if (files != null) {
        for (File f : files) {
          if (!delete(f)) {
            return false;
          }
        }
      }
    }

    if (!file.delete()) {
      logger.log(Level.WARNING, "couldn't delete file: {0}", new Object[] {file});
      return false;
    }

    return true;
  }

			b.Fatal(err)
		}
	}
}

func TestEncodeDecodeServerSystemConfig(t *testing.T) {
	v := ServerSystemConfig{}
	var buf bytes.Buffer
	msgp.Encode(&buf, &v)

	m := v.Msgsize()
	if buf.Len() > m {
		t.Log("WARNING: TestEncodeDecodeServerSystemConfig Msgsize() is inaccurate")
	}

	vn := ServerSystemConfig{}
	err := msgp.Decode(&buf, &vn)
	if err != nil {
		t.Error(err)
	}

	buf.Reset()
	msgp.Encode(&buf, &v)

			b.Fatal(err)
		}
	}
}

func TestEncodeDecodeBucketMetadata(t *testing.T) {
	v := BucketMetadata{}
	var buf bytes.Buffer
	msgp.Encode(&buf, &v)

	m := v.Msgsize()
	if buf.Len() > m {
		t.Log("WARNING: TestEncodeDecodeBucketMetadata Msgsize() is inaccurate")
	}

	vn := BucketMetadata{}
	err := msgp.Decode(&buf, &vn)
	if err != nil {
		t.Error(err)
	}

	buf.Reset()
	msgp.Encode(&buf, &v)

			b.Fatal(err)
		}
	}
}

func TestEncodeDecodehealingTracker(t *testing.T) {
	v := healingTracker{}
	var buf bytes.Buffer
	msgp.Encode(&buf, &v)

	m := v.Msgsize()
	if buf.Len() > m {
		t.Log("WARNING: TestEncodeDecodehealingTracker Msgsize() is inaccurate")
	}

	vn := healingTracker{}
	err := msgp.Decode(&buf, &vn)
	if err != nil {
		t.Error(err)
	}

	buf.Reset()
	msgp.Encode(&buf, &v)

         *
         * @param source    the source value
         * @param fieldName a description of the field being interpolated. The implementation may use this to
         *                  log stuff
         * @return the interpolated value
         */
        String transform(String source, String fieldName);
    }

只有所有 `startup` 事件处理器运行完毕，**FastAPI** 应用才开始接收请求。

## `shutdown` 事件

使用 `shutdown` 事件声明 `app` 关闭时运行的函数：

```Python hl_lines="6"
{!../../docs_src/events/tutorial002.py!}
```

此处，`shutdown` 事件处理器函数在 `log.txt` 中写入一行文本 `Application shutdown`。

/// info | "说明"

`open()` 函数中，`mode="a"` 指的是**追加**。因此这行文本会添加在文件已有内容之后，不会覆盖之前的内容。

///

/// tip | "提示"

注意，本例使用 Python `open()` 标准函数与文件交互。

	"istio.io/istio/istioctl/pkg/ztunnelconfig"
	"istio.io/istio/operator/cmd/mesh"
	"istio.io/istio/pkg/cmd"
	"istio.io/istio/pkg/collateral"
	"istio.io/istio/pkg/config/constants"
	"istio.io/istio/pkg/log"
	"istio.io/istio/tools/bug-report/pkg/bugreport"
)

const (
	// Location to read istioctl defaults from
	defaultIstioctlConfig = "$HOME/.istioctl/config.yaml"
)

const (
	FlagCharts = "charts"
)

/**
 * @author mbechler
 *
 */
@SuppressWarnings ( {
    "javadoc", "restriction"
} )
@RunWith ( Parameterized.class )
public class KerberosTest extends BaseCIFSTest {

    private static final Logger log = LoggerFactory.getLogger(KerberosTest.class);


    /**
     * @param properties
     */
    public KerberosTest ( String name, Map<String, String> properties ) {
        super(name, properties);
    }

  // The UID is meant to track the round trip (request/response) between the KAS and the WebHook, not the user request.
  // It is suitable for correlating log entries between the webhook and apiserver, for either auditing or debugging.
  optional string uid = 1;

  // Kind is the fully-qualified type of object being submitted (for example, v1.Pod or autoscaling.v1.Scale)

  // The UID is meant to track the round trip (request/response) between the KAS and the WebHook, not the user request.
  // It is suitable for correlating log entries between the webhook and apiserver, for either auditing or debugging.
  optional string uid = 1;

  // Kind is the fully-qualified type of object being submitted (for example, v1.Pod or autoscaling.v1.Scale)