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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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import static jdk.test.lib.Asserts.assertEQ;

import static jdk.test.lib.Asserts.assertFalse;

import static jdk.test.lib.Asserts.assertTrue;

import jdk.test.lib.DynamicVMOption;

/**

 * @test TestDynMaxHeapFreeRatio

 * @bug 8028391

 * @summary Verify that MaxHeapFreeRatio flag is manageable

 * @library /test/lib

 * @modules java.base/jdk.internal.misc

 * @modules java.management

 * @run main TestDynMaxHeapFreeRatio

 * @run main/othervm -XX:MinHeapFreeRatio=0 -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio

 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 -XX:-UseAdaptiveSizePolicy TestDynMaxHeapFreeRatio

 * @run main/othervm -XX:MinHeapFreeRatio=10 -XX:MaxHeapFreeRatio=50 TestDynMaxHeapFreeRatio

 * @run main/othervm -XX:MinHeapFreeRatio=51 -XX:MaxHeapFreeRatio=52 TestDynMaxHeapFreeRatio

 * @run main/othervm -XX:MinHeapFreeRatio=75 -XX:MaxHeapFreeRatio=100 TestDynMaxHeapFreeRatio

 */

public class TestDynMaxHeapFreeRatio {

    public static void main(String args[]) throws Exception {

        // low boundary value

        int minValue = DynamicVMOption.getInt("MinHeapFreeRatio");

        System.out.println("MinHeapFreeRatio= " + minValue);

        String badValues[] = {

            null,

            "",

            "not a number",

            "8.5", "-0.01",

            Integer.toString(Integer.MIN_VALUE),

            Integer.toString(Integer.MAX_VALUE),

            Integer.toString(minValue - 1),

            "-1024", "-1", "101", "1997"

        };

        String goodValues[] = {

            Integer.toString(minValue),

            Integer.toString(minValue + 1),

            Integer.toString((minValue + 100) / 2),

            "99", "100"

        };

        DynamicVMOption option = new DynamicVMOption("MaxHeapFreeRatio");

        assertTrue(option.isWriteable(), "Option " + option.name

                + " is expected to be writable");

        for (String v : badValues) {

            assertFalse(option.isValidValue(v),

                    "'" + v + "' is expected to be illegal for flag " + option.name);

        }

        for (String v : goodValues) {

            option.setValue(v);

            String newValue = option.getValue();

            assertEQ(v, newValue);

        }

    }

}