TestArrayWritable.java
上传用户:quxuerui
上传日期:2018-01-08
资源大小:41811k
文件大小:2k
- /**
- * 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.io;
- import java.io.*;
- import junit.framework.TestCase;
- /** Unit tests for ArrayWritable */
- public class TestArrayWritable extends TestCase {
-
- static class TextArrayWritable extends ArrayWritable {
- public TextArrayWritable() {
- super(Text.class);
- }
- }
-
- public TestArrayWritable(String name) {
- super(name);
- }
-
- /**
- * If valueClass is undefined, readFields should throw an exception indicating
- * that the field is null. Otherwise, readFields should succeed.
- */
- public void testThrowUndefinedValueException() throws IOException {
- // Get a buffer containing a simple text array
- Text[] elements = {new Text("zero"), new Text("one"), new Text("two")};
- TextArrayWritable sourceArray = new TextArrayWritable();
- sourceArray.set(elements);
- // Write it to a normal output buffer
- DataOutputBuffer out = new DataOutputBuffer();
- DataInputBuffer in = new DataInputBuffer();
- sourceArray.write(out);
- // Read the output buffer with TextReadable. Since the valueClass is defined,
- // this should succeed
- TextArrayWritable destArray = new TextArrayWritable();
- in.reset(out.getData(), out.getLength());
- destArray.readFields(in);
- Writable[] destElements = destArray.get();
- assertTrue(destElements.length == elements.length);
- for (int i = 0; i < elements.length; i++) {
- assertEquals(destElements[i],elements[i]);
- }
- }
- }