/**
* 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.hive.ql.udf;
import junit.framework.TestCase;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
public class TestUDFCrc32 extends TestCase {
public void testCrc32Str() throws HiveException {
UDFCrc32 udf = new UDFCrc32();
runAndVerifyStr("ABC", 2743272264L, udf);
runAndVerifyStr("", 0L, udf);
// repeat again
runAndVerifyStr("ABC", 2743272264L, udf);
runAndVerifyStr("", 0L, udf);
// null
runAndVerifyStr(null, null, udf);
}
public void testCrc32Bin() throws HiveException {
UDFCrc32 udf = new UDFCrc32();
runAndVerifyBin(new byte[] { 65, 66, 67 }, 2743272264L, udf);
runAndVerifyBin(new byte[0], 0L, udf);
// repeat again
runAndVerifyBin(new byte[] { 65, 66, 67 }, 2743272264L, udf);
runAndVerifyBin(new byte[0], 0L, udf);
// null
runAndVerifyBin(null, null, udf);
}
private void runAndVerifyStr(String str, Long expResult, UDFCrc32 udf) throws HiveException {
Text t = str != null ? new Text(str) : null;
LongWritable output = (LongWritable) udf.evaluate(t);
if (expResult == null) {
assertNull(output);
} else {
assertNotNull(output);
assertEquals("crc32() test ", expResult.longValue(), output.get());
}
}
private void runAndVerifyBin(byte[] binV, Long expResult, UDFCrc32 udf) throws HiveException {
BytesWritable binWr = binV != null ? new BytesWritable(binV) : null;
LongWritable output = (LongWritable) udf.evaluate(binWr);
if (expResult == null) {
assertNull(output);
} else {
assertNotNull(output);
assertEquals("crc32() test ", expResult.longValue(), output.get());
}
}
}