Artifact artifact = new DefaultArtifact("ut.simple:artifact:1.0");

        ArtifactRequest artifactRequest = new ArtifactRequest();
        artifactRequest.setArtifact(artifact);
        artifactRequest.addRepository(newTestRepository());

        ArtifactResult artifactResult = system.resolveArtifact(session, artifactRequest);
        checkArtifactResult(artifactResult, "artifact-1.0.jar");

    @Override
    public List<ArtifactResult> resolveArtifacts(
            RepositorySystemSession session, Collection<? extends ArtifactRequest> requests)
            throws ArtifactResolutionException {
        List<ArtifactResult> results = new ArrayList<>();

        for (ArtifactRequest request : requests) {
            ArtifactResult result = new ArtifactResult(request);
            results.add(result);

                }
            } else {
                List<RemoteRepository> repositories = new ArrayList<>();
                if (artifactRequest != null && artifactRequest.getRepositories() != null) {
                    repositories.addAll(artifactRequest.getRepositories());
                } else if (artifactDescriptorRequest != null && artifactDescriptorRequest.getRepositories() != null) {

            }
        } catch (ArtifactDescriptorException e) {
            throw new PluginResolutionException(plugin, e.getResult().getExceptions(), e);
        }

        try {
            ArtifactRequest request = new ArtifactRequest(pluginArtifact, repositories, REPOSITORY_CONTEXT);
            request.setTrace(trace);
            pluginArtifact = repoSystem.resolveArtifact(session, request).getArtifact();

        }

        if (!artifact.isResolved()) {
            ArtifactResult result;

            try {
                ArtifactRequest artifactRequest = new ArtifactRequest();
                artifactRequest.setArtifact(RepositoryUtils.toArtifact(artifact));
                artifactRequest.setRepositories(RepositoryUtils.toRepos(remoteRepositories));

            throws UnresolvableModelException {
        Artifact pomArtifact = new DefaultArtifact(groupId, artifactId, "", "pom", version);

        try {
            ArtifactRequest request = new ArtifactRequest(pomArtifact, repositories, context);
            request.setTrace(trace);
            pomArtifact = resolver.resolveArtifact(session, request).getArtifact();
        } catch (ArtifactResolutionException e) {

        }

        if (pomFile == null) {
            Artifact pomArtifact = new DefaultArtifact(groupId, artifactId, "", "pom", version);

            try {
                ArtifactRequest request = new ArtifactRequest(pomArtifact, repositories, context);
                request.setTrace(trace);
                pomArtifact = resolver.resolveArtifact(session, request).getArtifact();

                throw new ArtifactDescriptorException(result);
            }

            ArtifactResult resolveResult;
            try {
                ArtifactRequest resolveRequest =
                        new ArtifactRequest(pomArtifact, request.getRepositories(), request.getRequestContext());
                resolveRequest.setTrace(trace);