EntryAttribute attrPWD = new DefaultServerAttribute( atCN, "test1", (String)null, "test2" );
entry.put( attrPWD );
assertTrue( entry.remove( atCN, strNullValue ) );
assertTrue( entry.remove( atCN, strValue1, strValue2 ) );
assertFalse( entry.containsAttribute( atCN ) );
entry.add( atCN, strValue1, strNullValue, strValue2 );
assertTrue( entry.remove( atCN, strNullValue ) );
assertEquals( 2, entry.get( atCN ).size() );
assertFalse( entry.contains( atCN, strNullValue ) );