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/*

 * @test

 * @requires vm.cds

 * @library /test/lib

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

 *      jdk.jartool/sun.tools.jar

 * @compile test-classes/TestClassLoader.java

 * @compile test-classes/ReportMyLoader.java

 * @compile test-classes/TrySwitchMyLoader.java

 * @run main SpecifySysLoaderProp

 */

import java.io.*;

import jdk.test.lib.process.OutputAnalyzer;

public class SpecifySysLoaderProp {

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

    JarBuilder.build("sysloader", "TestClassLoader", "ReportMyLoader", "TrySwitchMyLoader");

    String jarFileName = "sysloader.jar";

    String appJar = TestCommon.getTestJar(jarFileName);

    TestCommon.testDump(appJar, TestCommon.list("ReportMyLoader"));

    // (0) Baseline. Do not specify -Djava.system.class.loader

    //     The test class should be loaded from archive

    TestCommon.run(

        "-verbose:class",

        "-cp", appJar,

        "ReportMyLoader")

      .assertNormalExit("[class,load] ReportMyLoader source: shared objects file",

                        "ReportMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@");

    // (1) Try to execute the archive with -Djava.system.class.loader=no.such.Klass,

    //     it should fail

    TestCommon.run(

        "-cp", appJar,

        "-Djava.system.class.loader=no.such.Klass",

        "ReportMyLoader")

      .assertAbnormalExit(output -> {

          output.shouldContain(warning);

          output.shouldContain("ClassNotFoundException: no.such.Klass");

        });

    // (2) Try to execute the archive with -Djava.system.class.loader=TestClassLoader,

    TestCommon.run(

        "-verbose:class",

        "-cp", appJar,

        "-Djava.system.class.loader=TestClassLoader",

        "ReportMyLoader")

      .assertNormalExit("ReportMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@", //<-this is still printed because TestClassLoader simply delegates to Launcher$AppLoader, but ...

             "TestClassLoader.called = true", //<-but this proves that TestClassLoader was indeed called.

             "TestClassLoader: loadClass(\"ReportMyLoader\",") //<- this also proves that TestClassLoader was indeed called.

      .assertNormalExit(output -> {

        output.shouldMatch(".class,load. TestClassLoader source: file:");

        output.shouldMatch(".class,load. ReportMyLoader source: file:.*" + jarFileName);

        });

    // (3) Try to change the java.system.class.loader programmatically after

    //     the app's main method is executed. This should have no effect in terms of

    //     changing or switching the actual system class loader that's already in use.

    TestCommon.run(

        "-verbose:class",

        "-cp", appJar,

        "TrySwitchMyLoader")

      .assertNormalExit("[class,load] ReportMyLoader source: shared objects file",

             "TrySwitchMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@",

             "ReportMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@",

             "TestClassLoader.called = false");

  }

}