project.layout.buildDirectory.file("tmp/teŝt files/leftover/leftover").get().asFile.apply {
                                parentFile.mkdirs()
                                createNewFile()
                            }
                        }
                    }
                    useJUnitPlatform()
                }
            }

        File jar1 = new File(libDir, "test1.jar");
        File jar2 = new File(libDir, "test2.JAR");
        File notJar = new File(libDir, "test.txt");
        assertTrue(jar1.createNewFile());
        assertTrue(jar2.createNewFile());
        assertTrue(notJar.createNewFile());

        execJob.testAppendJarFile(":", buf, libDir, "/base/path/");

        String result = buf.toString();

        System.setProperty("fess.var.path", varDir.toString());
        final File testFile = new File(varDir.toFile(), "data/test.txt");
        testFile.getParentFile().mkdirs();
        testFile.createNewFile();

        // Should not throw
        action.validateFilePath(testFile.getAbsolutePath());
    }

    @Test
    public void test_validateFilePath_pathOutsideVarPath() {

        dir1.mkdirs();
        File expiredFile = new File(dir1, "expired.png");
        expiredFile.createNewFile();
        expiredFile.setLastModified(System.currentTimeMillis() - 10000L);

        File recentFile = new File(dir1, "recent.png");
        recentFile.createNewFile();
        recentFile.setLastModified(System.currentTimeMillis());

        // Override purge to avoid client operations

                return false;
            }

            // Simulate thumbnail generation
            try {
                if (!outputFile.exists()) {
                    outputFile.createNewFile();
                }
                // Write some dummy content to simulate actual thumbnail
                Files.write(outputFile.toPath(), ("thumbnail-" + thumbnailId).getBytes());
                return true;

   */
  @SuppressWarnings("GoodTime") // reading system time without TimeSource
  public static void touch(File file) throws IOException {
    checkNotNull(file);
    if (!file.createNewFile() && !file.setLastModified(System.currentTimeMillis())) {
      throw new IOException("Unable to update modification time of " + file);
    }
  }

  /**