GuardShrinkWarning.java

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/**
 * @test GuardShrinkWarning
 * @summary Remove warning about CMS generation shrinking.
 * @bug 8012111
 * @key gc
 * @key regression
 * @library /testlibrary
 * @modules java.base/sun.misc
 *          java.management
 * @run main/othervm GuardShrinkWarning
 * @author jon.masamitsu@oracle.com
 */

import com.oracle.java.testlibrary.*;

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

    ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
      "-showversion",
      "-XX:+UseConcMarkSweepGC",
      "-XX:+ExplicitGCInvokesConcurrent",
      "GuardShrinkWarning$SystemGCCaller"
      );

    OutputAnalyzer output = new OutputAnalyzer(pb.start());

    output.shouldNotContain("Shrinking of CMS not yet implemented");

    output.shouldNotContain("error");

    output.shouldHaveExitValue(0);
  }
  static class SystemGCCaller {
    public static void main(String [] args) {
      System.gc();
    }
  }
}