```txt
Hello, World from Flask!
```

E se você for até <a href="http://localhost:8000/v2" class="external-link" target="_blank">http://localhost:8000/v2</a>, você verá o retorno do FastAPI:

```JSON
{
    "message": "Hello World"
}

    )  # primary goal of this test


def test_response():
    response = client.get("/", headers={"someheader": "hello"})
    assert response.status_code == status.HTTP_200_OK

  }

  @Test fun get() {
    server.enqueue(MockResponse(body = "hello, Jetty HTTP Client"))

    val request =
      client
        .newRequest(server.url("/").toUri())
        .header("Accept", "text/plain")
    val response = request.send()
    assertThat(response.status).isEqualTo(200)
    assertThat(response.contentAsString).isEqualTo("hello, Jetty HTTP Client")

    val recorded = server.takeRequest()

```txt
Hello, World from Flask!
```

Und wenn Sie auf <a href="http://localhost:8000/v2" class="external-link" target="_blank">http://localhost:8000/v2</a> gehen, sehen Sie die Response von FastAPI:

```JSON
{
    "message": "Hello World"
}

package org.apache.maven.lifecycle.test;

/**
 * Hello world!
 *
 */
public class App
{
    public static void main( String[] args )
    {
        System.out.println( "Hello World!" );
    }

  @Test
  fun singleElement() {
    val tags = EmptyTags.plus(String::class, "hello")
    assertThat(tags[String::class]).isEqualTo("hello")
  }

  @Test
  fun multipleElements() {
    val tags =
      EmptyTags
        .plus(String::class, "hello")
        .plus(Integer::class, 5 as Integer)
    assertThat(tags[String::class]).isEqualTo("hello")
    assertThat(tags[Integer::class]).isEqualTo(5)
  }

  // Responses are returned in the same order that they are enqueued.
  Chat chat = new Chat(baseUrl);

  chat.loadMore();
  assertEquals("hello, world!", chat.messages());

  chat.loadMore();
  chat.loadMore();
  assertEquals(""
      + "hello, world!\n"
      + "sup, bra?\n"
      + "yo dog", chat.messages());

  // Optional: confirm that your app made the HTTP requests you were expecting.

from fastapi.testclient import TestClient

app = FastAPI()


@app.get("/")
async def read_main():
    return {"msg": "Hello World"}


client = TestClient(app)


def test_read_main():
    response = client.get("/")
    assert response.status_code == 200

    void testToString() {
        // Given
        SpnegoException ex = new SpnegoException("hello");

        // When
        String s = ex.toString();

        // Then
        assertTrue(s.contains("jcifs.spnego.SpnegoException"));
        assertTrue(s.contains("hello"));
    }

    @Test
    @DisplayName("Should serialize and deserialize preserving message and cause")

async def get_token(token: Annotated[str, Depends(oauth2_scheme)]) -> str:
    return token


app = FastAPI(dependencies=[Depends(get_token)])


@app.get("/")
async def root():
    return {"message": "Hello World"}


@app.get(
    "/with-oauth2-scheme",
    dependencies=[Security(oauth2_scheme, scopes=["read", "write"])],
)
async def read_with_oauth2_scheme():
    return {"message": "Admin Access"}