import java.util.Map.Entry;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;

/**
 * Tests for {@code CompactLinkedHashMap}.
 *
 * @author Louis Wasserman
 */
public class CompactLinkedHashMapTest extends TestCase {
  public static Test suite() {
    TestSuite suite = new TestSuite();
    suite.addTest(
        MapTestSuiteBuilder.using(
                new TestStringMapGenerator() {

 *
 * @author Colin Decker
 */
@AndroidIncompatible // TODO(b/230620681): Make this available (even though we won't run it).
public class CharSourceTester extends SourceSinkTester<CharSource, String, CharSourceFactory> {

  private static final ImmutableList<Method> testMethods = getTestMethods(CharSourceTester.class);

  static TestSuite tests(String name, CharSourceFactory factory, boolean testAsByteSource) {
    TestSuite suite = new TestSuite(name);

## Run the code

All the code blocks can be copied and used directly (they are actually tested Python files).

To run any of the examples, copy the code to a file `main.py`, and start `fastapi dev` with:

<div class="termy">

```console
$ <font color="#4E9A06">fastapi</font> dev <u style="text-decoration-style:single">main.py</u>
<font color="#3465A4">INFO    </font> Using path <font color="#3465A4">main.py</font>

 * existing key-value pair has no effect.
 *
 * <p>Keys and values may be null. All optional multimap methods are supported, and all returned
 * views are modifiable.
 *
 * <p>This class is not threadsafe when any concurrent operations update the multimap. Concurrent
 * read operations will work correctly if the last write <i>happens-before</i> any reads. To allow

import org.eclipse.aether.RepositorySystem;
import org.eclipse.aether.RepositorySystemSession;

import static org.apache.maven.internal.impl.Utils.map;
import static org.apache.maven.internal.impl.Utils.nonNull;

public class DefaultSession extends AbstractSession implements InternalMavenSession {

    private final MavenSession mavenSession;
    private final MavenRepositorySystem mavenRepositorySystem;

///

`status_code` 参数接收表示 HTTP 状态码的数字。

/// info | "说明"

`status_code` 还能接收 `IntEnum` 类型，比如 Python 的 <a href="https://docs.python.org/3/library/http.html#http.HTTPStatus" class="external-link" target="_blank">`http.HTTPStatus`</a>。

///

它可以：

* 在响应中返回状态码
* 在 OpenAPI 概图（及用户界面）中存档：

<img src="/img/tutorial/response-status-code/image01.png">

/// note | "笔记"

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jakarta.annotation.Resource;

/**
 * @author shinsuke
 *
 */
public class DefaultResponseProcessor implements ResponseProcessor {
    private static final Logger logger = LoggerFactory.getLogger(DefaultResponseProcessor.class);

    @Resource
    protected CrawlerContainer crawlerContainer;

    protected Transformer transformer;

 * @author Kevin Bourrillion
 * @since 2.0
 */
@GwtCompatible(serializable = true, emulated = true)
@SuppressWarnings("serial") // we're overriding default serialization
@ElementTypesAreNonnullByDefault
public abstract class ImmutableList<E> extends ImmutableCollection<E>
    implements List<E>, RandomAccess {

  /**
   * Returns a {@code Collector} that accumulates the input elements into a new {@code
   * ImmutableList}, in encounter order.

import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

/**
 * Test the default artifact collector.
 *
 */
@PlexusTest
@Deprecated
class DefaultArtifactCollectorTest {
    @Inject
    private LegacyArtifactCollector artifactCollector;

    @Inject
    private ArtifactFactory artifactFactory;

    private ArtifactSpec projectArtifact;

from typing import Union

from fastapi import Body, FastAPI
from pydantic import BaseModel, Field
from typing_extensions import Annotated

app = FastAPI()


class Item(BaseModel):
    name: str
    description: Union[str, None] = Field(
        default=None, title="The description of the item", max_length=300
    )
    price: float = Field(gt=0, description="The price must be greater than zero")
    tax: Union[float, None] = None