SecretKeySpec key = new SecretKeySpec(new byte[16], "ARCFOUR");
        byte[] mac = PacMac.calculateMacArcfourHMACMD5(3, key, TEST_DATA);
        assertNotNull(mac);
        assertEquals(16, mac.length);

        // Test with a different key usage
        byte[] mac2 = PacMac.calculateMacArcfourHMACMD5(9, key, TEST_DATA);
        assertNotNull(mac2);
        assertEquals(16, mac2.length);

        // Test with another key usage

        return path.toString();
    }

    private String path(Metadata metadata) {
        StringBuilder path = new StringBuilder(128);

        if (!metadata.getGroupId().isBlank()) {
            path.append(metadata.getGroupId().replace('.', '/')).append('/');
        }

        if (!metadata.getArtifactId().isBlank()) {
            path.append(metadata.getArtifactId()).append('/');
        }

import org.apache.maven.artifact.metadata.ArtifactMetadata;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.RepositoryRequest;
import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.RepositoryMetadataResolutionException;
import org.apache.maven.artifact.repository.metadata.Versioning;

        String dateBefore = gregorianDate();

        RemoteSnapshotMetadata metadata =
                new RemoteSnapshotMetadata(new DefaultArtifact("a:b:1-SNAPSHOT"), new Date(), null);
        metadata.merge(new Metadata());

        String dateAfter = gregorianDate();

        String ts = metadata.metadata.getVersioning().getSnapshot().getTimestamp();
        String datePart = DATE_FILTER.matcher(ts).replaceAll("");

         * same version index. Allowing the caller to pass in metadata from a previous deployment allows to re-establish
         * the association between the artifacts of the same project.
         */
        for (Iterator<? extends Metadata> it = metadatas.iterator(); it.hasNext(); ) {
            Metadata metadata = it.next();
            if (metadata instanceof PluginsMetadata pluginsMetadata) {
                it.remove();

import org.apache.maven.artifact.metadata.ArtifactMetadata;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.artifact.repository.LegacyLocalRepositoryManager;
import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.MetadataBridge;
import org.apache.maven.artifact.repository.metadata.Snapshot;

    static class ArtifactMetadataAdapter implements ArtifactMetadata {

        private final Metadata metadata;

        ArtifactMetadataAdapter(Metadata metadata) {
            this.metadata = metadata;
        }

        @Override
        public boolean storedInArtifactVersionDirectory() {
            return !metadata.getVersion().isEmpty();
        }

        @Override

import org.apache.maven.artifact.repository.metadata.ArtifactRepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.Metadata;
import org.apache.maven.artifact.repository.metadata.RepositoryMetadata;
import org.apache.maven.artifact.repository.metadata.RepositoryMetadataManager;
import org.apache.maven.artifact.repository.metadata.RepositoryMetadataResolutionException;

    public void merge(ArtifactMetadata metadata) {
        ProjectArtifactMetadata m = (ProjectArtifactMetadata) metadata;
        if (!m.file.equals(file)) {
            throw new IllegalStateException("Cannot add two different pieces of metadata for: " + getKey());
        }
    }

    @Override
    public void merge(org.apache.maven.repository.legacy.metadata.ArtifactMetadata metadata) {

        resultData.setRawData(rawData);

        // ## Assert ##
        assertEquals(rawData, resultData.getRawData());

        assertNull(resultData.serializer);
        try {
            resultData.getData();
            fail();
        } catch (CrawlerSystemException e) {
            // nothing
        }
    }

    public void test_setSerializer() {
        // ## Arrange ##