1 /* 2 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.io.IOException; 25 import java.nio.charset.Charset; 26 import java.nio.file.Files; 27 import java.nio.file.Paths; 28 29 /** 30 * This is a base class for any tests which are intended to test -XX:Print* 31 * options by parsing GC log output. It encapsulates reading GC's log 32 * output from the log file and provides that output to the tests. 33 * 34 * NOTE: It assumes that the log filename is determined from the test's class 35 * name by removing leading 'Test' and adding '.txt' suffix. For instance, 36 * the test class TestWhatever corresponds to the log filename Whatever.txt. 37 * 38 */ 39 public abstract class AbstractPrintGCTest { 40 41 private final String logFileName; 42 43 /** 44 * Constructs a test object. Binds the test's name with the GC's log 45 * filename. 46 */ 47 public AbstractPrintGCTest() { 48 String className = getClass().getName(); 49 if (!className.startsWith("Test")) { 50 throw new IllegalStateException( 51 "The test's class name shall starts with 'Test'"); 52 } 53 logFileName = getClass().getName().substring("Test".length()) 54 + ".txt"; 55 } 56 57 /** 58 * Retrieves content of GC's log file. 59 */ 60 public final String getContent() { 61 try { 62 return new String(Files.readAllBytes(Paths.get(logFileName)), 63 Charset.defaultCharset()); 64 } catch (IOException e) { 65 throw new RuntimeException( 66 "Failed to retrieve content from the log file: " 67 + logFileName, e); 68 } 69 } 70 71 /** 72 * The test code goes here. 73 */ 74 public abstract void runTest(); 75 }