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

/**
 * Tests {@code Exclusion}.
 *
 */
class ExclusionTest {

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

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

        new Exclusion().equals(new Exclusion());
    }

    @Test
    void testEqualsIdentity() {

    }

    private static boolean exclusionsEquals(List<Exclusion> a, List<Exclusion> b) {
        if (a.size() != b.size()) {
            return false;
        }

        Iterator<Exclusion> aI = a.iterator();
        Iterator<Exclusion> bI = b.iterator();

        while (aI.hasNext()) {
            Exclusion aD = aI.next();
            Exclusion bD = bI.next();

            @Nonnull
            @Override
            public Collection<Exclusion> getExclusions() {
                return new MappedCollection<>(dependency.getExclusions(), this::toExclusion);
            }

            private Exclusion toExclusion(org.apache.maven.api.model.Exclusion exclusion) {
                return new Exclusion() {
                    @Nullable
                    @Override

            return addDependency(groupId, artifactId, version, scope, (Exclusion) null);
        }

        public ProjectBuilder addDependency(
                String groupId, String artifactId, String version, String scope, Exclusion exclusion) {
            return addDependency(groupId, artifactId, version, scope, null, exclusion);
        }

        public ProjectBuilder addDependency(

            return addDependency(groupId, artifactId, version, scope, (Exclusion) null);
        }

        public ProjectBuilder addDependency(
                String groupId, String artifactId, String version, String scope, Exclusion exclusion) {
            return addDependency(groupId, artifactId, version, scope, null, exclusion);
        }

        public ProjectBuilder addDependency(

     * @param includes the patterns of files to include, or null/empty for including all files
     * @param excludes the patterns of files to exclude, or null/empty for no exclusion
     * @param useDefaultExcludes whether to augment excludes with default SCM exclusion patterns
     * @return a PathMatcher that can be used to test if paths should be included
     * @throws NullPointerException if baseDirectory is null
     */
    @Nonnull

                Dependency target, Dependency source, boolean sourceDominant, Map<Object, Object> context) {
            List<Exclusion> tgt = target.getExclusions();
            if (tgt.isEmpty()) {
                List<Exclusion> src = source.getExclusions();

                for (Exclusion element : src) {
                    Exclusion clone = element.clone();
                    target.addExclusion(clone);
                }
            }
        }

        return extension.getGroupId() + ':' + extension.getArtifactId();
    }

    @Override
    protected Object getExclusionKey(Exclusion exclusion) {
        return exclusion.getGroupId() + ':' + exclusion.getArtifactId();
    }

    protected String extrapolateChildUrl(String parentUrl, boolean appendPath, Map<Object, Object> context) {
        return parentUrl;
    }

package org.apache.maven.artifact.resolver.filter;

import java.util.List;

import org.apache.maven.artifact.Artifact;

/**
 * Filter to exclude from a list of artifact patterns.
 *
 * TODO I think this is equiv. to exclusion set filter in maven-core
 */
public class ExcludesArtifactFilter extends IncludesArtifactFilter {
    public ExcludesArtifactFilter(List<String> patterns) {
        super(patterns);
    }

    @Override

        }
    }

    /**
     * KeyComputer for Exclusion
     */
    private class ExclusionKeyComputer implements KeyComputer<Exclusion> {
        @Override
        public Object key(Exclusion exclusion) {
            return getExclusionKey(exclusion);
        }
    }

    /**