| /* |
| * 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.pig; |
| |
| import static junit.framework.Assert.assertNotNull; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.LinkedList; |
| import java.util.NoSuchElementException; |
| |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapreduce.InputFormat; |
| import org.apache.hadoop.mapreduce.Job; |
| import org.apache.hadoop.mapreduce.RecordReader; |
| import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigSplit; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.util.Utils; |
| import org.junit.Test; |
| |
| /** |
| * Tests that the LoadFuncWrapper properly wraps LoadFunc objects |
| */ |
| public class TestLoadFuncWrapper { |
| |
| // Asserts that each call to a Wrapper invokes the correct method on the Wrappee. |
| |
| @Test |
| public void testSucess() throws IOException { |
| |
| DummyLoadFunc loadFunc = new DummyLoadFunc(); |
| MockWrapper wrapper = new MockWrapper(loadFunc); |
| |
| wrapper.relativeToAbsolutePath(null,null); |
| assertEquals("relativeToAbsolutePath", loadFunc.getLastMethodCalled()); |
| |
| wrapper.setLocation(null,null); |
| assertEquals("setLocation", loadFunc.getLastMethodCalled()); |
| |
| wrapper.getInputFormat(); |
| assertEquals("getInputFormat", loadFunc.getLastMethodCalled()); |
| |
| wrapper.getLoadCaster(); |
| assertEquals("getLoadCaster", loadFunc.getLastMethodCalled()); |
| |
| wrapper.prepareToRead(null,null); |
| assertEquals("prepareToRead", loadFunc.getLastMethodCalled()); |
| |
| wrapper.getNext(); |
| assertEquals("getNext", loadFunc.getLastMethodCalled()); |
| |
| wrapper.setUDFContextSignature(null); |
| assertEquals("setUDFContextSignature", loadFunc.getLastMethodCalled()); |
| |
| NoSuchElementException e = null; |
| try { |
| loadFunc.getLastMethodCalled(); |
| } catch (NoSuchElementException ex) { |
| e = ex; |
| } |
| |
| assertNotNull("The wrapped class had more method invokations than it should have", e); |
| } |
| |
| // Asserts that each call to an improperly initialized Wrapper fails. |
| @Test |
| public void testError() throws IOException { |
| MockWrapper wrapper = new MockWrapper(); // <-- !! loadFunc not set !! |
| |
| IllegalArgumentException e = null; |
| try { |
| wrapper.getInputFormat(); |
| } catch (IllegalArgumentException ex) { |
| e = ex; |
| } |
| |
| assertNotNull("A useful exception should have been thrown when a method is called on an " |
| + "improperly initialized LoadFuncWrapper", e); |
| assertTrue("The method name that caused the problem should have been mentioned in the " |
| + "exception, since the stack trace gets swallowed when this occurs", |
| e.getMessage().contains("getInputFormat")); |
| } |
| |
| private static class MockWrapper extends LoadFuncWrapper { |
| private MockWrapper() { } |
| |
| private MockWrapper(LoadFunc loadFunc) { |
| setLoadFunc(loadFunc); |
| } |
| } |
| |
| public static class DummyLoadFunc extends LoadFunc { |
| private LinkedList<String> methodCalls = new LinkedList<String>(); |
| |
| public String getLastMethodCalled() { return methodCalls.pop(); } |
| protected void setLastMethodCalled() { |
| StackTraceElement e[] = Thread.currentThread().getStackTrace(); |
| int index; |
| if (Utils.isVendorIBM()) { |
| index = 3; |
| } else { |
| index = 2; |
| } |
| methodCalls.push(e[index].getMethodName()); |
| } |
| |
| @Override |
| public String relativeToAbsolutePath(String location, Path curDir) { |
| setLastMethodCalled(); |
| return null; |
| } |
| |
| @Override |
| public void setLocation(String location, Job job) throws IOException { |
| setLastMethodCalled(); |
| } |
| @Override |
| public InputFormat getInputFormat() throws IOException { |
| setLastMethodCalled(); |
| return null; |
| } |
| |
| @Override |
| public LoadCaster getLoadCaster() throws IOException { |
| setLastMethodCalled(); |
| return null; |
| } |
| |
| @Override |
| public void prepareToRead(RecordReader reader, PigSplit split) throws IOException { |
| setLastMethodCalled(); |
| } |
| |
| @Override |
| public Tuple getNext() throws IOException { |
| setLastMethodCalled(); |
| return null; |
| } |
| |
| @Override |
| public void setUDFContextSignature(String signature) { |
| setLastMethodCalled(); |
| } |
| |
| } |
| } |