test/hotspot/jtreg/runtime/logging/DefaultMethodsTest.java

/*
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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,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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/*
 * @test
 * @bug 8139564 8203960
 * @summary defaultmethods=debug should have logging from each of the statements in the code
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @run driver DefaultMethodsTest
 */

import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;

public class DefaultMethodsTest {
    public static void main(String[] args) throws Exception {
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:defaultmethods=debug",
                                                                  InnerClass.class.getName());
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldContain("Slots that need filling:");
        output.shouldContain("requires default method processing");
        output.shouldContain("Looking for default methods for slot ");
        output.shouldContain("Creating defaults and overpasses...");
        output.shouldContain("for slot: ");
        output.shouldContain("Default method processing complete");
        output.shouldContain("overpass methods");
        output.shouldContain("default methods");
        output.shouldHaveExitValue(0);
    }

    interface TestInterface {
        default void doSomething() {
            System.out.println("Default TestInterface");
        }
    }

    public static class InnerClass implements TestInterface {
        // InnerClass implements TestInterface with a default method.
        // Loading of InnerClass will trigger default method processing.
        public static void main(String[] args) throws Exception {
            System.out.println("Inner Class");
        }
    }
}