, out.size()); |
| for (int numElements = 0; numElements < 1024 * 1024; numElements = next(numElements)) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| DataOutputStream dataOut = new DataOutputStream(baos); |
| try { |
| for (int i = 0; i < numElements; ++i) { |
| dataOut.writeInt(i); |
| } |
| dataOut.close(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| dataOut.close(); |
| byte[] testBuffer = baos.toByteArray(); |
| |
| for (int pos = 0; pos < testBuffer.length; ) { |
| if (testBuffer[pos] == 0) { |
| out.write(testBuffer[pos]); |
| pos += 1; |
| } else { |
| int len = Math.min(testBuffer.length - pos, Math.abs(testBuffer[pos])); |
| out.write(testBuffer, pos, len); |
| pos += len; |
| } |
| assertEquals(pos, out.size()); |
| } |
| assertEquals(UnsafeByteOperations.unsafeWrap(testBuffer), out.toByteString()); |
| assertEquals(UnsafeByteOperations.unsafeWrap(testBuffer), out.toByteStringAndReset()); |
| } |
| } |
| |
| @Test |
| public void testWriteBytesWithZeroInitialCapacity() throws Exception { |
| for (int numElements = 0; numElements < 1024 * 1024; numElements = next(numElements)) { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| DataOutputStream dataOut = new DataOutputStream(baos); |
| try { |
| for (int i = 0; i < numElements; ++i) { |
| dataOut.writeInt(i); |
| } |
| dataOut.close(); |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| dataOut.close(); |
| byte[] testBuffer = baos.toByteArray(); |
| |
| ByteStringOutputStream out = new ByteStringOutputStream(0); |
| assertEquals(0, out.size()); |
| |
| for (int pos = 0; pos < testBuffer.length; ) { |
| if (testBuffer[pos] == 0) { |
| out.write(testBuffer[pos]); |
| pos += 1; |
| } else { |
| int len = Math.min(testBuffer.length - pos, Math.abs(testBuffer[pos])); |
| out.write(testBuffer, pos, len); |
| pos += len; |
| } |
| assertEquals(pos, out.size()); |
| } |
| assertEquals(UnsafeByteOperations.unsafeWrap(testBuffer), out.toByteString()); |
| assertEquals(UnsafeByteOperations.unsafeWrap(testBuffer), out.toByteStringAndReset()); |
| } |
| } |
| |
| // Grow the elements based upon an approximation of the fibonacci sequence. |
| private static int next(int current) { |
| double a = Math.max(1, current * (1 + Math.sqrt(5)) / 2.0); |
| return (int) Math.round(a); |
| } |
| } |