* @param sources the sources to concatenate
   * @return a {@code CharSource} containing the concatenated data
   * @throws NullPointerException if any of {@code sources} is {@code null}
   * @since 15.0
   */
  public static CharSource concat(CharSource... sources) {
    return concat(ImmutableList.copyOf(sources));
  }

  /**
   * Returns a view of the given character sequence as a {@link CharSource}. The behavior of the

   * @param sources the sources to concatenate
   * @return a {@code CharSource} containing the concatenated data
   * @throws NullPointerException if any of {@code sources} is {@code null}
   * @since 15.0
   */
  public static CharSource concat(CharSource... sources) {
    return concat(ImmutableList.copyOf(sources));
  }

  /**
   * Returns a view of the given character sequence as a {@link CharSource}. The behavior of the

        String repositoryId,
        String repositoryUrl,
        String resourceName,
        @Nullable Path file) {
    TransferResourceIdentifier(TransferResource resource) {
        this(resource.getRepositoryId(), resource.getRepositoryUrl(), resource.getResourceName(), resource.getPath());
    }

        TransferEvent transferStartedEvent = event(session, resource, TransferEvent.EventType.STARTED);
        TransferEvent transferProgressedEvent = event(session, resource, TransferEvent.EventType.PROGRESSED);
        TransferEvent transferSucceededEvent = event(session, resource, TransferEvent.EventType.SUCCEEDED);

        listener.transferInitiated(transferInitiatedEvent);

import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Tests {@code Resource}.
 *
 */
class ResourceTest {

    @Test
    void testHashCodeNullSafe() {
        new Resource().hashCode();
    }

    @Test
    void testEqualsNullSafe() {
        assertFalse(new Resource().equals(null));

        new Resource().equals(new Resource());
    }

    @Test
    void testEqualsIdentity() {

import org.apache.maven.wagon.resource.Resource;

/**
 * Wagon used for test cases that annotate some methods. Note that this is not a thread-safe implementation.
 */
public class TestFileWagon extends FileWagon {
    private TestTransferListener testTransferListener;
    private boolean insideGet;

    @Deprecated

 * Maven POM files and resolving related project POMs.
 *
 * <p>The interface provides two types of sources:</p>
 * <ul>
 *   <li>Build sources: Used for POM files of projects being built by Maven in the filesystem.
 *       These sources support resolving related POMs using the {@link ModelLocator}.</li>
 *   <li>Resolved sources: Used for artifacts that have been resolved by Maven from repositories

            throws TransferFailedException, ResourceDoesNotExistException, AuthorizationException {
        Resource resource = inputData.getResource();

        String content = expectedContent.get(resource.getName());

        if (content != null) {
            resource.setContentLength(content.length());
            resource.setLastModified(System.currentTimeMillis());

        }
    }

    private final class TransferResourceAndSize {

        private final TransferResource resource;
        private final long transferredBytes;

        private TransferResourceAndSize(TransferResource resource, long transferredBytes) {
            this.resource = resource;
            this.transferredBytes = transferredBytes;
        }
    }

                        }
                    },
                    true))) {
                TransferResource resource =
                        new TransferResource(null, null, "http://maven.org/test/test-resource", new File(""), null);
                resource.setContentLength(size - 1);

                DefaultRepositorySystemSession session =