}

    @Override
    public DefaultConfigurableFileTree include(String... includes) {
        patternSet.include(includes);
        return this;
    }

    @Override
    public DefaultConfigurableFileTree include(Iterable<String> includes) {
        patternSet.include(includes);
        return this;
    }

    @Override
    public DefaultConfigurableFileTree include(Closure includeSpec) {

    def testFileSetConstructionWithNoBaseDirSpecified() {
        DefaultConfigurableFileTree fileSet = new DefaultConfigurableFileTree(fileResolverStub, listener, TestFiles.patternSetFactory, taskDependencyFactory, directoryFileTreeFactory())

        when:
        fileSet.contains(new File('unknown'))
        then:
        thrown(InvalidUserDataException)
    }

    def testCanVisitStructure() {

import org.gradle.api.file.ConfigurableFileTree;
import org.gradle.api.internal.file.collections.DefaultConfigurableFileCollection;
import org.gradle.api.internal.file.collections.DefaultConfigurableFileTree;
import org.gradle.api.internal.file.collections.DirectoryFileTreeFactory;
import org.gradle.api.internal.file.collections.FileCollectionAdapter;