1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/testlibrary_tests/whitebox/vm_flags/VmFlagTest.java Fri May 30 17:20:48 2014 +0400
1.3 @@ -0,0 +1,115 @@
1.4 +/*
1.5 + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +import java.util.Objects;
1.28 +import java.util.function.BiConsumer;
1.29 +import java.util.function.Function;
1.30 +import sun.hotspot.WhiteBox;
1.31 +import sun.management.*;
1.32 +import com.sun.management.*;
1.33 +import com.oracle.java.testlibrary.*;
1.34 +
1.35 +public final class VmFlagTest<T> {
1.36 + public static final WhiteBox WHITE_BOX = WhiteBox.getWhiteBox();
1.37 +
1.38 + private static final String NONEXISTENT_FLAG = "NonexistentFlag";
1.39 + private final String flagName;
1.40 + private final BiConsumer<T, T> test;
1.41 + private final BiConsumer<String, T> set;
1.42 + private final Function<String, T> get;
1.43 +
1.44 + protected VmFlagTest(String flagName, BiConsumer<String, T> set,
1.45 + Function<String, T> get, boolean isPositive) {
1.46 + this.flagName = flagName;
1.47 + this.set = set;
1.48 + this.get = get;
1.49 + if (isPositive) {
1.50 + test = this::testPositive;
1.51 + } else {
1.52 + test = this::testNegative;
1.53 + }
1.54 + }
1.55 +
1.56 + private void setNewValue(T value) {
1.57 + set.accept(flagName, value);
1.58 + }
1.59 +
1.60 + private T getValue() {
1.61 + T t = get.apply(flagName);
1.62 + System.out.println("T = " + t);
1.63 + return t;
1.64 + }
1.65 +
1.66 + protected static <T> void runTest(String existentFlag, T[] tests,
1.67 + BiConsumer<String, T> set, Function<String, T> get) {
1.68 + runTest(existentFlag, tests, tests, set, get);
1.69 + }
1.70 +
1.71 + protected static <T> void runTest(String existentFlag, T[] tests,
1.72 + T[] results, BiConsumer<String, T> set, Function<String, T> get) {
1.73 + if (existentFlag != null) {
1.74 + new VmFlagTest(existentFlag, set, get, true).test(tests, results);
1.75 + }
1.76 + new VmFlagTest(NONEXISTENT_FLAG, set, get, false).test(tests, results);
1.77 + }
1.78 +
1.79 + public final void test(T[] tests, T[] results) {
1.80 + Asserts.assertEQ(tests.length, results.length, "[TESTBUG] tests.length != results.length");
1.81 + for (int i = 0, n = tests.length ; i < n; ++i) {
1.82 + test.accept(tests[i], results[i]);
1.83 + }
1.84 + }
1.85 +
1.86 + protected String getVMOptionAsString() {
1.87 + HotSpotDiagnosticMXBean diagnostic
1.88 + = ManagementFactoryHelper.getDiagnosticMXBean();
1.89 + VMOption tmp;
1.90 + try {
1.91 + tmp = diagnostic.getVMOption(flagName);
1.92 + } catch (IllegalArgumentException e) {
1.93 + tmp = null;
1.94 + }
1.95 + return tmp == null ? null : tmp.getValue();
1.96 + }
1.97 +
1.98 + private void testPositive(T value, T expected) {
1.99 + Asserts.assertEQ(getVMOptionAsString(), asString(getValue()));
1.100 + setNewValue(value);
1.101 + String newValue = getVMOptionAsString();
1.102 + Asserts.assertEQ(newValue, asString(expected));
1.103 + Asserts.assertEQ(getVMOptionAsString(), asString(getValue()));
1.104 + }
1.105 +
1.106 + private void testNegative(T value, T expected) {
1.107 + String oldValue = getVMOptionAsString();
1.108 + Asserts.assertEQ(oldValue, asString(getValue()));
1.109 + setNewValue(value);
1.110 + String newValue = getVMOptionAsString();
1.111 + Asserts.assertEQ(oldValue, newValue);
1.112 + }
1.113 +
1.114 + private String asString(Object value) {
1.115 + return value == null ? null : "" + value;
1.116 + }
1.117 +}
1.118 +
