jdk/test/java/lang/instrument/PremainClass/ZeroArgPremainAgentTest.java

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import jdk.testlibrary.OutputAnalyzer;
import jdk.testlibrary.ProcessTools;
import jdk.testlibrary.Utils;

/*
 * @test
 * @bug 6289149
 * @summary test when the agent's class has a zero arg premain() function.
 * @library /lib/testlibrary
 * @modules java.management
 *          java.instrument
 * @run build jdk.testlibrary.* DummyMain
 * @run shell ../MakeJAR3.sh ZeroArgPremainAgent
 * @run main/othervm -XX:-CreateCoredumpOnCrash ZeroArgPremainAgentTest
 */
public class ZeroArgPremainAgentTest {
    // Use a javaagent with a zero argument premain() function.
    // Verify that we get the correct exception.
    public static void main(String[] a) throws Exception {
        String testArgs = String.format(
                "-javaagent:ZeroArgPremainAgent.jar -classpath %s DummyMain",
                System.getProperty("test.classes", "."));

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
                Utils.addTestJavaOpts(testArgs.split("\\s+")));
        System.out.println("testjvm.cmd:" + Utils.getCommandLine(pb));

        OutputAnalyzer output = ProcessTools.executeProcess(pb);
        System.out.println("testjvm.stdout:" + output.getStdout());
        System.out.println("testjvm.stderr:" + output.getStderr());

        output.stderrShouldContain("java.lang.NoSuchMethodException");
        if (0 == output.getExitValue()) {
            throw new RuntimeException("Expected error but got exit value 0");
        }
    }
}