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

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

  @CanIgnoreReturnValue
  private File newDir(String name) {

<assembly xmlns="http://maven.apache.org/ASSEMBLY/2.1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/ASSEMBLY/2.1.0 http://maven.apache.org/xsd/assembly-2.1.0.xsd">
  <id>dir</id>
  <formats>
    <format>dir</format>
  </formats>
  <includeBaseDirectory>false</includeBaseDirectory>
  <componentDescriptors>
    <componentDescriptor>src/assembly/component.xml</componentDescriptor>
  </componentDescriptors>

		<mkdir dir="${target.dir}" />
		<delete dir="${plugins.dir}" />
		<mkdir dir="${plugins.dir}" />
		<!-- analysis-extension -->
		<antcall target="install.plugin">
			<param name="repo.url" value="${maven.release.repo.url}" />
			<param name="plugin.groupId" value="org/codelibs/opensearch" />
			<param name="plugin.name.prefix" value="opensearch-" />
			<param name="plugin.name" value="analysis-extension" />

		</condition>
	</target>

	<target name="download.dbflute" depends="mydbflute.check" unless="mydbflute.exists">
		<mkdir dir="${mydbflute.dir}" />
		<get dest="${target.dir}/mydbflute.zip">
			<url url="${mydbflute.url}" />
		</get>
		<unzip dest="${mydbflute.dir}" src="${target.dir}/mydbflute.zip">
			<patternset>
				<include name="lastaflute-example-waterfront-${branch.name}/mydbflute/dbflute-1.x/**" />

		<delete dir="${crawler.dir}/lib" />
		<mkdir dir="${crawler.dir}/lib" />
		<delete dir="${suggest.dir}/lib" />
		<mkdir dir="${suggest.dir}/lib" />
		<delete dir="${thumbnail.dir}/lib" />
		<mkdir dir="${thumbnail.dir}/lib" />
		<!-- annotation-api -->
		<antcall target="install.env.jar">
			<param name="repo.url" value="${maven.release.repo.url}" />
			<param name="jar.groupId" value="jakarta/annotation" />

	<target name="install.modules">
		<mkdir dir="${target.dir}" />
		<delete dir="${modules.dir}" />
		<mkdir dir="${modules.dir}" />

		<!-- analysis-common -->
		<antcall target="install.module">
			<param name="repo.url" value="${maven.release.repo.url}" />
			<param name="module.groupId" value="org/codelibs/opensearch/module" />
			<param name="module.name.prefix" value="" />
			<param name="module.name" value="analysis-common" />

        // Add multiple children
        entry.updateChild("file1.txt", 1024L, 1000L, false, 0x20, 500L, 800L);
        entry.updateChild("file2.txt", 2048L, 2000L, false, 0x20, 600L, 900L);
        entry.updateChild("dir1", 0L, 3000L, true, 0x10, 700L, 1000L);

        List<DirectoryCacheEntry.FileInfo> children = entry.getChildren();
        assertEquals(3, children.size());

        // Verify all children are present

   *     Java 8 and removed in Java 9. We do not plan to remove this API from Guava, but if you are
   *     using it, it is probably not doing what you want.
   */
  @Deprecated
  JAVA_EXT_DIRS("java.ext.dirs"),

  /** Operating system name. */
  OS_NAME("os.name"),

  /** Operating system architecture. */
  OS_ARCH("os.arch"),

  /** Operating system version. */
  OS_VERSION("os.version"),

        when(mockDir.getPath()).thenReturn("/share/folder/");

        // Implementation uses dir.getPath() to check if file should be in that path
        SmbFilenameFilter filter = (dir, name) -> {
            if (dir == null)
                return false;
            String path = dir.getPath();
            // Accept files in /share/folder/ that are text files

        try {
            Thread.sleep(20);
        } catch (InterruptedException e) {
            // ignore
        }

        File dir = new File(TEMP_DIR_PATH, baseFilename + System.currentTimeMillis());

        dir.mkdirs();
        markForDeletion(dir);

        return dir;
    }

    public synchronized File createTempFile() throws IOException {
        File tempFile = File.createTempFile(baseFilename, fileSuffix);