/**
* 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.hadoop.hdfs.server.namenode.bookkeeper.metadata.proto;
import org.apache.hadoop.hdfs.protocol.FSConstants;
import org.apache.hadoop.hdfs.server.namenode.bookkeeper.metadata.EditLogLedgerMetadata;
import org.junit.Test;
import static junit.framework.Assert.assertEquals;
/**
* Tests the writable class for {@link EditLogLedgerMetadata} to verify that
* serialization is correct.
*/
public class TestEditLogLedgerMetadataWritable {
/**
* Tests that {@link EditLogLedgerMetadata} can be correctly serialized
* and deserialized.
*/
@Test
public void testReadAndWrite() throws Exception {
EditLogLedgerMetadata ledgerMetadataIn = new EditLogLedgerMetadata(
FSConstants.LAYOUT_VERSION, 1, 1, -1);
EditLogLedgerMetadataWritable ledgerMetadataWritableIn =
new EditLogLedgerMetadataWritable();
ledgerMetadataWritableIn.set(ledgerMetadataIn);
// Calls readWriteFields()
byte[] editLogLedgerMedataBytes =
WritableUtil.writableToByteArray(ledgerMetadataWritableIn);
// Calls readFields()
EditLogLedgerMetadataWritable ledgerMetadataWritableOut =
WritableUtil.readWritableFromByteArray(editLogLedgerMedataBytes,
new EditLogLedgerMetadataWritable());
// Tests that deserialize(read(write(serialize(deserialize(m)) == m
EditLogLedgerMetadata ledgerMetadataOut = ledgerMetadataWritableOut.get();
assertEquals(ledgerMetadataIn, ledgerMetadataOut);
}
}