assertFalse(filter.accept(mockDir, "image.png"), "Should reject non-.txt files");
        assertFalse(filter.accept(mockDir, null), "Should reject null names");

        // Verify getPath was called three times (once for each accept call)
        verify(mockDir, times(3)).getPath();
        verifyNoMoreInteractions(mockDir);
    }

    /**
     * Defensive behavior: implementation throws NPE on null inputs by design.

    /**
     * The name or type of the error that occurred.
     * This field provides a categorization of the failure type.
     */
    public String errorName;

    /**
     * The detailed error log or stack trace for the failure.
     * This field contains the full error information for debugging purposes.
     */
    public String errorLog;

    /**
     * The number of times this URL has failed.

			default:
				// There was error in the REST request, retry after sometime as probably the peer is down.
				time.Sleep(5 * time.Second)
			}
		}
	}()
}

// Trace - send http trace request to peer nodes
func (client *peerRESTClient) Trace(ctx context.Context, traceCh chan<- []byte, traceOpts madmin.ServiceTraceOpts) {
	go func() {
		for {
			// Blocks until context is canceled or an error occurs.

«Операция» здесь — это один из HTTP-«методов».

Один из:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...и более экзотические:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

В протоколе HTTP можно обращаться к каждому пути, используя один (или несколько) из этих «методов».

---

При создании API обычно используют конкретные HTTP-методы для выполнения конкретных действий.

			Owner:     "owner",
			Quorum:    &quorum,
		}
		ok, err := l.RLock(ctx, arg)
		if err != nil {
			t.Fatal(err)
		}
		if !ok {
			t.Fatal("did not get read lock")
		}
		// RLock twice
		ok, err = l.RLock(ctx, arg)
		if err != nil {
			t.Fatal(err)
		}
		if !ok {
			t.Fatal("did not get write lock")
		}

		rResources[i] = arg.Resources[0]
	}

Burada "Operation", HTTP "method"larından birini ifade eder.

Şunlardan biri:

* `POST`
* `GET`
* `PUT`
* `DELETE`

...ve daha egzotik olanlar:

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

HTTP protokolünde, her bir path ile bu "method"lardan biri (veya birden fazlası) ile iletişim kurabilirsiniz.

---

API oluştururken, normalde belirli bir aksiyon için bu spesifik HTTP method'larını kullanırsınız.

借助 Pydantic，使用标准的 Python 类型来声明请求体。

```Python hl_lines="2  7-10 23-25"
from fastapi import FastAPI
from pydantic import BaseModel

app = FastAPI()


class Item(BaseModel):
    name: str
    price: float
    is_offer: bool | None = None


@app.get("/")
def read_root():
    return {"Hello": "World"}


@app.get("/items/{item_id}")
def read_item(item_id: int, q: str | None = None):

#### 操作 { #operation }

這裡的「操作」指的是 HTTP 的「方法」之一。

其中包括：

* `POST`
* `GET`
* `PUT`
* `DELETE`

……以及更少見的：

* `OPTIONS`
* `HEAD`
* `PATCH`
* `TRACE`

在 HTTP 協定中，你可以使用這些「方法」之一（或更多）與每個路徑進行通信。

---

在建置 API 時，你通常使用這些特定的 HTTP 方法來執行特定的動作。

通常你使用：

* `POST`：用來建立資料。
* `GET`：用來讀取資料。
* `PUT`：用來更新資料。
* `DELETE`：用來刪除資料。

                        } else {
                            return -1;
                        }
                    });
                    // Remove duplicates (equal adjacent elements) - a new, un@Incubating type will be here twice, as 2 errors are reported; use stringified JSON to compare
                    // Filtering an array is NOT in place

@NullUnmarked
public class AbstractInvocationHandlerTest extends TestCase {

  private static final ImmutableList<String> LIST1 = ImmutableList.of("one", "two");
  private static final ImmutableList<String> LIST2 = ImmutableList.of("three");

  public void testDelegate() {
    assertEquals(LIST1, ImmutableList.copyOf(newDelegatingList(LIST1)));
    assertEquals(LIST1, ImmutableList.copyOf(newDelegatingListWithEquals(LIST1)));
  }