File testDir = tmpDir.testDirectory
    FileResolver fileResolverStub = resolver(testDir)
    FileCollectionObservationListener listener = Mock()

    PatternFilterable getPatternSet() {
        return fileTree
    }

    void setup() {
        fileTree = new DefaultConfigurableFileTree(fileResolverStub, listener, TestFiles.patternSetFactory, taskDependencyFactory, directoryFileTreeFactory())

            return RelativePath.parse(false, parentPath, path);
        }

        @Override
        public FileTree getSource() {
            return getSourceRootsForThisSpec().getAsFileTree().matching(this.getPatternSet());
        }

        @Override
        public FileTree getAllSource() {
            final ImmutableList.Builder<FileTreeInternal> builder = ImmutableList.builder();