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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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:-UseShenandoahGC",
                                                                  "-XX:-UseZGC",
                                                                  "-version");
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldMatch("Garbage collector not selected");
        output.shouldHaveExitValue(1);
    }
}