| /* |
| * 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.coders; |
| |
| import static org.junit.Assert.assertArrayEquals; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| import org.apache.beam.sdk.testing.CoderProperties; |
| import org.apache.beam.sdk.transforms.windowing.GlobalWindow; |
| import org.apache.beam.sdk.util.CoderUtils; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.ImmutableList; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Tests for {@link LengthPrefixCoder}. */ |
| @RunWith(JUnit4.class) |
| public class LengthPrefixCoderTest { |
| private static final StructuredCoder<byte[]> TEST_CODER = |
| LengthPrefixCoder.of(ByteArrayCoder.of()); |
| |
| private static final List<byte[]> TEST_VALUES = |
| Arrays.asList( |
| new byte[] {0xa, 0xb, 0xc}, new byte[] {0xd, 0x3}, new byte[] {0xd, 0xe}, new byte[] {}); |
| |
| /** |
| * Generated data to check that the wire format has not changed. To regenerate, see {@link |
| * org.apache.beam.sdk.coders.PrintBase64Encodings}. |
| */ |
| private static final ImmutableList<String> TEST_ENCODINGS = |
| ImmutableList.of("AwoLDA", "Ag0D", "Ag0O", "AA"); |
| |
| @Test |
| public void testCoderSerializable() throws Exception { |
| CoderProperties.coderSerializable(TEST_CODER); |
| } |
| |
| @Test |
| public void testCoderIsSerializableWithWellKnownCoderType() throws Exception { |
| CoderProperties.coderSerializable(LengthPrefixCoder.of(GlobalWindow.Coder.INSTANCE)); |
| } |
| |
| @Test |
| public void testEncodedSize() throws Exception { |
| assertEquals(5L, TEST_CODER.getEncodedElementByteSize(TEST_VALUES.get(0))); |
| } |
| |
| @Test |
| public void testObserverIsCheap() throws Exception { |
| LengthPrefixCoder<Double> coder = LengthPrefixCoder.of(DoubleCoder.of()); |
| assertTrue(coder.isRegisterByteSizeObserverCheap(5.0)); |
| } |
| |
| @Test |
| public void testObserverIsNotCheap() throws Exception { |
| LengthPrefixCoder<List<String>> coder = |
| LengthPrefixCoder.of(ListCoder.of(StringUtf8Coder.of())); |
| assertFalse(coder.isRegisterByteSizeObserverCheap(ImmutableList.of("hi", "test"))); |
| } |
| |
| @Test |
| public void testDecodeEncodeEquals() throws Exception { |
| for (byte[] value : TEST_VALUES) { |
| CoderProperties.coderDecodeEncodeEqual(TEST_CODER, value); |
| } |
| } |
| |
| @Test |
| public void testRegisterByteSizeObserver() throws Exception { |
| CoderProperties.testByteCount( |
| LengthPrefixCoder.of(VarIntCoder.of()), Coder.Context.NESTED, new Integer[] {0, 10, 1000}); |
| } |
| |
| @Test |
| public void testStructuralValueConsistentWithEquals() throws Exception { |
| for (byte[] value1 : TEST_VALUES) { |
| for (byte[] value2 : TEST_VALUES) { |
| CoderProperties.structuralValueConsistentWithEquals(TEST_CODER, value1, value2); |
| } |
| } |
| } |
| |
| @Test |
| public void testWireFormatEncode() throws Exception { |
| CoderProperties.coderEncodesBase64(TEST_CODER, TEST_VALUES, TEST_ENCODINGS); |
| } |
| |
| @Test |
| public void testMultiCoderCycle() throws Exception { |
| LengthPrefixCoder<Long> lengthPrefixedValueCoder = |
| LengthPrefixCoder.of(BigEndianLongCoder.of()); |
| |
| LengthPrefixCoder<byte[]> lengthPrefixedBytesCoder = LengthPrefixCoder.of(ByteArrayCoder.of()); |
| |
| // [0x08, 0, 0, 0, 0, 0, 0, 0, 0x16] |
| byte[] userEncoded = CoderUtils.encodeToByteArray(lengthPrefixedValueCoder, 22L); |
| |
| // [0, 0, 0, 0, 0, 0, 0, 0x16] |
| byte[] decodedToBytes = CoderUtils.decodeFromByteArray(lengthPrefixedBytesCoder, userEncoded); |
| |
| // [0x08, 0, 0, 0, 0, 0, 0, 0, 0x16] |
| byte[] reencodedBytes = CoderUtils.encodeToByteArray(lengthPrefixedBytesCoder, decodedToBytes); |
| |
| long userDecoded = CoderUtils.decodeFromByteArray(lengthPrefixedValueCoder, reencodedBytes); |
| |
| assertFalse( |
| "Length-prefix decoding to bytes should drop the length", |
| Arrays.equals(userEncoded, decodedToBytes)); |
| assertArrayEquals(userEncoded, reencodedBytes); |
| assertEquals(22L, userDecoded); |
| } |
| } |