* <a href="https://github.com/swagger-api/swagger-ui" class="external-link" target="_blank"><strong>Swagger UI</strong></a>, con exploración interactiva, llama y prueba tu API directamente desde tu navegador.

![Swagger UI interaction](https://fastapi.tiangolo.com/img/index/index-03-swagger-02.png)

* Documentación alternativa de la API con <a href="https://github.com/Rebilly/ReDoc" class="external-link" target="_blank"><strong>ReDoc</strong></a>.

from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float


class ResponseMessage(BaseModel):
    message: str


class User(BaseModel):
    username: str
    email: str


@app.post("/items/", response_model=ResponseMessage, tags=["items"])
async def create_item(item: Item):
    return {"message": "Item received"}

 * implementation.
 */
@GwtIncompatible
public class SortedSetTestSuiteBuilder<E> extends SetTestSuiteBuilder<E> {
  public static <E> SortedSetTestSuiteBuilder<E> using(TestSortedSetGenerator<E> generator) {
    SortedSetTestSuiteBuilder<E> builder = new SortedSetTestSuiteBuilder<>();
    builder.usingGenerator(generator);
    return builder;
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override

import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import junit.framework.TestCase;

/**
 * Test class for {@link LittleEndianDataInputStream}.
 *
 * @author Chris Nokleberg
 */
public class LittleEndianDataInputStreamTest extends TestCase {

  private byte[] data;

  @Override
  protected void setUp() throws Exception {
    super.setUp();

      }
    }.test();
  }

  public void testListIterator_tooLow() {
    assertThrows(IndexOutOfBoundsException.class, () -> getList().listIterator(-1));
  }

  public void testListIterator_tooHigh() {
    assertThrows(
        IndexOutOfBoundsException.class, () -> getList().listIterator(getNumElements() + 1));
  }

  public void testListIterator_atSize() {

 * implementation.
 */
@GwtIncompatible
public class SortedSetTestSuiteBuilder<E> extends SetTestSuiteBuilder<E> {
  public static <E> SortedSetTestSuiteBuilder<E> using(TestSortedSetGenerator<E> generator) {
    SortedSetTestSuiteBuilder<E> builder = new SortedSetTestSuiteBuilder<>();
    builder.usingGenerator(generator);
    return builder;
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override

import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.EOFException;
import java.io.IOException;
import junit.framework.TestCase;

/**
 * Test class for {@link LittleEndianDataInputStream}.
 *
 * @author Chris Nokleberg
 */
public class LittleEndianDataInputStreamTest extends TestCase {

  private byte[] data;

  @Override
  protected void setUp() throws Exception {
    super.setUp();

                    .session((Session) java.lang.reflect.Proxy.newProxyInstance(
                            Session.class.getClassLoader(),
                            new Class[] {Session.class},
                            (Object proxy, Method method, Object[] args) -> {
                                if ("getSystemProperties".equals(method.getName())) {

    String test = "abc" + Character.MIN_HIGH_SURROGATE;
    assertThrows(IllegalArgumentException.class, () -> escapeAsString(NOP_ESCAPER, test));
    assertThrows(IllegalArgumentException.class, () -> escapeAsString(SIMPLE_ESCAPER, test));
  }

  public void testNullInput() {
    UnicodeEscaper e = SIMPLE_ESCAPER;
    assertThrows(NullPointerException.class, () -> e.escape((String) null));
  }

  public void testBadStrings() {

        .createTestSuite();
  }

  @SuppressWarnings("rawtypes") // class literals
  @Override
  protected List<Class<? extends AbstractTester>> getTesters() {
    List<Class<? extends AbstractTester>> testers = copyToList(super.getTesters());
    testers.add(NavigableSetNavigationTester.class);
    return testers;
  }