HMACT64 hmac = new HMACT64(TEST_KEY);
            hmac.engineReset();
            verify(mockMd5, times(2)).reset(); // Once in constructor, once in reset
            verify(mockMd5, times(2)).update(any(byte[].class)); // Once in constructor, once in reset
        }
    }

    @Test
    void testEngineGetDigestLength() throws NoSuchAlgorithmException {
        // Test engineGetDigestLength()

        verify(dcerpcSecurityProvider, times(1)).wrap(mockNdrBuffer);
    }

    @Test
    void testUnwrapMethodIsCalled() throws DcerpcException {
        // Test that the unwrap method can be called without throwing an exception
        dcerpcSecurityProvider.unwrap(mockNdrBuffer);

        // Verify that the unwrap method was called exactly once with the mockNdrBuffer

            return null;
        }).when(mockDcerpcHandle).sendrecv(any(MsrpcLsarClose.class));

        // Close once
        handle.close();

        // Act
        // Try to close again
        handle.close();

        // Assert
        // Verify sendrecv was called once for open and only once for close
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcLsarOpenPolicy2.class));

     * or queued.
     */
    @Nullable ExecutionSequencer sequencer;

    /**
     * Executor the task was set to run on. Set to null when the task has been queued, run, or
     * cancelled.
     */
    @Nullable Executor delegate;

    /**
     * Set before calling delegate.execute(); set to null once run, so that it can be GCed; this

        // Act
        // Second close call
        handle.close();

        // Assert
        // sendrecv for open is called once
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcSamrOpenDomain.class));
        // sendrecv for close is called only once, even if close() is called multiple times
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcSamrCloseHandle.class));
    }

    @Test

### Creating the `Settings` only once with `lru_cache` { #creating-the-settings-only-once-with-lru-cache }

Reading a file from disk is normally a costly (slow) operation, so you probably want to do it only once and then reuse the same settings object, instead of reading it for each request.

But every time we do:

```Python
Settings()

		"Total number of bytes failed at least once to replicate in the last hour on a bucket",
		bucketL, targetArnL)
	bucketReplLastHrFailedCountMD = NewGaugeMD(bucketReplLastHrFailedCount,
		"Total number of objects which failed replication in the last hour on a bucket",
		bucketL, targetArnL)
	bucketReplLastMinFailedBytesMD = NewGaugeMD(bucketReplLastMinFailedBytes,
		"Total number of bytes failed at least once to replicate in the last full minute on a bucket",

        // Assert
        // Verify that sendrecv was called with MsrpcSamrCloseHandle
        verify(mockDcerpcHandle).sendrecv(any(MsrpcSamrCloseHandle.class));
        // Verify that close was called only once on the mockDcerpcHandle for MsrpcSamrCloseHandle
        verify(mockDcerpcHandle, times(1)).sendrecv(any(MsrpcSamrCloseHandle.class));
    }

    @Test

| `minio_cluster_replication_last_hour_failed_count`         | (_Site Replication Only_) Total number of objects which failed replication in the last full hour.        |
| `minio_cluster_replication_last_minute_failed_bytes`       | Total number of bytes failed at least once to replicate in the last full minute.                         |

## Pre-requisites

- Initially, only **one** of the sites added for replication may have data. After site-replication is successfully configured, this data is replicated to the other (initially empty) sites. Subsequently, objects may be written to any of the sites, and they will be replicated to all other sites.

- **Removing a site** is not allowed from a set of replicated sites once configured.