out = transfer;
        } catch (IOException e) {
          if (transfer != null) {
            try {
              transfer.close();
            } catch (IOException closeException) {
              e.addSuppressed(closeException);
            }
          }
          temp.delete();
          throw e;
        }

        file = temp;
        memory = null;
      }
    }
  }

        TestIterator iterator = new TestIterator(null);
        iterator.close();

        verify(delegate).close();
    }

    @Test
    @DisplayName("Close propagates exception")
    void closeException() throws CIFSException {
        when(delegate.hasNext()).thenReturn(false);
        doThrow(new CIFSException("Close failed")).when(delegate).close();

        TestIterator iterator = new TestIterator(null);