File fileB = newFile("file-b");
    File dir1 = newDir("dir-1");
    File dir2 = newDir("dir-2");

    assertThat(Files.fileTraverser().breadthFirst(rootDir))
        .containsExactly(rootDir, fileA, fileB, dir1, dir2);
  }

  public void testFileTraverser_multipleDirectoryLayers_breadthFirstStartsWithTopLayer()
      throws Exception {
    File fileA = newFile("file-a");
    File dir1 = newDir("dir-1");
    newFile("dir-1/file-b");

	files := []usageTestFile{
		{name: "rootfile", size: 10000},
		{name: "rootfile2", size: 10000},
		{name: "dir1/d1file", size: 2000},
		{name: "dir2/d2file", size: 300},
		{name: "dir1/dira/dafile", size: 100000},
		{name: "dir1/dira/dbfile", size: 200000},
		{name: "dir1/dira/dirasub/dcfile", size: 1000000},
		{name: "dir1/dira/dirasub/sublevel3/dccccfile", size: 10},
	}
	createUsageTestFiles(t, base, bucket, files)

    @Test
    public void testMultipleDirectories() {
        String dir1 = "/test/dir1";
        String dir2 = "/test/dir2";
        String dir3 = "/test/dir3";

        Smb2LeaseKey key1 = new Smb2LeaseKey();
        Smb2LeaseKey key2 = new Smb2LeaseKey();
        Smb2LeaseKey key3 = new Smb2LeaseKey();

        when(baseLeaseManager.requestLease(dir1, DirectoryLeaseState.DIRECTORY_READ_HANDLE)).thenReturn(key1);

            assertEquals(2, values.length);
            assertEquals("storage://fess/dir1/dir2/", values[0]);
            assertEquals("storage://fess/dir1/file2.txt", values[1]);
        }
        try (final ResponseData responseData = storageClient.doGet("storage://fess/dir1/dir2/")) {
            fail();
        } catch (ChildUrlsException e) {

            assertEquals(2, values.length);
            assertEquals("s3://fess/dir1/dir2/", values[0]);
            assertEquals("s3://fess/dir1/file2.txt", values[1]);
        }
        try (final ResponseData responseData = s3Client.doGet("s3://fess/dir1/dir2/")) {
            fail();
        } catch (ChildUrlsException e) {

        // Setup users directory files
        Files.writeString(usersDir.resolve("file1.txt"), "file1");
        Path dir1 = usersDir.resolve("dir1");
        Files.createDirectory(dir1);
        Files.writeString(dir1.resolve("file2.txt"), "file2");
        Path dir2 = dir1.resolve("dir2");
        Files.createDirectory(dir2);
        Files.writeString(dir2.resolve("file3.txt"), "file3");

            assertEquals(2, values.length);
            assertEquals("gcs://fess/dir1/dir2/", values[0]);
            assertEquals("gcs://fess/dir1/file2.txt", values[1]);
        }
        try (final ResponseData responseData = gcsClient.doGet("gcs://fess/dir1/dir2/")) {
            fail();
        } catch (ChildUrlsException e) {

        // Basic files for existing tests
        Files.writeString(usersDir.resolve("file1.txt"), "file1");
        Path dir1 = usersDir.resolve("dir1");
        Files.createDirectory(dir1);
        Files.writeString(dir1.resolve("file2.txt"), "file2");
        Path dir2 = dir1.resolve("dir2");
        Files.createDirectory(dir2);
        Files.writeString(dir2.resolve("file3.txt"), "file3");

        assertFalse(directoryLeaseManager.canCacheDirectoryListing(directoryPath));
    }

    @Test
    public void testMultipleDirectoryCaching() throws Exception {
        String dir1 = "/test/dir1";
        String dir2 = "/test/dir2";

        // Setup mock files for this test
        when(mockFile1.getName()).thenReturn("document.txt");
        when(mockFile1.length()).thenReturn(2048L);

	if err != nil {
		t.Fatalf("%s: <ERROR> %s", instanceType, err)
	}

	testCases := []struct {
		dir string
		err error
	}{
		{
			dir: "dir1/",
			err: ObjectNotFound{Bucket: bucketName, Object: "dir1/"},
		},
		{
			dir: "dir1/dir3/",