}
                return totalMemoryFourth > oneGB ? oneGB : totalMemoryFourth;
        }
    }

    @VisibleForTesting
    boolean isIbmJvm() {
        return Jvm.current().isIbmJvm();
    }

    @VisibleForTesting
    int getJvmBitMode() {
        for (String property : Arrays.asList("sun.arch.data.model", "com.ibm.vm.bitmode", "os.arch")) {

    private static final long TEST_FREE_MEMORY = 512L * 1024 * 1024
    private static final String MBEAN_OS = "java.lang:type=OperatingSystem"
    private static final String TOTAL_MEMORY_ATTRIBUTE = Jvm.current().isIbmJvm() ? "TotalPhysicalMemory" : "TotalPhysicalMemorySize"
    private static final TestMBeanAttributeProvider.AttributeKey TOTAL_MEMORY_KEY = new TestMBeanAttributeProvider.AttributeKey(MBEAN_OS, TOTAL_MEMORY_ATTRIBUTE, Long.class)

        this.mBeanAttributeProvider = mBeanAttributeProvider;
    }

    @Override
    public OsMemoryStatus getOsSnapshot() {
        String totalMemoryAttribute = Jvm.current().isIbmJvm() ? "TotalPhysicalMemory" : "TotalPhysicalMemorySize";
        long total = mBeanAttributeProvider.getMbeanAttribute("java.lang:type=OperatingSystem", totalMemoryAttribute, Long.class);

    }

    private static MaximumHeapHelper testMaximumHeapHelper(ibm, bitMode = 64, server = true) {
        new MaximumHeapHelper() {
            @Override
            boolean isIbmJvm() { return ibm }

            @Override
            int getJvmBitMode() { return bitMode }

            @Override
            boolean isServerJvm() { return server }
        }
    }

        reserveIdleClient(twoGbOptions) == client2
    }

    def "expires idle worker daemons workers that have not provided usage and max heap is not specified"() {
        long requestedMemory = Jvm.current().isIbmJvm() ? MemoryAmount.parseNotation("512m") : MemoryAmount.ofGigaBytes(1).bytes

        given:
        reportsMemoryUsage = false
        def client1 = reserveNewClient(defaultOptions)

    }

    @Override
    boolean worksWith(Jvm jvm) {
        // Milestone 4 was broken on the IBM jvm
        if (jvm.isIbmJvm() && isVersion("1.0-milestone-4")) {
            return false;
        }

        JavaVersion javaVersion = jvm.getJavaVersion();
        if (javaVersion == null) {
            throw new IllegalArgumentException();

                continue;
            }
            vars.put(entry.getKey(), entry.getValue());
        }
        return vars;
    }

    public boolean isIbmJvm() {
        for (String vendorProperty : VENDOR_PROPERTIES) {
            if (System.getProperties().containsKey(vendorProperty)

    }

    def "uses system property to determine if IBM JVM"() {
        when:
        System.properties[vendorProperty] = 'IBM Corporation'
        def jvm = Jvm.current()

        then:
        jvm.isIbmJvm()

        where:
        vendorProperty << ['java.vendor', 'java.vm.vendor']
    }

    def "finds executable for java home supplied"() {
        System.properties['java.vm.vendor'] = 'Sun'

        String httpsProtocols = System.getProperty(HTTPS_PROTOCOLS);
        if (httpsProtocols != null) {
            return httpsProtocols.split(",");
        } else if (JavaVersion.current().isJava8() && Jvm.current().isIbmJvm()) {
            return new String[]{"TLSv1.2"};
        } else if (jdkSupportsTLSProtocol("TLSv1.3")) {
            return new String[]{"TLSv1.2", "TLSv1.3"};
        } else {