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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @summary Tests to verify jimage 'extract' action
 * @library /test/lib
 * @modules jdk.jlink/jdk.tools.jimage
 * @build jdk.test.lib.Asserts
 * @run main/othervm JImageExtractTest
 */

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileAttribute;
import java.nio.file.attribute.PosixFilePermission;
import java.nio.file.attribute.PosixFilePermissions;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import java.util.stream.Collectors;

import static jdk.test.lib.Asserts.assertEquals;
import static jdk.test.lib.Asserts.assertTrue;

public class JImageExtractTest extends JImageCliTest {
    public void testExtract() throws IOException {
        jimage("extract", getImagePath())
                .assertSuccess()
                .resultChecker(r -> {
                    assertTrue(r.output.isEmpty(), "Output is not expected");
                });
        verifyExplodedImage(Paths.get("."));
    }

    public void testExtractHelp() {
        for (String opt : Arrays.asList("-h", "--help")) {
            jimage("extract", "--help")
                    .assertSuccess()
                    .resultChecker(r -> {
                        // extract  -  descriptive text
                        assertMatches("\\s+extract\\s+-\\s+.*", r.output);
                    });
        }
    }

    public void testExtractToDir() throws IOException {
        Path tmp = Files.createTempDirectory(Paths.get("."), getClass().getName());
        jimage("extract", "--dir", tmp.toString(), getImagePath())
                .assertSuccess()
                .resultChecker(r -> {
                    assertTrue(r.output.isEmpty(), "Output is not expected");
                });
        verifyExplodedImage(tmp);
    }

    public void testExtractNoImageSpecified() {
        jimage("extract", "")
                .assertFailure()
                .assertShowsError();
    }

    public void testExtractNotAnImage() throws IOException {
        Path tmp = Files.createTempFile(Paths.get("."), getClass().getName(), "not_an_image");
        jimage("extract", tmp.toString())
                .assertFailure()
                .assertShowsError();
    }

    public void testExtractNotExistingImage() throws IOException {
        Path tmp = Paths.get(".", "not_existing_image");
        Files.deleteIfExists(tmp);
        jimage("extract", tmp.toString())
                .assertFailure()
                .assertShowsError();
    }

    public void testExtractToUnspecifiedDir() {
        jimage("extract", "--dir", "--", getImagePath())
                .assertFailure()
                .assertShowsError();
    }

    public void testExtractToNotExistingDir() throws IOException {
        Path tmp = Files.createTempDirectory(Paths.get("."), getClass().getName());
        Files.delete(tmp);
        jimage("extract", "--dir", tmp.toString(), getImagePath())
                .assertSuccess()
                .resultChecker(r -> {
                    assertTrue(r.output.isEmpty(), "Output is not expected");
                });
        verifyExplodedImage(tmp);
    }

    public void testExtractFromDir() {
        Path imagePath = Paths.get(getImagePath());
        Path imageDirPath = imagePath.subpath(0, imagePath.getNameCount() - 1);
        jimage("extract", imageDirPath.toString())
                .assertFailure()
                .assertShowsError();
    }

    public void testExtractToDirBySymlink() throws IOException {
        Path tmp = Files.createTempDirectory(Paths.get("."), getClass().getName());
        Path symlink;
        try {
            symlink = Files.createSymbolicLink(Paths.get(".", "symlink"), tmp);
        } catch (IOException|UnsupportedOperationException e) {
            // symlinks are not supported
            // nothing to test
            return;
        }

        jimage("extract", "--dir", symlink.toString(), getImagePath())
                .assertSuccess()
                .resultChecker(r -> {
                    assertTrue(r.output.isEmpty(), "Output is not expected");
                });
        verifyExplodedImage(tmp);
    }

    public void testExtractToReadOnlyDir() throws IOException {
        Set<PosixFilePermission> perms = PosixFilePermissions.fromString("r-xr--r--");
        FileAttribute<Set<PosixFilePermission>> atts = PosixFilePermissions.asFileAttribute(perms);
        Path tmp = Files.createTempDirectory(Paths.get("."), getClass().getName(), atts);
        jimage("extract", "--dir", tmp.toString(), getImagePath())
                .assertFailure()
                .assertShowsError();
    }

    public void testExtractToNotEmptyDir() throws IOException {
        Path tmp = Files.createTempDirectory(Paths.get("."), getClass().getName());
        Files.createFile(Paths.get(tmp.toString(), ".not_empty"));
        jimage("extract", "--dir", tmp.toString(), getImagePath())
                .assertSuccess()
                .resultChecker(r -> {
                    assertTrue(r.output.isEmpty(), "Output is not expected");
                });
    }

    public void testExtractToFile() throws IOException {
        Path tmp = Files.createTempFile(Paths.get("."), getClass().getName(), "not_a_dir");
        jimage("extract", "--dir", tmp.toString(), getImagePath())
                .assertFailure()
                .assertShowsError();
    }

    private void verifyExplodedImage(Path imagePath) throws IOException {
        Set<Path> allModules = Files.walk(imagePath, 1).collect(Collectors.toSet());
        assertTrue(allModules.stream().anyMatch(p -> "java.base".equals(p.getFileName().toString())),
                "Exploded image contains java.base module.");

        Set<Path> badModules = allModules.stream()
                .filter(p -> !Files.exists(p.resolve("module-info.class")))
                .collect(Collectors.toSet());
        assertEquals(badModules, new HashSet<Path>() {{ add(imagePath); }},
                "There are no exploded modules with missing 'module-info.class'");
    }

    public static void main(String[] args) throws Throwable {
        new JImageExtractTest().runTests();
    }
}