import org.jspecify.annotations.Nullable;

/**
 * Tests for {@code MoreCollectors}.
 *
 * @author Louis Wasserman
 */
@GwtCompatible
@NullMarked
public class MoreCollectorsTest extends TestCase {
  public void testToOptionalEmpty() {
    assertThat(Stream.empty().collect(toOptional())).isEmpty();
  }

  public void testToOptionalSingleton() {

import org.jspecify.annotations.NullUnmarked;

/**
 * Tests for the {@link UrlEscapers} class.
 *
 * @author David Beaumont
 */
@GwtCompatible
@NullUnmarked
public class UrlEscapersTest extends TestCase {
  public void testUrlFormParameterEscaper() {
    UnicodeEscaper e = (UnicodeEscaper) urlFormParameterEscaper();
    // Verify that these are the same escaper (as documented)

 * the {@code ForwardingConcurrentMap}.
 *
 * @author Charles Fry
 * @since 2.0
 */
@GwtCompatible
public abstract class ForwardingConcurrentMap<K, V> extends ForwardingMap<K, V>
    implements ConcurrentMap<K, V> {

  /** Constructor for use by subclasses. */
  protected ForwardingConcurrentMap() {}

  @Override
  protected abstract ConcurrentMap<K, V> delegate();

 * non-null bound if possible, let's require a non-null bound here.
 *
 * TODO(cpovirk): Elaborate on "wouldn't behave as users might expect."
 */
public abstract class TypeParameter<T> extends TypeCapture<T> {

  final TypeVariable<?> typeVariable;

  protected TypeParameter() {
    Type type = capture();
    checkArgument(type instanceof TypeVariable, "%s should be a type variable.", type);

/**
 * Represents a model pulled from a repository
 *
 * @since 4.0.0
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class ArtifactModelSource extends FileSource implements ModelSource {
    private final String groupId;

    private final String artifactId;

    private final String version;

    private final int hashCode;

    @Deprecated

/**
 * Wraps an ordinary {@link File} as a model source.
 *
 * @deprecated use {@code org.apache.maven.api.services.ModelBuilder} instead
 */
@Deprecated(since = "4.0.0")
public class FileModelSource extends FileSource implements ModelSource2 {

    /**
     * Creates a new model source backed by the specified file.
     *
     * @param pomFile The POM file, must not be {@code null}.
     */

import org.eclipse.aether.RepositoryEvent;
import org.eclipse.aether.transfer.MetadataNotFoundException;
import org.slf4j.Logger;

/**
 */
class LoggingRepositoryListener extends AbstractRepositoryListener {

    private final Logger logger;

    LoggingRepositoryListener(Logger logger) {
        this.logger = logger;
    }

    @Override

import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;

class DefaultArtifactDescriptorReaderTest extends AbstractRepositoryTestCase {

    @Test
    void testMng5459() throws Exception {
        // prepare
        DefaultArtifactDescriptorReader reader =

import org.apache.maven.plugin.prefix.NoPluginFoundForPrefixException;
import org.apache.maven.plugin.version.PluginVersionResolutionException;

/**
 */
public class LifecycleTaskSegmentCalculatorStub extends DefaultLifecycleTaskSegmentCalculator {
    public static final String CLEAN = "clean";

    public static final String AGGR = "aggr";

    public static final String INSTALL = "install";

            Layout l = layout.get(key);
            if (l != null) {
                l.clearValue();
            }
        }
        return old;
    }

    void putAllSubstituted(Map<? extends String, ? extends String> m) {
        storage.putAll(m);
    }

    public String put(String key, List<String> commentLines, List<String> valueLines) {
        commentLines = new ArrayList<>(commentLines);