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/*

 * @test TestDisableDefaultGC

 * @summary Test that the VM complains when the default GC is disabled and no other GC is specified

 * @bug 8068579

 * @key gc

 * @library /test/lib

 * @requires vm.gc=="null"

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

 *          java.management

 * @run driver TestDisableDefaultGC

 */

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

public class TestDisableDefaultGC {

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

        // Start VM, disabling all possible default GCs

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:-UseSerialGC",

                                                                  "-XX:-UseParallelGC",

                                                                  "-XX:-UseG1GC",

                                                                  "-XX:-UseConcMarkSweepGC",

                                                                  "-XX:+UnlockExperimentalVMOptions",

                                                                  "-XX:-UseZGC",

                                                                  "-version");

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

        output.shouldMatch("Garbage collector not selected");

        output.shouldHaveExitValue(1);

    }

}