io.zeebe.test.util.BufferWriterUtil Maven / Gradle / Ivy
/*
* Copyright © 2017 camunda services GmbH ([email protected])
*
* Licensed 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 io.zeebe.test.util;
import static org.assertj.core.api.Assertions.assertThat;
import org.agrona.concurrent.UnsafeBuffer;
import io.zeebe.util.ReflectUtil;
import io.zeebe.util.buffer.BufferReader;
import io.zeebe.util.buffer.BufferWriter;
public class BufferWriterUtil
{
public static void assertEqualFieldsAfterWriteAndRead(final T writer, String... fieldNames)
{
final T reader = writeAndRead(writer);
assertThat(reader)
.isEqualToComparingOnlyGivenFields(writer, fieldNames);
}
public static T writeAndRead(final T writer)
{
@SuppressWarnings("unchecked")
final T reader = ReflectUtil.newInstance((Class) writer.getClass());
wrap(writer, reader);
return reader;
}
public static void wrap(BufferWriter writer, BufferReader reader)
{
final UnsafeBuffer buffer = new UnsafeBuffer(new byte[writer.getLength()]);
writer.write(buffer, 0);
reader.wrap(buffer, 0, buffer.capacity());
}
public static T wrap(BufferWriter writer, Class readerClass)
{
final T reader = ReflectUtil.newInstance(readerClass);
wrap(writer, reader);
return reader;
}
}
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