/**
* Copyright 2011-2014 Asakusa Framework Team.
*
* 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 com.asakusafw.runtime.stage.collector;
import static org.hamcrest.Matchers.*;
import static org.junit.Assert.*;
import java.io.IOException;
import java.util.Arrays;
import org.apache.hadoop.io.DataInputBuffer;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.Writable;
import org.junit.Test;
import com.asakusafw.runtime.value.IntOption;
/**
* Test for {@link WritableSlot}.
*/
public class WritableSlotTest {
/**
* {@link WritableSlot}を経由した{@link Writable}の永続化。
* @throws Exception テストに失敗した場合
*/
@SuppressWarnings("deprecation")
@Test
public void loadStore() throws Exception {
WritableSlot slot = new WritableSlot();
IntOption value = new IntOption(100);
IntOption copy = new IntOption();
slot.store(value);
slot.loadTo(copy);
assertThat(copy, is(value));
value.modify(200);
slot.store(value);
slot.loadTo(copy);
assertThat(copy, is(value));
}
/**
* {@link WritableSlot}自体の永続化。
* @throws Exception テストに失敗した場合
*/
@SuppressWarnings("deprecation")
@Test
public void writable() throws Exception {
WritableSlot slot = new WritableSlot();
IntOption value = new IntOption(100);
IntOption copy = new IntOption(200);
slot.store(value);
WritableSlot restored1 = restore(slot);
restored1.loadTo(copy);
assertThat(copy, is(value));
value.modify(200);
slot.store(value);
WritableSlot restored2 = restore(slot);
restored2.loadTo(copy);
assertThat(copy, is(value));
}
@SuppressWarnings("unchecked")
private static <T extends Writable> T restore(T writable) {
try {
return read((T) writable.getClass().newInstance(), write(writable));
} catch (Exception e) {
throw new AssertionError(e);
}
}
static byte[] write(Writable writable) {
DataOutputBuffer buffer = new DataOutputBuffer();
buffer.reset();
try {
writable.write(buffer);
} catch (IOException e) {
throw new AssertionError(e);
}
return Arrays.copyOf(buffer.getData(), buffer.getLength());
}
static <T extends Writable> T read(T writable, byte[] bytes) {
DataInputBuffer buffer = new DataInputBuffer();
buffer.reset(bytes, bytes.length);
try {
writable.readFields(buffer);
assertThat("Enf of Stream", buffer.read(), is(-1));
} catch (IOException e) {
throw new AssertionError(e);
}
return writable;
}
}