jdk-24/jdk/test/tools/launcher/modules/patch/PatchTest.java

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/**
 * @test
 * @library /lib/testlibrary
 * @modules jdk.compiler
 * @build PatchTest CompilerUtils jdk.testlibrary.*
 * @run testng PatchTest
 * @summary Basic test for -Xpatch
 */

import java.io.File;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import static jdk.testlibrary.ProcessTools.*;

import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import static org.testng.Assert.*;


/**
 * Compiles and launches a test that uses -Xpatch with two directories of
 * classes to override existing and add new classes to modules in the
 * boot layer.
 *
 * The classes overridden or added via -Xpatch all define a public no-arg
 * constructor and override toString to return "hi". This allows the launched
 * test to check that the overridden classes are loaded.
 */

@Test
public class PatchTest {

    // top-level source directory
    private static final String TEST_SRC = System.getProperty("test.src");

    // source/destination tree for the test module
    private static final Path SRC_DIR = Paths.get(TEST_SRC, "src");
    private static final Path MODS_DIR = Paths.get("mods");

    // source/destination tree for patch tree 1
    private static final Path SRC1_DIR = Paths.get(TEST_SRC, "src1");
    private static final Path PATCHES1_DIR = Paths.get("patches1");

    // source/destination tree for patch tree 2
    private static final Path SRC2_DIR = Paths.get(TEST_SRC, "src2");
    private static final Path PATCHES2_DIR = Paths.get("patches2");


    // the classes overridden or added with -Xpatch
    private static final String[] CLASSES = {

        // java.base = boot loader
        "java.base/java.text.Annotation",           // override class
        "java.base/java.text.AnnotationBuddy",      // add class to package
        "java.base/java.lang2.Object",              // new package

        // jdk.naming.dns = platform class loader
        "jdk.naming.dns/com.sun.jndi.dns.DnsClient",
        "jdk.naming.dns/com.sun.jndi.dns.DnsClientBuddy",
        "jdk.naming.dns/com.sun.jndi.dns2.Zone",

        // jdk.compiler = application class loaded
        "jdk.compiler/com.sun.tools.javac.Main",
        "jdk.compiler/com.sun.tools.javac.MainBuddy",
        "jdk.compiler/com.sun.tools.javac2.Main",

    };


    @BeforeTest
    public void compile() throws Exception {

        // javac -d mods/test src/test/**
        boolean compiled= CompilerUtils.compile(SRC_DIR.resolve("test"),
                                                MODS_DIR.resolve("test"));
        assertTrue(compiled, "classes did not compile");

        // javac -Xmodule:$MODULE -d patches1/$MODULE patches1/$MODULE/**
        for (Path src : Files.newDirectoryStream(SRC1_DIR)) {
            Path output = PATCHES1_DIR.resolve(src.getFileName());
            String mn = src.getFileName().toString();
            compiled  = CompilerUtils.compile(src, output, "-Xmodule:" + mn);
            assertTrue(compiled, "classes did not compile");
        }

        // javac -Xmodule:$MODULE -d patches2/$MODULE patches2/$MODULE/**
        for (Path src : Files.newDirectoryStream(SRC2_DIR)) {
            Path output = PATCHES2_DIR.resolve(src.getFileName());
            String mn = src.getFileName().toString();
            compiled  = CompilerUtils.compile(src, output, "-Xmodule:" + mn);
            assertTrue(compiled, "classes did not compile");
        }

    }

    /**
     * Run the test with -Xpatch
     */
    public void testRunWithXPatch() throws Exception {

        // value for -Xpatch
        String patchPath = PATCHES1_DIR + File.pathSeparator + PATCHES2_DIR;

        // value for -XaddExports
        String addExportsValue = "java.base/java.lang2=test"
                + ",jdk.naming.dns/com.sun.jndi.dns=test"
                + ",jdk.naming.dns/com.sun.jndi.dns2=test"
                + ",jdk.compiler/com.sun.tools.javac2=test";

        // the argument to the test is the list of classes overridden or added
        String arg = Stream.of(CLASSES).collect(Collectors.joining(","));

        int exitValue
            =  executeTestJava("-Xpatch:" + patchPath,
                               "-XaddExports:" + addExportsValue,
                               "-addmods", "jdk.naming.dns,jdk.compiler",
                               "-mp", MODS_DIR.toString(),
                               "-m", "test/jdk.test.Main", arg)
                .outputTo(System.out)
                .errorTo(System.out)
                .getExitValue();

        assertTrue(exitValue == 0);

    }

}