| /** |
| * 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.test; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Arrays; |
| import java.util.Set; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.TimeoutException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.util.StringUtils; |
| import org.junit.Assert; |
| import org.mockito.invocation.InvocationOnMock; |
| import org.mockito.stubbing.Answer; |
| |
| import com.google.common.base.Joiner; |
| import com.google.common.base.Supplier; |
| import com.google.common.collect.Sets; |
| |
| /** |
| * Test provides some very generic helpers which might be used across the tests |
| */ |
| public abstract class GenericTestUtils { |
| |
| /** |
| * Extracts the name of the method where the invocation has happened |
| * @return String name of the invoking method |
| */ |
| public static String getMethodName() { |
| return Thread.currentThread().getStackTrace()[2].getMethodName(); |
| } |
| |
| /** |
| * Assert that a given file exists. |
| */ |
| public static void assertExists(File f) { |
| Assert.assertTrue("File " + f + " should exist", f.exists()); |
| } |
| |
| /** |
| * List all of the files in 'dir' that match the regex 'pattern'. |
| * Then check that this list is identical to 'expectedMatches'. |
| * @throws IOException if the dir is inaccessible |
| */ |
| public static void assertGlobEquals(File dir, String pattern, |
| String ... expectedMatches) throws IOException { |
| |
| Set<String> found = Sets.newTreeSet(); |
| for (File f : FileUtil.listFiles(dir)) { |
| if (f.getName().matches(pattern)) { |
| found.add(f.getName()); |
| } |
| } |
| Set<String> expectedSet = Sets.newTreeSet( |
| Arrays.asList(expectedMatches)); |
| Assert.assertEquals("Bad files matching " + pattern + " in " + dir, |
| Joiner.on(",").join(found), |
| Joiner.on(",").join(expectedSet)); |
| } |
| |
| public static void assertExceptionContains(String string, Throwable t) { |
| String msg = t.getMessage(); |
| Assert.assertTrue( |
| "Unexpected exception:" + StringUtils.stringifyException(t), |
| msg.contains(string)); |
| } |
| |
| public static void waitFor(Supplier<Boolean> check, |
| int checkEveryMillis, int waitForMillis) |
| throws TimeoutException, InterruptedException |
| { |
| long st = System.currentTimeMillis(); |
| do { |
| boolean result = check.get(); |
| if (result) { |
| return; |
| } |
| |
| Thread.sleep(checkEveryMillis); |
| } while (System.currentTimeMillis() - st < waitForMillis); |
| throw new TimeoutException("Timed out waiting for condition"); |
| } |
| |
| |
| /** |
| * Mockito answer helper that triggers one latch as soon as the |
| * method is called, then waits on another before continuing. |
| */ |
| public static class DelayAnswer implements Answer<Object> { |
| private final Log LOG; |
| |
| private final CountDownLatch fireLatch = new CountDownLatch(1); |
| private final CountDownLatch waitLatch = new CountDownLatch(1); |
| |
| |
| public DelayAnswer(Log log) { |
| this.LOG = log; |
| } |
| |
| /** |
| * Wait until the method is called. |
| */ |
| public void waitForCall() throws InterruptedException { |
| fireLatch.await(); |
| } |
| |
| /** |
| * Tell the method to proceed. |
| * This should only be called after waitForCall() |
| */ |
| public void proceed() { |
| waitLatch.countDown(); |
| } |
| |
| public Object answer(InvocationOnMock invocation) throws Throwable { |
| LOG.info("DelayAnswer firing fireLatch"); |
| fireLatch.countDown(); |
| try { |
| LOG.info("DelayAnswer waiting on waitLatch"); |
| waitLatch.await(); |
| LOG.info("DelayAnswer delay complete"); |
| } catch (InterruptedException ie) { |
| throw new IOException("Interrupted waiting on latch", ie); |
| } |
| return passThrough(invocation); |
| } |
| |
| protected Object passThrough(InvocationOnMock invocation) throws Throwable { |
| return invocation.callRealMethod(); |
| } |
| } |
| |
| /** |
| * An Answer implementation that simply forwards all calls through |
| * to a delegate. |
| * |
| * This is useful as the default Answer for a mock object, to create |
| * something like a spy on an RPC proxy. For example: |
| * <code> |
| * NamenodeProtocol origNNProxy = secondary.getNameNode(); |
| * NamenodeProtocol spyNNProxy = Mockito.mock(NameNodeProtocol.class, |
| * new DelegateAnswer(origNNProxy); |
| * doThrow(...).when(spyNNProxy).getBlockLocations(...); |
| * ... |
| * </code> |
| */ |
| public static class DelegateAnswer implements Answer<Object> { |
| private final Object delegate; |
| |
| public DelegateAnswer(Object delegate) { |
| this.delegate = delegate; |
| } |
| |
| @Override |
| public Object answer(InvocationOnMock invocation) throws Throwable { |
| return invocation.getMethod().invoke( |
| delegate, invocation.getArguments()); |
| } |
| } |
| |
| } |