r.mu.Lock()
	defer r.mu.Unlock()
	getDst := func(n int) []byte {
		if cap(dst) < n {
			return make([]byte, n)
		}
		return dst[:n]
	}

	if r.w == r.r {
		if r.isFull {
			buf := getDst(r.size)
			copy(buf, r.buf[r.r:])
			copy(buf[r.size-r.r:], r.buf[:r.w])
			return buf
		}
		return nil
	}

	if r.w > r.r {
		buf := getDst(r.w - r.r)
		copy(buf, r.buf[r.r:r.w])

  public void testSubList_startNegative() {
    assertThrows(IndexOutOfBoundsException.class, () -> getList().subList(-1, 0));
  }

  public void testSubList_endTooLarge() {
    assertThrows(IndexOutOfBoundsException.class, () -> getList().subList(0, getNumElements() + 1));
  }

  public void testSubList_startGreaterThanEnd() {
    try {
      getList().subList(1, 0);
      fail("subList(1, 0) should throw");

  public void testSubList_startNegative() {
    assertThrows(IndexOutOfBoundsException.class, () -> getList().subList(-1, 0));
  }

  public void testSubList_endTooLarge() {
    assertThrows(IndexOutOfBoundsException.class, () -> getList().subList(0, getNumElements() + 1));
  }

  public void testSubList_startGreaterThanEnd() {
    try {
      getList().subList(1, 0);
      fail("subList(1, 0) should throw");

     * @return the field value
     * @throws IllegalAccessRuntimeException {@link IllegalAccessException} if an error occurs
     * @see #getInt(Field, Object)
     */
    public static int getInt(final Field field) throws IllegalAccessRuntimeException {
        assertArgumentNotNull("field", field);

        return getInt(field, null);
    }

    /**
     * Returns the value of a {@link Field} as an int.
     *

        ftpInfo = new FtpClient.FtpInfo(value, Constants.UTF_8);
        assertEquals(value, ftpInfo.toUrl());
        assertEquals("123.123.123.123:9999", ftpInfo.getCacheKey());
        assertEquals("123.123.123.123", ftpInfo.getHost());
        assertEquals(9999, ftpInfo.getPort());
        assertEquals("/", ftpInfo.getParent());
        assertNull(ftpInfo.getName());

        value = "ftp://123.123.123.123/test.txt";

        // Next field (4 bytes) - offset to next entry
        int next = bb.getInt();

        // InterfaceIndex (4 bytes)
        int ifIndex = bb.getInt();

        // Capability (4 bytes)
        int capability = bb.getInt();

        // Reserved (4 bytes) - skip
        bb.getInt();

        // LinkSpeed (8 bytes) - in bits per second
        long linkSpeedBps = bb.getLong();

    assertEquals("c", Iterables.getLast(list));
  }

  public void testGetLast_emptyList() {
    List<String> list = emptyList();
    assertThrows(NoSuchElementException.class, () -> Iterables.getLast(list));
  }

  public void testGetLast_sortedSet() {
    SortedSet<String> sortedSet = ImmutableSortedSet.of("b", "c", "a");
    assertEquals("c", Iterables.getLast(sortedSet));
  }

        @SuppressWarnings("unchecked")
        ArrayMap<String, String> copy = (ArrayMap<String, String>) SerializeUtil.serialize(map);
        assertThat(copy.getAt(0), is(nullValue()));
        assertThat(copy.getAt(1), is("test"));
        assertThat(copy.getAt(2), is("test2"));
        assertThat(map.equals(copy), is(true));
    }

    /**
     * @throws Exception
     */
    @Test

                fessLogPath = "../../logs";
            }
            op.replace("fess.log.path", fessLogPath.replace("\\", "/"));
        }).asYouLikeIt(resource -> {
            final Host host = resource.getHost();
            if (host instanceof final StandardHost standardHost) {
                standardHost.setErrorReportValveClass(SuppressErrorReportValve.class.getName());
            }

    assertEquals("::1", HostAndPort.fromString("[::1]:80").requireBracketsForIPv6().getHost());
    // Non-bracketed non-IPv6 works fine.
    assertEquals("x", HostAndPort.fromString("x").requireBracketsForIPv6().getHost());
    assertEquals("x", HostAndPort.fromString("x:80").requireBracketsForIPv6().getHost());

    // Non-bracketed IPv6 fails.
    assertThrows(