/**
* 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.
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package org.apache.hadoop.hive.ql.udf.generic;
import junit.framework.TestCase;
import org.apache.hadoop.hive.ql.exec.UDFArgumentTypeException;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredJavaObject;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
public class TestGenericUDFFactorial extends TestCase {
public void testFactorial() throws HiveException {
GenericUDFFactorial udf = new GenericUDFFactorial();
ObjectInspector valueOI0 = PrimitiveObjectInspectorFactory.writableIntObjectInspector;
ObjectInspector[] arguments = { valueOI0 };
udf.initialize(arguments);
// date str
runAndVerify(5, 120L, udf);
runAndVerify(0, 1L, udf);
runAndVerify(20, 2432902008176640000L, udf);
// outside of [0..20] range
runAndVerify(-1, null, udf);
runAndVerify(21, null, udf);
// null input
runAndVerify(null, null, udf);
}
public void testWrongInputType() throws HiveException {
@SuppressWarnings("resource")
GenericUDFFactorial udf = new GenericUDFFactorial();
ObjectInspector valueOI0 = PrimitiveObjectInspectorFactory.writableDoubleObjectInspector;
ObjectInspector[] arguments = { valueOI0 };
try {
udf.initialize(arguments);
assertTrue("GenericUDFFactorial.initialize() shold throw UDFArgumentTypeException", false);
} catch (UDFArgumentTypeException e) {
// UDFArgumentTypeException is expected
}
}
private void runAndVerify(Integer in, Long expResult, GenericUDF udf) throws HiveException {
DeferredObject valueObj0 = new DeferredJavaObject(in != null ? new IntWritable(in) : null);
DeferredObject[] args = { valueObj0 };
LongWritable output = (LongWritable) udf.evaluate(args);
if (expResult == null) {
assertNull("factorial() test ", output);
} else {
assertNotNull("factorial() test ", output);
assertEquals("factorial() test ", expResult.longValue(), output.get());
}
}
}