OutputStream out = sink.openBufferedStream();
    assertTrue(sink.wasStreamOpened());
    assertFalse(sink.wasStreamClosed());

    out.write(new byte[] {1, 2, 3, 4});
    out.close();

    assertTrue(sink.wasStreamClosed());
    assertArrayEquals(new byte[] {1, 2, 3, 4}, sink.getBytes());
  }

  public void testWrite_bytes() throws IOException {
    assertArrayEquals(new byte[0], sink.getBytes());
    sink.write(bytes);

  }

  public void testPermutationSetFourElements() {
    Iterator<List<Integer>> permutations =
        Collections2.permutations(newArrayList(1, 2, 3, 4)).iterator();
    assertNextPermutation(newArrayList(1, 2, 3, 4), permutations);
    assertNextPermutation(newArrayList(1, 2, 4, 3), permutations);
    assertNextPermutation(newArrayList(1, 4, 2, 3), permutations);
    assertNextPermutation(newArrayList(4, 1, 2, 3), permutations);

			echo -n "."
			sleep 1
		done
	done

}

# Prepare fake disks with losetup
function prepare_block_devices() {
	set -e
	mkdir -p ${WORK_DIR}/disks/ ${WORK_DIR}/mnt/
	sudo modprobe loop
	for i in 1 2 3 4; do
		dd if=/dev/zero of=${WORK_DIR}/disks/img.${i} bs=1M count=2000
		device=$(sudo losetup --find --show ${WORK_DIR}/disks/img.${i})
		sudo mkfs.ext4 -F ${device}
		mkdir -p ${WORK_DIR}/mnt/disk${i}/

<!--- reproduce this bug. Include code to reproduce, if relevant -->
<!--- and make sure you have followed https://github.com/minio/minio/tree/release/docs/debugging to capture relevant logs -->

1.
2.
3.
4.

## Context
<!--- How has this issue affected you? What are you trying to accomplish? -->
<!--- Providing context helps us come up with a solution that is most useful in the real world -->

## Regression

    testRotate(new double[] {1, 2, 3}, 1, new double[] {3, 1, 2});
    testRotate(new double[] {1, 2, 3}, 2, new double[] {2, 3, 1});
    testRotate(new double[] {1, 2, 3}, 3, new double[] {1, 2, 3});
    testRotate(new double[] {1, 2, 3}, 4, new double[] {3, 1, 2});
    testRotate(new double[] {1, 2, 3}, 5, new double[] {2, 3, 1});

    testRotate(new double[] {1, 2, 3, 4}, -9, new double[] {2, 3, 4, 1});

        }

        @Test
        void shouldReturnInetAddressHostAddressWhenWrappedIsInetAddress() {
            when(mockInetAddress.getHostAddress()).thenReturn("1.2.3.4");
            UniAddress uniAddress = new UniAddress(mockInetAddress);
            assertEquals("1.2.3.4", uniAddress.getHostAddress());
        }

        @Test
        void shouldReturnNbtAddressHostAddressWhenWrappedIsNbtAddress() {

  }

  public void testPermutationSetFourElements() {
    Iterator<List<Integer>> permutations =
        Collections2.permutations(newArrayList(1, 2, 3, 4)).iterator();
    assertNextPermutation(newArrayList(1, 2, 3, 4), permutations);
    assertNextPermutation(newArrayList(1, 2, 4, 3), permutations);
    assertNextPermutation(newArrayList(1, 4, 2, 3), permutations);
    assertNextPermutation(newArrayList(4, 1, 2, 3), permutations);

Shinsuke Sugaya <******@****.***> 1755307968 +0900

Shinsuke Sugaya <******@****.***> 1755307968 +0900

  }

  private static ClassSanityTester.FactoryMethodReturnValueTester sanityTester() {
    return new ClassSanityTester()
        .setDefault(byte[].class, new byte[] {1, 2, 3, 4})
        .setDistinctValues(byte[].class, new byte[] {1, 2, 3, 4}, new byte[] {5, 6, 7, 8})
        .setDistinctValues(String.class, "7f8005ff0e", "7f8005ff0f")
        .forAllPublicStaticMethods(HashCode.class);
  }