/*
* 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.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import com.google.common.collect.ImmutableList;
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.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 List<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);
}
}