jdk-24/jdk/test/java/lang/reflect/Module/AddExportsTest.java

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/**
 * @test
 * @run main/othervm -XaddExports:java.desktop/sun.awt=java.base AddExportsTest
 * @run main/othervm -XaddExports:java.desktop/sun.awt=ALL-UNNAMED AddExportsTest
 * @summary Test Module isExported methods with exports changed by -AddExportsTest
 */

import java.lang.reflect.Layer;
import java.lang.reflect.Module;
import java.util.Optional;

public class AddExportsTest {

    public static void main(String[] args) {

        String addExports = System.getProperty("jdk.launcher.addexports.0");
        assertTrue(addExports != null, "Expected to be run with -XaddExports");

        Layer bootLayer = Layer.boot();

        Module unnamedModule = AddExportsTest.class.getModule();
        assertFalse(unnamedModule.isNamed());

        for (String expr : addExports.split(",")) {

            String[] s = expr.split("=");
            assertTrue(s.length == 2);

            // $MODULE/$PACKAGE
            String[] moduleAndPackage = s[0].split("/");
            assertTrue(moduleAndPackage.length == 2);

            String mn = moduleAndPackage[0];
            String pn = moduleAndPackage[1];

            // source module
            Module source;
            Optional<Module> om = bootLayer.findModule(mn);
            assertTrue(om.isPresent(), mn + " not in boot layer");
            source = om.get();

            // package should not be exported unconditionally
            assertFalse(source.isExported(pn),
                        pn + " should not be exported unconditionally");

            // $TARGET
            String tn = s[1];
            if ("ALL-UNNAMED".equals(tn)) {

                // package is exported to all unnamed modules
                assertTrue(source.isExported(pn, unnamedModule),
                           pn + " should be exported to all unnamed modules");

            } else {

                om = bootLayer.findModule(tn);
                assertTrue(om.isPresent());
                Module target = om.get();

                // package should be exported to target module
                assertTrue(source.isExported(pn, target),
                           pn + " should be exported to " + target);

                // package should not be exported to unnamed modules
                assertFalse(source.isExported(pn, unnamedModule),
                            pn + " should not be exported to unnamed modules");

            }

        }
    }

    static void assertTrue(boolean cond) {
        if (!cond) throw new RuntimeException();
    }

    static void assertTrue(boolean cond, String msg) {
        if (!cond) throw new RuntimeException(msg);
    }

    static void assertFalse(boolean cond) {
        if (cond) throw new RuntimeException();
    }

    static void assertFalse(boolean cond, String msg) {
        if (cond) throw new RuntimeException(msg);
    }

}