// so there is no object state put at risk by stopping the threads abruptly. In some cases a test
  // may put a thread into an uninterruptible operation intentionally, so there is no other way to
  // clean up these threads.
  @SuppressWarnings("deprecation")
  @Override
  public void tearDown() throws Exception {
    stop();
    join();

    if (uncaughtThrowable != null) {

This can be very useful for setting up **resources** that you need to use for the whole app, and that are **shared** among requests, and/or that you need to **clean up** afterwards. For example, a database connection pool, or loading a shared machine learning model.

## Use Case { #use-case }

Let's start with an example **use case** and then see how to solve it with this.

        // Create SuggestJob after all components are registered
        suggestJob = new SuggestJob();
    }

    @Override
    public void tearDown() throws Exception {
        // Clean up temp directory
        if (tempDir != null && tempDir.exists()) {
            deleteDirectory(tempDir);
        }
        super.tearDown();
    }

    private void createRequiredDirectories() {

     * and cleaning up quoted strings.
     *
     * @param list the list to retrieve the value from
     * @param index the index of the value to retrieve
     * @return the cleaned value at the specified index, or empty string if index is out of bounds
     */
    static String getValue(final List<String> list, final int index) {
        if (index >= list.size()) {
            return StringUtil.EMPTY;

		}

		if err := tx.Find(reflectResults.Addr().Interface()).Error; err != nil {
			return err
		}
	}

	fieldValues := make([]interface{}, len(relForeignFields))

	// clean up old values before preloading
	switch reflectValue.Kind() {
	case reflect.Struct:
		switch rel.Type {
		case schema.HasMany, schema.Many2Many:

            fail("Failed to call protected request method: " + e.getMessage());
            return null;
        }
    }

    @Override
    public void tearDown() throws Exception {
        // Clean up system properties
        System.clearProperty("fess.search_engine.http_address");
        System.clearProperty("fesen.http.url");
        super.tearDown();
    }

        if (handle != null) {
            handle.setActive(false);
            // Cancel any pending notifications
            cancelNotification(handle);
            // Clean up failure count to prevent memory leak
            failureCounts.remove(directoryPath);
        }
    }

    /**
     * Start asynchronous notification monitoring
     *

			}
		})
	}
}

func Test_pathNeedsClean(t *testing.T) {
	type pathTest struct {
		path, result string
	}

	cleantests := []pathTest{
		// Already clean
		{"", "."},
		{"abc", "abc"},
		{"abc/def", "abc/def"},
		{"a/b/c", "a/b/c"},
		{".", "."},
		{"..", ".."},
		{"../..", "../.."},
		{"../../abc", "../../abc"},
		{"/abc", "/abc"},

		}

		// As this is path in the URL, we should use path package, not filepath package.
		// On MS Windows, filepath.Clean() converts into Windows path style ie `/foo` becomes `\foo`
		u.Path = path.Clean(u.Path)
		if isEmptyPath(u.Path) {
			return ep, fmt.Errorf("empty or root path is not supported in URL endpoint")
		}

        tempDir = Files.createTempDirectory("datastore-test").toFile();
        tempDir.deleteOnExit();
    }

    @Override
    public void tearDown() throws Exception {
        // Clean up temporary files
        if (tempDir != null && tempDir.exists()) {
            deleteDirectory(tempDir);
        }
        super.tearDown();
    }

    private void deleteDirectory(File dir) {