hotspot/test/testlibrary_tests/TestMutuallyExclusivePlatformPredicates.java
author ctornqvi
Fri, 19 Aug 2016 10:06:30 -0400
changeset 40631 ed82623d7831
parent 40093 f94d179a730b
child 41086 06b10263e509
permissions -rw-r--r--
8157957: ClassNotFoundException: jdk.test.lib.JDKToolFinder Reviewed-by: coleenp, gtriantafill, mseledtsov, iignatyev, dholmes, dsamersoff
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/*
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 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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import jdk.test.lib.Asserts;
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import jdk.test.lib.Platform;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.EnumSet;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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/**
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 * @test
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 * @summary Verify that for each group of mutually exclusive predicates defined
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 *          in jdk.test.lib.Platform one and only one predicate
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 *          evaluates to true.
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 * @library /test/lib
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 * @modules java.base/jdk.internal.misc
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 *          java.management
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 * @run main TestMutuallyExclusivePlatformPredicates
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 */
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public class TestMutuallyExclusivePlatformPredicates {
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    private static enum MethodGroup {
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        ARCH("isARM", "isPPC", "isSparc", "isX86", "isX64", "isAArch64"),
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        BITNESS("is32bit", "is64bit"),
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        OS("isAix", "isLinux", "isOSX", "isSolaris", "isWindows"),
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        VM_TYPE("isClient", "isServer", "isGraal", "isMinimal", "isZero", "isEmbedded"),
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        MODE("isInt", "isMixed", "isComp"),
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        IGNORED("isDebugBuild", "shouldSAAttach",
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                "canPtraceAttachLinux", "canAttachOSX", "isTieredSupported");
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        public final List<String> methodNames;
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        private MethodGroup(String... methodNames) {
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            this.methodNames = Collections.unmodifiableList(
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                    Arrays.asList(methodNames));
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        }
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    }
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    public static void main(String args[]) {
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        EnumSet<MethodGroup> notIgnoredMethodGroups
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                = EnumSet.complementOf(EnumSet.of(MethodGroup.IGNORED));
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        notIgnoredMethodGroups.forEach(
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                TestMutuallyExclusivePlatformPredicates::verifyPredicates);
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        TestMutuallyExclusivePlatformPredicates.verifyCoverage();
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    }
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    /**
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     * Verifies that one and only one predicate method defined in
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     * {@link jdk.test.lib.Platform}, whose name included into
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     * methodGroup will return {@code true}.
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     * @param methodGroup The group of methods that should be tested.
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     */
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    private static void verifyPredicates(MethodGroup methodGroup) {
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        System.out.println("Verifying method group: " + methodGroup.name());
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        long truePredicatesCount = methodGroup.methodNames.stream()
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                .filter(TestMutuallyExclusivePlatformPredicates
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                        ::evaluatePredicate)
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                .count();
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        Asserts.assertEQ(truePredicatesCount, 1L, String.format(
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                "Only one predicate from group %s should be evaluated to true "
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                        + "(Actually %d predicates were evaluated to true).",
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                methodGroup.name(), truePredicatesCount));
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    }
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    /**
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     * Verifies that all predicates defined in
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     * {@link jdk.test.lib.Platform} were either tested or
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     * explicitly ignored.
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     */
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    private static void verifyCoverage() {
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        Set<String> allMethods = new HashSet<>();
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        for (MethodGroup group : MethodGroup.values()) {
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            allMethods.addAll(group.methodNames);
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        }
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        for (Method m : Platform.class.getMethods()) {
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            if (m.getParameterCount() == 0
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                    && m.getReturnType() == boolean.class) {
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                Asserts.assertTrue(allMethods.contains(m.getName()),
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                        "All Platform's methods with signature '():Z' should "
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                                + "be tested ");
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            }
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        }
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    }
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    /**
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     * Evaluates predicate method with name {@code name} defined in
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     * {@link jdk.test.lib.Platform}.
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     *
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     * @param name The name of a predicate to be evaluated.
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     * @return evaluated predicate's value.
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     * @throws java.lang.Error if predicate is not defined or could not be
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     *                         evaluated.
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     */
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    private static boolean evaluatePredicate(String name) {
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        try {
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            System.out.printf("Trying to evaluate predicate with name %s%n",
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                    name);
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            boolean value
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                    = (Boolean) Platform.class.getMethod(name).invoke(null);
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            System.out.printf("Predicate evaluated to: %s%n", value);
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            return value;
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        } catch (NoSuchMethodException e) {
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            throw new Error("Predicate with name " + name
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                    + " is not defined in " + Platform.class.getName(), e);
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        } catch (IllegalAccessException | InvocationTargetException e) {
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            throw new Error("Unable to evaluate predicate " + name, e);
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        }
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    }
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}