GuidedDTDRLPersistence { boolean validateMetadataCell(String c) { return (c != null) && (!c.trim().equals("")); }  static GuidedDTDRLPersistence getInstance(); String marshal(final GuidedDecisionTable52 originalDTable);  }
@Test public void testMetadataCellValue() { GuidedDTDRLPersistence p = new GuidedDTDRLPersistence(); assertFalse(p.validateMetadataCell(null)); assertFalse(p.validateMetadataCell((""))); assertFalse(p.validateMetadataCell((" "))); }