return t();
    }

    @Override
    public TestFile getArtifactFile() {
        return backingModule.getArtifactFile();
    }

    @Override
    public TestFile getArtifactFile(Map options) {
        return backingModule.getArtifactFile(options);
    }

    @Override
    public ModuleArtifact getArtifact() {
        return backingModule.getArtifact();

 *
 * This information is used during dependency verification (either
 * writing or validating).
 */
public interface MetadataFileSource extends PersistentModuleSource {
    int CODEC_ID = 1;

    File getArtifactFile();

    ModuleComponentArtifactIdentifier getArtifactId();

    HashCode getSha1();

    @Override
    default int getCodecId() {
        return CODEC_ID;
    }

    /**
     * Returns a file relative to this module, using a relative path.
     */
    ModuleArtifact getArtifact(String relativePath)

    TestFile getArtifactFile()

    TestFile getArtifactFile(Map options)

    TestFile getMetaDataFile()

    MavenPom getParsedPom()

    ModuleArtifact getRootMetaData()

    ModuleArtifact getSnapshotMetaData()

        when:
        TestFile artifactFile = mavenLocalModule.getArtifactFile([:])

        then:
        artifactFile != null
        artifactFile.name == 'my-artifact-1.0.jar'
    }

    def "Get artifact file for snapshot"() {
        when:
        TestFile artifactFile = snapshotMavenLocalModule.getArtifactFile()

        then:
        artifactFile != null

        this.artifactId = artifactId;
        this.artifactFile = artifactFile;
        this.sha1 = sha1;
    }

    @Override
    public File getArtifactFile() {
        return artifactFile;
    }

    @Override
    public ModuleComponentArtifactIdentifier getArtifactId() {
        return artifactId;
    }

    @Override
    public HashCode getSha1() {

        when:
        TestFile artifactFile = mavenFileModule.getArtifactFile([:])

        then:
        artifactFile != null
        artifactFile.name == 'my-artifact-1.0.jar'
    }

    def "Get artifact file for snapshot"() {
        when:
        TestFile artifactFile = snapshotMavenFileModule.getArtifactFile()

        then:
        artifactFile != null

        // The implementation jar module.
        def module = mavenRepo.module(group, artifact, version)
        def pluginModule = module.publish()
        def artifactFile = module.getArtifactFile()

        def markerModules = new ArrayList<Module>()

        pluginIds.keySet().each { id ->
            // The marker files for each plugin.

                                if (!changingModule) {
                                    File artifactFile = metadataFileSource.getArtifactFile();
                                    if (artifactFile != null && artifactFile.exists()) {
                                        // it's possible that the file is null if it has been removed from the cache for example

            .publish()
        lib.getArtifactFile(classifier: 'test-fixtures').bytes = []
        lib.pom.expectGet()
        lib.getArtifact(classifier: 'test-fixtures').expectGet()
        def libSubgroup = mavenHttpRepo.module("org.gradle.test", "lib.subgroup", "1.1")
            .publish()
        libSubgroup.getArtifactFile(classifier: 'test-fixtures').bytes = []
        libSubgroup.pom.expectGet()

    @Override
    MavenModule parent(String group, String artifactId, String version) {
        parentPom = [groupId: group, artifactId: artifactId, version: version]
        return this
    }

    TestFile getArtifactFile(Map options = [:]) {
        return getArtifact(options).file
    }

    @Override
    String getPublishArtifactVersion() {
        if (uniqueSnapshots && version.endsWith("-SNAPSHOT")) {