| /* |
| * 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.apache.beam.vendor.guava.v20_0.com.google.common.base.Preconditions.checkArgument; |
| import static org.hamcrest.Matchers.equalTo; |
| import static org.hamcrest.Matchers.theInstance; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertThat; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.util.Arrays; |
| import java.util.Collections; |
| import java.util.List; |
| import org.apache.beam.sdk.coders.Coder.Context; |
| import org.apache.beam.sdk.testing.CoderProperties; |
| import org.apache.beam.sdk.transforms.windowing.GlobalWindow; |
| import org.apache.beam.sdk.values.TypeDescriptor; |
| import org.apache.beam.vendor.guava.v20_0.com.google.common.collect.ImmutableList; |
| import org.junit.Rule; |
| import org.junit.Test; |
| import org.junit.rules.ExpectedException; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.JUnit4; |
| |
| /** Unit tests for {@link NullableCoder}. */ |
| @RunWith(JUnit4.class) |
| public class NullableCoderTest { |
| |
| private static final Coder<String> TEST_CODER = NullableCoder.of(StringUtf8Coder.of()); |
| |
| private static final List<String> TEST_VALUES = |
| Arrays.asList( |
| "", |
| "a", |
| "13", |
| "hello", |
| null, |
| "a longer string with spaces and all that", |
| "a string with a \n newline", |
| "スタリング"); |
| |
| @Test |
| public void testDecodeEncodeContentsInSameOrder() throws Exception { |
| for (String value : TEST_VALUES) { |
| CoderProperties.coderDecodeEncodeEqual(TEST_CODER, value); |
| } |
| } |
| |
| @Test |
| public void testCoderSerializable() throws Exception { |
| CoderProperties.coderSerializable(TEST_CODER); |
| } |
| |
| @Test |
| public void testCoderIsSerializableWithWellKnownCoderType() throws Exception { |
| CoderProperties.coderSerializable(NullableCoder.of(GlobalWindow.Coder.INSTANCE)); |
| } |
| |
| /** |
| * Generated data to check that the wire format has not changed. To regenerate, see {@code |
| * PrintBase64Encodings}. |
| * |
| * @see org.apache.beam.sdk.coders.PrintBase64Encodings |
| */ |
| private static final List<String> TEST_ENCODINGS = |
| Arrays.asList( |
| "AQ", |
| "AWE", |
| "ATEz", |
| "AWhlbGxv", |
| "AA", |
| "AWEgbG9uZ2VyIHN0cmluZyB3aXRoIHNwYWNlcyBhbmQgYWxsIHRoYXQ", |
| "AWEgc3RyaW5nIHdpdGggYSAKIG5ld2xpbmU", |
| "AeOCueOCv-ODquODs-OCsA"); |
| |
| @Test |
| public void testWireFormatEncode() throws Exception { |
| CoderProperties.coderEncodesBase64(TEST_CODER, TEST_VALUES, TEST_ENCODINGS); |
| } |
| |
| @Test |
| public void testEncodedSize() throws Exception { |
| NullableCoder<Double> coder = NullableCoder.of(DoubleCoder.of()); |
| assertEquals(1, coder.getEncodedElementByteSize(null)); |
| assertEquals(9, coder.getEncodedElementByteSize(5.0)); |
| } |
| |
| @Test |
| public void testEncodedSizeNested() throws Exception { |
| NullableCoder<String> varLenCoder = NullableCoder.of(StringUtf8Coder.of()); |
| assertEquals(1, varLenCoder.getEncodedElementByteSize(null)); |
| assertEquals(6, varLenCoder.getEncodedElementByteSize("spam")); |
| } |
| |
| @Test |
| public void testObserverIsCheap() throws Exception { |
| NullableCoder<Double> coder = NullableCoder.of(DoubleCoder.of()); |
| assertTrue(coder.isRegisterByteSizeObserverCheap(5.0)); |
| } |
| |
| @Test |
| public void testObserverIsNotCheap() throws Exception { |
| NullableCoder<List<String>> coder = NullableCoder.of(ListCoder.of(StringUtf8Coder.of())); |
| assertFalse(coder.isRegisterByteSizeObserverCheap(ImmutableList.of("hi", "test"))); |
| } |
| |
| @Test |
| public void testObserverIsAlwaysCheapForNullValues() throws Exception { |
| NullableCoder<List<String>> coder = NullableCoder.of(ListCoder.of(StringUtf8Coder.of())); |
| assertTrue(coder.isRegisterByteSizeObserverCheap(null)); |
| } |
| |
| @Test |
| public void testStructuralValueConsistentWithEquals() throws Exception { |
| CoderProperties.structuralValueConsistentWithEquals(TEST_CODER, null, null); |
| } |
| |
| @Rule public ExpectedException thrown = ExpectedException.none(); |
| |
| @Test |
| public void testDecodingError() throws Exception { |
| thrown.expect(CoderException.class); |
| thrown.expectMessage( |
| equalTo("NullableCoder expects either a byte valued 0 (null) " + "or 1 (present), got 5")); |
| |
| InputStream input = new ByteArrayInputStream(new byte[] {5}); |
| TEST_CODER.decode(input, Coder.Context.OUTER); |
| } |
| |
| @Test |
| public void testSubcoderRecievesEntireStream() throws Exception { |
| NullableCoder<String> coder = NullableCoder.of(new EntireStreamExpectingCoder()); |
| |
| CoderProperties.coderDecodeEncodeEqualInContext(coder, Context.OUTER, null); |
| CoderProperties.coderDecodeEncodeEqualInContext(coder, Context.OUTER, "foo"); |
| } |
| |
| @Test |
| public void testNestedNullableCoder() { |
| NullableCoder<Double> coder = NullableCoder.of(DoubleCoder.of()); |
| assertThat(NullableCoder.of(coder), theInstance(coder)); |
| } |
| |
| @Test |
| public void testEncodedTypeDescriptor() throws Exception { |
| assertThat(TEST_CODER.getEncodedTypeDescriptor(), equalTo(TypeDescriptor.of(String.class))); |
| } |
| |
| private static class EntireStreamExpectingCoder extends AtomicCoder<String> { |
| @Override |
| public void encode(String value, OutputStream outStream) throws IOException { |
| encode(value, outStream, Context.NESTED); |
| } |
| |
| @Override |
| public void encode(String value, OutputStream outStream, Context context) throws IOException { |
| checkArgument(context.isWholeStream, "Expected to get entire stream"); |
| StringUtf8Coder.of().encode(value, outStream, context); |
| } |
| |
| @Override |
| public String decode(InputStream inStream) throws CoderException, IOException { |
| return decode(inStream, Context.NESTED); |
| } |
| |
| @Override |
| public String decode(InputStream inStream, Context context) throws CoderException, IOException { |
| checkArgument(context.isWholeStream, "Expected to get entire stream"); |
| return StringUtf8Coder.of().decode(inStream, context); |
| } |
| |
| @Override |
| public List<? extends Coder<?>> getCoderArguments() { |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public void verifyDeterministic() throws NonDeterministicException {} |
| } |
| } |