/*
* Copyright 2010 The Apache Software Foundation
*
* 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.hbase;
import junit.framework.Assert;
import junit.framework.TestCase;
import org.apache.hadoop.hbase.client.idx.exp.Comparison;
import org.apache.hadoop.hbase.client.idx.exp.Expression;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.io.DataInputBuffer;
import org.apache.hadoop.io.DataOutputBuffer;
import java.io.IOException;
/**
* Tests the {@link org.apache.hadoop.hbase.WritableHelper}.
*/
public class TestWritableHelper extends TestCase {
/**
* Tests the {@link org.apache.hadoop.hbase.WritableHelper#instanceForName(String,
* Class)} works as expected.
*/
public void testInstanceForName() {
Expression expression = WritableHelper.instanceForName(Comparison.class.getName(), Expression.class);
Assert.assertNotNull("Instance should not be null", expression);
Assert.assertEquals("Wrong class returned", Comparison.class, expression.getClass());
}
/**
* Tests the {@link org.apache.hadoop.hbase.WritableHelper#instanceForName(String,
* Class)} works as expected when an invalid class name is provided.
*/
public void testInstanceForNameInvalidClassName() {
try {
WritableHelper.instanceForName(Comparison.class.getName() + "1", Expression.class);
Assert.fail("An exception should have been thrown");
} catch (Exception e) {
Assert.assertEquals("Wrong exception was thrown", IllegalArgumentException.class, e.getClass());
}
}
/**
* Tests the that {@link org.apache.hadoop.hbase.WritableHelper#writeInstance(java.io.DataOutput,
* org.apache.hadoop.io.Writable)} fails as expected when null is provided.
* @throws IOException if an error occurs
*/
public void testWriteInstanceFailsWithNull() throws IOException {
DataOutputBuffer dataOutputBuffer = new DataOutputBuffer();
try {
WritableHelper.writeInstance(dataOutputBuffer, null);
Assert.fail("Expected an exception");
} catch (Exception e) {
Assert.assertEquals("Wrong exception thrown when null was provided", IllegalArgumentException.class, e.getClass());
}
}
/**
* Tests the that {@link org.apache.hadoop.hbase.WritableHelper#writeInstance(java.io.DataOutput,
* org.apache.hadoop.io.Writable)} and {@link org.apache.hadoop.hbase.WritableHelper#readInstance(java.io.DataInput,
* Class)} works as expected.
* @throws IOException if an error occurs
*/
public void testWriteReadInstance() throws IOException {
Expression expression = Expression.comparison("columnName1", "qualifier1", Comparison.Operator.EQ, Bytes.toBytes("value"));
DataOutputBuffer dataOutputBuffer = new DataOutputBuffer();
WritableHelper.writeInstance(dataOutputBuffer, expression);
DataInputBuffer dataInputBuffer = new DataInputBuffer();
dataInputBuffer.reset(dataOutputBuffer.getData(), dataOutputBuffer.getLength());
Expression clonedExpression = WritableHelper.readInstance(dataInputBuffer, Expression.class);
Assert.assertEquals("The expression was not the same after being written and read", expression, clonedExpression);
}
/**
* Tests the that {@link org.apache.hadoop.hbase.WritableHelper#writeInstanceNullable(java.io.DataOutput,
* org.apache.hadoop.io.Writable)} and {@link org.apache.hadoop.hbase.WritableHelper#readInstanceNullable(java.io.DataInput,
* Class)} works as expected.
* @throws IOException if an error occurs
*/
public void testWriteReadInstanceNullable() throws IOException {
Expression expression = Expression.comparison("columnName1", "qualifier1", Comparison.Operator.EQ, Bytes.toBytes("value"));
DataOutputBuffer dataOutputBuffer = new DataOutputBuffer();
WritableHelper.writeInstanceNullable(dataOutputBuffer, expression);
DataInputBuffer dataInputBuffer = new DataInputBuffer();
dataInputBuffer.reset(dataOutputBuffer.getData(), dataOutputBuffer.getLength());
Expression clonedExpression = WritableHelper.readInstanceNullable(dataInputBuffer, Expression.class);
Assert.assertEquals("The expression was not the same after being written and read", expression, clonedExpression);
}
/**
* Tests the that {@link org.apache.hadoop.hbase.WritableHelper#writeInstanceNullable(java.io.DataOutput,
* org.apache.hadoop.io.Writable)} and {@link org.apache.hadoop.hbase.WritableHelper#readInstanceNullable(java.io.DataInput,
* Class)} works as expected when null is provided.
* @throws IOException if an error occurs
*/
public void testWriteReadInstanceNullableWithNull() throws IOException {
DataOutputBuffer dataOutputBuffer = new DataOutputBuffer();
WritableHelper.writeInstanceNullable(dataOutputBuffer, null);
DataInputBuffer dataInputBuffer = new DataInputBuffer();
dataInputBuffer.reset(dataOutputBuffer.getData(), dataOutputBuffer.getLength());
Expression clonedExpression = WritableHelper.readInstanceNullable(dataInputBuffer, Expression.class);
Assert.assertNull("A null value was expected", clonedExpression);
}
}