assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, -1, 4));

    assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, 0, 5));

    // nothing really to assert?
    assertSame(CharStreams.nullWriter(), CharStreams.nullWriter());
  }

  /**
   * Returns a reader wrapping the given reader that only reads half of the maximum number of

    assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, -1, 4));

    assertThrows(IndexOutOfBoundsException.class, () -> nullWriter.append(null, 0, 5));

    // nothing really to assert?
    assertSame(CharStreams.nullWriter(), CharStreams.nullWriter());
  }

  /**
   * Returns a reader wrapping the given reader that only reads half of the maximum number of