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<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.io.File;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.io.IOException;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.lang.management.ManagementFactory;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.lang.management.ThreadInfo;<a name="line.23"></a>
<span class="sourceLineNo">024</span>import java.lang.management.ThreadMXBean;<a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.lang.reflect.InvocationTargetException;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.util.Arrays;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.util.Random;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.Set;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.concurrent.CountDownLatch;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.concurrent.TimeoutException;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.concurrent.atomic.AtomicInteger;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import java.util.regex.Pattern;<a name="line.32"></a>
<span class="sourceLineNo">033</span><a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.fs.FileUtil;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.util.Time;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.log4j.Logger;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.junit.Assert;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.mockito.invocation.InvocationOnMock;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.mockito.stubbing.Answer;<a name="line.39"></a>
<span class="sourceLineNo">040</span><a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.apache.hbase.thirdparty.com.google.common.base.Joiner;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.apache.hbase.thirdparty.com.google.common.base.Supplier;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.apache.hbase.thirdparty.com.google.common.collect.Sets;<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>/**<a name="line.45"></a>
<span class="sourceLineNo">046</span> * Test provides some very generic helpers which might be used across the tests<a name="line.46"></a>
<span class="sourceLineNo">047</span> */<a name="line.47"></a>
<span class="sourceLineNo">048</span>public abstract class GenericTestUtils {<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span> private static final AtomicInteger sequence = new AtomicInteger();<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> /**<a name="line.52"></a>
<span class="sourceLineNo">053</span> * Extracts the name of the method where the invocation has happened<a name="line.53"></a>
<span class="sourceLineNo">054</span> * @return String name of the invoking method<a name="line.54"></a>
<span class="sourceLineNo">055</span> */<a name="line.55"></a>
<span class="sourceLineNo">056</span> public static String getMethodName() {<a name="line.56"></a>
<span class="sourceLineNo">057</span> return Thread.currentThread().getStackTrace()[2].getMethodName();<a name="line.57"></a>
<span class="sourceLineNo">058</span> }<a name="line.58"></a>
<span class="sourceLineNo">059</span><a name="line.59"></a>
<span class="sourceLineNo">060</span> /**<a name="line.60"></a>
<span class="sourceLineNo">061</span> * Generates a process-wide unique sequence number.<a name="line.61"></a>
<span class="sourceLineNo">062</span> * @return an unique sequence number<a name="line.62"></a>
<span class="sourceLineNo">063</span> */<a name="line.63"></a>
<span class="sourceLineNo">064</span> public static int uniqueSequenceId() {<a name="line.64"></a>
<span class="sourceLineNo">065</span> return sequence.incrementAndGet();<a name="line.65"></a>
<span class="sourceLineNo">066</span> }<a name="line.66"></a>
<span class="sourceLineNo">067</span><a name="line.67"></a>
<span class="sourceLineNo">068</span> /**<a name="line.68"></a>
<span class="sourceLineNo">069</span> * Assert that a given file exists.<a name="line.69"></a>
<span class="sourceLineNo">070</span> */<a name="line.70"></a>
<span class="sourceLineNo">071</span> public static void assertExists(File f) {<a name="line.71"></a>
<span class="sourceLineNo">072</span> Assert.assertTrue("File " + f + " should exist", f.exists());<a name="line.72"></a>
<span class="sourceLineNo">073</span> }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span> /**<a name="line.75"></a>
<span class="sourceLineNo">076</span> * List all of the files in 'dir' that match the regex 'pattern'.<a name="line.76"></a>
<span class="sourceLineNo">077</span> * Then check that this list is identical to 'expectedMatches'.<a name="line.77"></a>
<span class="sourceLineNo">078</span> * @throws IOException if the dir is inaccessible<a name="line.78"></a>
<span class="sourceLineNo">079</span> */<a name="line.79"></a>
<span class="sourceLineNo">080</span> public static void assertGlobEquals(File dir, String pattern,<a name="line.80"></a>
<span class="sourceLineNo">081</span> String ... expectedMatches) throws IOException {<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> Set&lt;String&gt; found = Sets.newTreeSet();<a name="line.83"></a>
<span class="sourceLineNo">084</span> for (File f : FileUtil.listFiles(dir)) {<a name="line.84"></a>
<span class="sourceLineNo">085</span> if (f.getName().matches(pattern)) {<a name="line.85"></a>
<span class="sourceLineNo">086</span> found.add(f.getName());<a name="line.86"></a>
<span class="sourceLineNo">087</span> }<a name="line.87"></a>
<span class="sourceLineNo">088</span> }<a name="line.88"></a>
<span class="sourceLineNo">089</span> Set&lt;String&gt; expectedSet = Sets.newTreeSet(<a name="line.89"></a>
<span class="sourceLineNo">090</span> Arrays.asList(expectedMatches));<a name="line.90"></a>
<span class="sourceLineNo">091</span> Assert.assertEquals("Bad files matching " + pattern + " in " + dir,<a name="line.91"></a>
<span class="sourceLineNo">092</span> Joiner.on(",").join(expectedSet),<a name="line.92"></a>
<span class="sourceLineNo">093</span> Joiner.on(",").join(found));<a name="line.93"></a>
<span class="sourceLineNo">094</span> }<a name="line.94"></a>
<span class="sourceLineNo">095</span><a name="line.95"></a>
<span class="sourceLineNo">096</span> public static void waitFor(Supplier&lt;Boolean&gt; check,<a name="line.96"></a>
<span class="sourceLineNo">097</span> int checkEveryMillis, int waitForMillis)<a name="line.97"></a>
<span class="sourceLineNo">098</span> throws TimeoutException, InterruptedException<a name="line.98"></a>
<span class="sourceLineNo">099</span> {<a name="line.99"></a>
<span class="sourceLineNo">100</span> long st = Time.now();<a name="line.100"></a>
<span class="sourceLineNo">101</span> do {<a name="line.101"></a>
<span class="sourceLineNo">102</span> boolean result = check.get();<a name="line.102"></a>
<span class="sourceLineNo">103</span> if (result) {<a name="line.103"></a>
<span class="sourceLineNo">104</span> return;<a name="line.104"></a>
<span class="sourceLineNo">105</span> }<a name="line.105"></a>
<span class="sourceLineNo">106</span><a name="line.106"></a>
<span class="sourceLineNo">107</span> Thread.sleep(checkEveryMillis);<a name="line.107"></a>
<span class="sourceLineNo">108</span> } while (Time.now() - st &lt; waitForMillis);<a name="line.108"></a>
<span class="sourceLineNo">109</span><a name="line.109"></a>
<span class="sourceLineNo">110</span> throw new TimeoutException("Timed out waiting for condition. " +<a name="line.110"></a>
<span class="sourceLineNo">111</span> "Thread diagnostics:\n" +<a name="line.111"></a>
<span class="sourceLineNo">112</span> TimedOutTestsListener.buildThreadDiagnosticString());<a name="line.112"></a>
<span class="sourceLineNo">113</span> }<a name="line.113"></a>
<span class="sourceLineNo">114</span><a name="line.114"></a>
<span class="sourceLineNo">115</span> /**<a name="line.115"></a>
<span class="sourceLineNo">116</span> * Mockito answer helper that triggers one latch as soon as the<a name="line.116"></a>
<span class="sourceLineNo">117</span> * method is called, then waits on another before continuing.<a name="line.117"></a>
<span class="sourceLineNo">118</span> */<a name="line.118"></a>
<span class="sourceLineNo">119</span> public static class DelayAnswer implements Answer&lt;Object&gt; {<a name="line.119"></a>
<span class="sourceLineNo">120</span> private final Logger LOG;<a name="line.120"></a>
<span class="sourceLineNo">121</span><a name="line.121"></a>
<span class="sourceLineNo">122</span> private final CountDownLatch fireLatch = new CountDownLatch(1);<a name="line.122"></a>
<span class="sourceLineNo">123</span> private final CountDownLatch waitLatch = new CountDownLatch(1);<a name="line.123"></a>
<span class="sourceLineNo">124</span> private final CountDownLatch resultLatch = new CountDownLatch(1);<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span> private final AtomicInteger fireCounter = new AtomicInteger(0);<a name="line.126"></a>
<span class="sourceLineNo">127</span> private final AtomicInteger resultCounter = new AtomicInteger(0);<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span> // Result fields set after proceed() is called.<a name="line.129"></a>
<span class="sourceLineNo">130</span> private volatile Throwable thrown;<a name="line.130"></a>
<span class="sourceLineNo">131</span> private volatile Object returnValue;<a name="line.131"></a>
<span class="sourceLineNo">132</span><a name="line.132"></a>
<span class="sourceLineNo">133</span> public DelayAnswer(Logger log) {<a name="line.133"></a>
<span class="sourceLineNo">134</span> this.LOG = log;<a name="line.134"></a>
<span class="sourceLineNo">135</span> }<a name="line.135"></a>
<span class="sourceLineNo">136</span><a name="line.136"></a>
<span class="sourceLineNo">137</span> /**<a name="line.137"></a>
<span class="sourceLineNo">138</span> * Wait until the method is called.<a name="line.138"></a>
<span class="sourceLineNo">139</span> */<a name="line.139"></a>
<span class="sourceLineNo">140</span> public void waitForCall() throws InterruptedException {<a name="line.140"></a>
<span class="sourceLineNo">141</span> fireLatch.await();<a name="line.141"></a>
<span class="sourceLineNo">142</span> }<a name="line.142"></a>
<span class="sourceLineNo">143</span><a name="line.143"></a>
<span class="sourceLineNo">144</span> /**<a name="line.144"></a>
<span class="sourceLineNo">145</span> * Tell the method to proceed.<a name="line.145"></a>
<span class="sourceLineNo">146</span> * This should only be called after waitForCall()<a name="line.146"></a>
<span class="sourceLineNo">147</span> */<a name="line.147"></a>
<span class="sourceLineNo">148</span> public void proceed() {<a name="line.148"></a>
<span class="sourceLineNo">149</span> waitLatch.countDown();<a name="line.149"></a>
<span class="sourceLineNo">150</span> }<a name="line.150"></a>
<span class="sourceLineNo">151</span><a name="line.151"></a>
<span class="sourceLineNo">152</span> @Override<a name="line.152"></a>
<span class="sourceLineNo">153</span> public Object answer(InvocationOnMock invocation) throws Throwable {<a name="line.153"></a>
<span class="sourceLineNo">154</span> LOG.info("DelayAnswer firing fireLatch");<a name="line.154"></a>
<span class="sourceLineNo">155</span> fireCounter.getAndIncrement();<a name="line.155"></a>
<span class="sourceLineNo">156</span> fireLatch.countDown();<a name="line.156"></a>
<span class="sourceLineNo">157</span> try {<a name="line.157"></a>
<span class="sourceLineNo">158</span> LOG.info("DelayAnswer waiting on waitLatch");<a name="line.158"></a>
<span class="sourceLineNo">159</span> waitLatch.await();<a name="line.159"></a>
<span class="sourceLineNo">160</span> LOG.info("DelayAnswer delay complete");<a name="line.160"></a>
<span class="sourceLineNo">161</span> } catch (InterruptedException ie) {<a name="line.161"></a>
<span class="sourceLineNo">162</span> throw new IOException("Interrupted waiting on latch", ie);<a name="line.162"></a>
<span class="sourceLineNo">163</span> }<a name="line.163"></a>
<span class="sourceLineNo">164</span> return passThrough(invocation);<a name="line.164"></a>
<span class="sourceLineNo">165</span> }<a name="line.165"></a>
<span class="sourceLineNo">166</span><a name="line.166"></a>
<span class="sourceLineNo">167</span> protected Object passThrough(InvocationOnMock invocation) throws Throwable {<a name="line.167"></a>
<span class="sourceLineNo">168</span> try {<a name="line.168"></a>
<span class="sourceLineNo">169</span> Object ret = invocation.callRealMethod();<a name="line.169"></a>
<span class="sourceLineNo">170</span> returnValue = ret;<a name="line.170"></a>
<span class="sourceLineNo">171</span> return ret;<a name="line.171"></a>
<span class="sourceLineNo">172</span> } catch (Throwable t) {<a name="line.172"></a>
<span class="sourceLineNo">173</span> thrown = t;<a name="line.173"></a>
<span class="sourceLineNo">174</span> throw t;<a name="line.174"></a>
<span class="sourceLineNo">175</span> } finally {<a name="line.175"></a>
<span class="sourceLineNo">176</span> resultCounter.incrementAndGet();<a name="line.176"></a>
<span class="sourceLineNo">177</span> resultLatch.countDown();<a name="line.177"></a>
<span class="sourceLineNo">178</span> }<a name="line.178"></a>
<span class="sourceLineNo">179</span> }<a name="line.179"></a>
<span class="sourceLineNo">180</span><a name="line.180"></a>
<span class="sourceLineNo">181</span> /**<a name="line.181"></a>
<span class="sourceLineNo">182</span> * After calling proceed(), this will wait until the call has<a name="line.182"></a>
<span class="sourceLineNo">183</span> * completed and a result has been returned to the caller.<a name="line.183"></a>
<span class="sourceLineNo">184</span> */<a name="line.184"></a>
<span class="sourceLineNo">185</span> public void waitForResult() throws InterruptedException {<a name="line.185"></a>
<span class="sourceLineNo">186</span> resultLatch.await();<a name="line.186"></a>
<span class="sourceLineNo">187</span> }<a name="line.187"></a>
<span class="sourceLineNo">188</span><a name="line.188"></a>
<span class="sourceLineNo">189</span> /**<a name="line.189"></a>
<span class="sourceLineNo">190</span> * After the call has gone through, return any exception that<a name="line.190"></a>
<span class="sourceLineNo">191</span> * was thrown, or null if no exception was thrown.<a name="line.191"></a>
<span class="sourceLineNo">192</span> */<a name="line.192"></a>
<span class="sourceLineNo">193</span> public Throwable getThrown() {<a name="line.193"></a>
<span class="sourceLineNo">194</span> return thrown;<a name="line.194"></a>
<span class="sourceLineNo">195</span> }<a name="line.195"></a>
<span class="sourceLineNo">196</span><a name="line.196"></a>
<span class="sourceLineNo">197</span> /**<a name="line.197"></a>
<span class="sourceLineNo">198</span> * After the call has gone through, return the call's return value,<a name="line.198"></a>
<span class="sourceLineNo">199</span> * or null in case it was void or an exception was thrown.<a name="line.199"></a>
<span class="sourceLineNo">200</span> */<a name="line.200"></a>
<span class="sourceLineNo">201</span> public Object getReturnValue() {<a name="line.201"></a>
<span class="sourceLineNo">202</span> return returnValue;<a name="line.202"></a>
<span class="sourceLineNo">203</span> }<a name="line.203"></a>
<span class="sourceLineNo">204</span><a name="line.204"></a>
<span class="sourceLineNo">205</span> public int getFireCount() {<a name="line.205"></a>
<span class="sourceLineNo">206</span> return fireCounter.get();<a name="line.206"></a>
<span class="sourceLineNo">207</span> }<a name="line.207"></a>
<span class="sourceLineNo">208</span><a name="line.208"></a>
<span class="sourceLineNo">209</span> public int getResultCount() {<a name="line.209"></a>
<span class="sourceLineNo">210</span> return resultCounter.get();<a name="line.210"></a>
<span class="sourceLineNo">211</span> }<a name="line.211"></a>
<span class="sourceLineNo">212</span> }<a name="line.212"></a>
<span class="sourceLineNo">213</span><a name="line.213"></a>
<span class="sourceLineNo">214</span> /**<a name="line.214"></a>
<span class="sourceLineNo">215</span> * An Answer implementation that simply forwards all calls through<a name="line.215"></a>
<span class="sourceLineNo">216</span> * to a delegate.<a name="line.216"></a>
<span class="sourceLineNo">217</span> *<a name="line.217"></a>
<span class="sourceLineNo">218</span> * This is useful as the default Answer for a mock object, to create<a name="line.218"></a>
<span class="sourceLineNo">219</span> * something like a spy on an RPC proxy. For example:<a name="line.219"></a>
<span class="sourceLineNo">220</span> * &lt;code&gt;<a name="line.220"></a>
<span class="sourceLineNo">221</span> * NamenodeProtocol origNNProxy = secondary.getNameNode();<a name="line.221"></a>
<span class="sourceLineNo">222</span> * NamenodeProtocol spyNNProxy = Mockito.mock(NameNodeProtocol.class,<a name="line.222"></a>
<span class="sourceLineNo">223</span> * new DelegateAnswer(origNNProxy);<a name="line.223"></a>
<span class="sourceLineNo">224</span> * doThrow(...).when(spyNNProxy).getBlockLocations(...);<a name="line.224"></a>
<span class="sourceLineNo">225</span> * ...<a name="line.225"></a>
<span class="sourceLineNo">226</span> * &lt;/code&gt;<a name="line.226"></a>
<span class="sourceLineNo">227</span> */<a name="line.227"></a>
<span class="sourceLineNo">228</span> public static class DelegateAnswer implements Answer&lt;Object&gt; {<a name="line.228"></a>
<span class="sourceLineNo">229</span> private final Object delegate;<a name="line.229"></a>
<span class="sourceLineNo">230</span> private final Logger log;<a name="line.230"></a>
<span class="sourceLineNo">231</span><a name="line.231"></a>
<span class="sourceLineNo">232</span> public DelegateAnswer(Object delegate) {<a name="line.232"></a>
<span class="sourceLineNo">233</span> this(null, delegate);<a name="line.233"></a>
<span class="sourceLineNo">234</span> }<a name="line.234"></a>
<span class="sourceLineNo">235</span><a name="line.235"></a>
<span class="sourceLineNo">236</span> public DelegateAnswer(Logger log, Object delegate) {<a name="line.236"></a>
<span class="sourceLineNo">237</span> this.log = log;<a name="line.237"></a>
<span class="sourceLineNo">238</span> this.delegate = delegate;<a name="line.238"></a>
<span class="sourceLineNo">239</span> }<a name="line.239"></a>
<span class="sourceLineNo">240</span><a name="line.240"></a>
<span class="sourceLineNo">241</span> @Override<a name="line.241"></a>
<span class="sourceLineNo">242</span> public Object answer(InvocationOnMock invocation) throws Throwable {<a name="line.242"></a>
<span class="sourceLineNo">243</span> try {<a name="line.243"></a>
<span class="sourceLineNo">244</span> if (log != null) {<a name="line.244"></a>
<span class="sourceLineNo">245</span> log.info("Call to " + invocation + " on " + delegate,<a name="line.245"></a>
<span class="sourceLineNo">246</span> new Exception("TRACE"));<a name="line.246"></a>
<span class="sourceLineNo">247</span> }<a name="line.247"></a>
<span class="sourceLineNo">248</span> return invocation.getMethod().invoke(<a name="line.248"></a>
<span class="sourceLineNo">249</span> delegate, invocation.getArguments());<a name="line.249"></a>
<span class="sourceLineNo">250</span> } catch (InvocationTargetException ite) {<a name="line.250"></a>
<span class="sourceLineNo">251</span> throw ite.getCause();<a name="line.251"></a>
<span class="sourceLineNo">252</span> }<a name="line.252"></a>
<span class="sourceLineNo">253</span> }<a name="line.253"></a>
<span class="sourceLineNo">254</span> }<a name="line.254"></a>
<span class="sourceLineNo">255</span><a name="line.255"></a>
<span class="sourceLineNo">256</span> /**<a name="line.256"></a>
<span class="sourceLineNo">257</span> * An Answer implementation which sleeps for a random number of milliseconds<a name="line.257"></a>
<span class="sourceLineNo">258</span> * between 0 and a configurable value before delegating to the real<a name="line.258"></a>
<span class="sourceLineNo">259</span> * implementation of the method. This can be useful for drawing out race<a name="line.259"></a>
<span class="sourceLineNo">260</span> * conditions.<a name="line.260"></a>
<span class="sourceLineNo">261</span> */<a name="line.261"></a>
<span class="sourceLineNo">262</span> public static class SleepAnswer implements Answer&lt;Object&gt; {<a name="line.262"></a>
<span class="sourceLineNo">263</span> private final int maxSleepTime;<a name="line.263"></a>
<span class="sourceLineNo">264</span> private static Random r = new Random();<a name="line.264"></a>
<span class="sourceLineNo">265</span><a name="line.265"></a>
<span class="sourceLineNo">266</span> public SleepAnswer(int maxSleepTime) {<a name="line.266"></a>
<span class="sourceLineNo">267</span> this.maxSleepTime = maxSleepTime;<a name="line.267"></a>
<span class="sourceLineNo">268</span> }<a name="line.268"></a>
<span class="sourceLineNo">269</span><a name="line.269"></a>
<span class="sourceLineNo">270</span> @Override<a name="line.270"></a>
<span class="sourceLineNo">271</span> public Object answer(InvocationOnMock invocation) throws Throwable {<a name="line.271"></a>
<span class="sourceLineNo">272</span> boolean interrupted = false;<a name="line.272"></a>
<span class="sourceLineNo">273</span> try {<a name="line.273"></a>
<span class="sourceLineNo">274</span> Thread.sleep(r.nextInt(maxSleepTime));<a name="line.274"></a>
<span class="sourceLineNo">275</span> } catch (InterruptedException ie) {<a name="line.275"></a>
<span class="sourceLineNo">276</span> interrupted = true;<a name="line.276"></a>
<span class="sourceLineNo">277</span> }<a name="line.277"></a>
<span class="sourceLineNo">278</span> try {<a name="line.278"></a>
<span class="sourceLineNo">279</span> return invocation.callRealMethod();<a name="line.279"></a>
<span class="sourceLineNo">280</span> } finally {<a name="line.280"></a>
<span class="sourceLineNo">281</span> if (interrupted) {<a name="line.281"></a>
<span class="sourceLineNo">282</span> Thread.currentThread().interrupt();<a name="line.282"></a>
<span class="sourceLineNo">283</span> }<a name="line.283"></a>
<span class="sourceLineNo">284</span> }<a name="line.284"></a>
<span class="sourceLineNo">285</span> }<a name="line.285"></a>
<span class="sourceLineNo">286</span> }<a name="line.286"></a>
<span class="sourceLineNo">287</span><a name="line.287"></a>
<span class="sourceLineNo">288</span> public static void assertMatches(String output, String pattern) {<a name="line.288"></a>
<span class="sourceLineNo">289</span> Assert.assertTrue("Expected output to match /" + pattern + "/" +<a name="line.289"></a>
<span class="sourceLineNo">290</span> " but got:\n" + output,<a name="line.290"></a>
<span class="sourceLineNo">291</span> Pattern.compile(pattern).matcher(output).find());<a name="line.291"></a>
<span class="sourceLineNo">292</span> }<a name="line.292"></a>
<span class="sourceLineNo">293</span><a name="line.293"></a>
<span class="sourceLineNo">294</span> public static void assertValueNear(long expected, long actual, long allowedError) {<a name="line.294"></a>
<span class="sourceLineNo">295</span> assertValueWithinRange(expected - allowedError, expected + allowedError, actual);<a name="line.295"></a>
<span class="sourceLineNo">296</span> }<a name="line.296"></a>
<span class="sourceLineNo">297</span><a name="line.297"></a>
<span class="sourceLineNo">298</span> public static void assertValueWithinRange(long expectedMin, long expectedMax,<a name="line.298"></a>
<span class="sourceLineNo">299</span> long actual) {<a name="line.299"></a>
<span class="sourceLineNo">300</span> Assert.assertTrue("Expected " + actual + " to be in range (" + expectedMin + ","<a name="line.300"></a>
<span class="sourceLineNo">301</span> + expectedMax + ")", expectedMin &lt;= actual &amp;&amp; actual &lt;= expectedMax);<a name="line.301"></a>
<span class="sourceLineNo">302</span> }<a name="line.302"></a>
<span class="sourceLineNo">303</span><a name="line.303"></a>
<span class="sourceLineNo">304</span> /**<a name="line.304"></a>
<span class="sourceLineNo">305</span> * Assert that there are no threads running whose name matches the<a name="line.305"></a>
<span class="sourceLineNo">306</span> * given regular expression.<a name="line.306"></a>
<span class="sourceLineNo">307</span> * @param regex the regex to match against<a name="line.307"></a>
<span class="sourceLineNo">308</span> */<a name="line.308"></a>
<span class="sourceLineNo">309</span> public static void assertNoThreadsMatching(String regex) {<a name="line.309"></a>
<span class="sourceLineNo">310</span> Pattern pattern = Pattern.compile(regex);<a name="line.310"></a>
<span class="sourceLineNo">311</span> ThreadMXBean threadBean = ManagementFactory.getThreadMXBean();<a name="line.311"></a>
<span class="sourceLineNo">312</span><a name="line.312"></a>
<span class="sourceLineNo">313</span> ThreadInfo[] infos = threadBean.getThreadInfo(threadBean.getAllThreadIds(), 20);<a name="line.313"></a>
<span class="sourceLineNo">314</span> for (ThreadInfo info : infos) {<a name="line.314"></a>
<span class="sourceLineNo">315</span> if (info == null) continue;<a name="line.315"></a>
<span class="sourceLineNo">316</span> if (pattern.matcher(info.getThreadName()).matches()) {<a name="line.316"></a>
<span class="sourceLineNo">317</span> Assert.fail("Leaked thread: " + info + "\n" +<a name="line.317"></a>
<span class="sourceLineNo">318</span> Joiner.on("\n").join(info.getStackTrace()));<a name="line.318"></a>
<span class="sourceLineNo">319</span> }<a name="line.319"></a>
<span class="sourceLineNo">320</span> }<a name="line.320"></a>
<span class="sourceLineNo">321</span> }<a name="line.321"></a>
<span class="sourceLineNo">322</span>}<a name="line.322"></a>
</pre>
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