$ echo "Hello $MY_NAME"

Hello Wade Wilson
```

</div>

////

//// tab | Windows PowerShell

<div class="termy">

```console
// Créer une variable d'environnement MY_NAME
$ $Env:MY_NAME = "Wade Wilson"

// L'utiliser avec d'autres programmes, par exemple
$ echo "Hello $Env:MY_NAME"

Hello Wade Wilson
```

</div>

////

    ["/optional-list-str", "/model-optional-list-str"],
)
def test_optional_list_str(path: str):
    client = TestClient(app)
    response = client.get(path, headers=[("p", "hello"), ("p", "world")])
    assert response.status_code == 200
    assert response.json() == {"p": ["hello", "world"]}


# =====================================================================================
# Alias


@app.get("/optional-list-alias")

  }

  @Test
  fun testPathRead() {
    assertOnPath(content = "Hello") { path ->
      val requestBody = path.asRequestBody(FileSystem.SYSTEM)

      val buffer = Buffer()
      requestBody.writeTo(buffer)
      assertThat(buffer.readUtf8()).isEqualTo("Hello")
    }
  }

  @Test
  fun testSha256() {
    val hash = "Hello".toRequestBody().sha256().hex()

@app.get("/items/")
async def read_items(commons: Annotated[dict, Depends(common_parameters)]):
    return {"message": "Hello Items!", "params": commons}


@app.get("/users/")
async def read_users(commons: Annotated[dict, Depends(common_parameters)]):
    return {"message": "Hello Users!", "params": commons}


client = TestClient(app)


async def override_dependency(q: str | None = None):

    assertThat(decompressed.header("Content-Encoding")).isNull()

    val responseString = decompressed.body.string()
    assertThat(responseString).isEqualTo("hello zstd world")
  }

  @Test
  fun testDecompressGzip() {
    val s = "hello gzip world".encodeUtf8().gzipCompress()

    val response =
      response("https://example.com/", s) {
        header("Content-Encoding", "gzip")
      }

Examples:

Source (English):

```
"Hello world"
“Hello Universe”
"He said: 'Hello'"
"The module is `__main__`"
```

Result (French):

```
"Hello world"
“Hello Universe”
"He said: 'Hello'"
"The module is `__main__`"
```

### Ellipsis

from fastapi.websockets import WebSocket

app = FastAPI()


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


@app.websocket("/ws")
async def websocket(websocket: WebSocket):
    await websocket.accept()
    await websocket.send_json({"msg": "Hello WebSocket"})
    await websocket.close()


def test_read_main():
    client = TestClient(app)
    response = client.get("/")

@pytest.mark.parametrize(
    "path",
    [
        "/optional-bytes",
        "/optional-uploadfile",
    ],
)
def test_optional(path: str):
    client = TestClient(app)
    response = client.post(path, files=[("p", b"hello")])
    assert response.status_code == 200
    assert response.json() == {"file_size": 5}


# =====================================================================================
# Alias

    ["/optional-list-str", "/model-optional-list-str"],
)
def test_optional_list_str(path: str):
    client = TestClient(app)
    response = client.post(path, json={"p": ["hello", "world"]})
    assert response.status_code == 200
    assert response.json() == {"p": ["hello", "world"]}


# =====================================================================================
# Alias

@pytest.mark.parametrize(
    "path",
    [
        "/list-bytes",
        "/list-uploadfile",
    ],
)
def test_list(path: str):
    client = TestClient(app)
    response = client.post(path, files=[("p", b"hello"), ("p", b"world")])
    assert response.status_code == 200
    assert response.json() == {"file_size": [5, 5]}


# =====================================================================================
# Alias