# Async Tests { #async-tests }

You have already seen how to test your **FastAPI** applications using the provided `TestClient`. Up to now, you have only seen how to write synchronous tests, without using `async` functions.

import java.time.Duration;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZoneOffset;

/**
 * A Clock implementation that combines monotonic timing with wall-clock time.
 * <p>
 * This class provides precise time measurements using {@link System#nanoTime()}
 * while maintaining wall-clock time information in UTC. The wall-clock time
 * is computed from the monotonic duration since system start to ensure consistency

# the `VERSION` parameter
case "${VERSION}" in
devtoolset-7)
  # Download binary libstdc++ 4.4 release we are going to link against.
  # We only need the shared library, as we're going to develop against the
  # libstdc++ provided by devtoolset.
  wget "http://old-releases.ubuntu.com/ubuntu/pool/main/g/gcc-4.4/libstdc++6_4.4.3-4ubuntu5_amd64.deb" && \
      unar "libstdc++6_4.4.3-4ubuntu5_amd64.deb" && \

 * in a crawler application. This container supports both singleton and prototype component
 * instantiation patterns.
 *
 * <p>The container provides mechanisms for:
 * <ul>
 *   <li>Registering and retrieving components by name</li>
 *   <li>Managing singleton instances with lifecycle hooks</li>
 *   <li>Creating prototype instances on demand</li>

### 3. Start the MinIO Server

```sh
export MINIO_ROOT_USER=minio
export MINIO_ROOT_PASSWORD=minio123
minio server ~/export
```

> The KES instance at `https://play.min.io:7373` is meant to experiment and provides a way to get started quickly.
> Note that anyone can access or delete master keys at `https://play.min.io:7373`. You should run your own KES
> instance in production.

## Configuration Guides

import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing stemmer override dictionary operations.
 *
 * This service provides functionality for CRUD operations on stemmer override
 * dictionaries. Stemmer override dictionaries allow administrators to define
 * custom stemming rules that override the default stemming behavior for

import org.dbflute.cbean.result.PagingResultBean;
import org.dbflute.optional.OptionalEntity;

import jakarta.annotation.Resource;

/**
 * Service class for managing web crawling configurations.
 * Provides CRUD operations for web configuration settings including
 * listing, retrieving, storing, and deleting web crawling configurations.
 */
public class WebConfigService extends FessAppService {

    /**

import java.util.Map;
import org.jspecify.annotations.Nullable;

/**
 * A {@link UnicodeEscaper} that uses an array to quickly look up replacement characters for a given
 * code point. An additional safe range is provided that determines whether code points without
 * specific replacements are to be considered safe and left unescaped or should be escaped in a
 * general way.
 *

import org.codelibs.fess.suggest.entity.ElevateWord;
import org.opensearch.transport.client.Client;

/**
 * The ElevateWordSettings class manages the settings for elevate words in the suggestion system.
 * It provides methods to retrieve, add, and delete elevate words from the settings.
 *
 * <p>Constants:</p>
 * <ul>
 *   <li>{@code ELEVATE_WORD_SETTINGD_KEY} - The key for elevate word settings.</li>

type InvalidArgument GenericError

func (e InvalidArgument) Error() string {
	if e.Err != nil {
		return "Invalid arguments provided for " + e.Bucket + "/" + e.Object + ": (" + e.Err.Error() + ")"
	}
	return "Invalid arguments provided for " + e.Bucket + "/" + e.Object
}

// BucketNotFound bucket does not exist.
type BucketNotFound GenericError

func (e BucketNotFound) Error() string {