Bug 182062 Define and provide Date/Time format value
DateTime type has been supported in BIRT. Now, there's a proposal on support Date/Time type in BIRT Report Designer. In order to enable end user setting the format of Date/Time type, please define and provide format value for both Date and Time.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/StyleHandleTest.java
* Test null style. 1.Create new style. 2.Let Label binds with this style
	 * 3.Delete style. 4.Set style in label to null 5.Test if style information
	 * exists in design file or not. The expected result is no information
	 * exists.
	 * 
	 * @throws Exception
	 */
	public void testSetNullStyle( ) throws Exception
	{
		designHandle.getStyles( ).drop( 0 );
		DesignElementHandle handle = designHandle.findElement( "My Label1" ); 
		handle.setProperty( IStyledElementModel.STYLE_PROP, null );
		assertNull( handle.getProperty( IStyledElementModel.STYLE_PROP ) );
	}
	/**
	 * Tests get properties from cell selector.
	 * 
	 * @throws Exception
	 */
	public void testGetCellSelectorProperty( ) throws Exception
	{
		openDesign( "CellSelectorTest.xml" ); 
		TableHandle table = (TableHandle) designHandle.findElement( "table1" ); 
		GroupHandle group = (GroupHandle) table.getGroups( ).get( 0 );
		RowHandle row = (RowHandle) group.getHeader( ).get( 0 );
		CellHandle cell = (CellHandle) row.getCells( ).get( 0 );
		assertEquals( DesignChoiceConstants.LINE_STYLE_DOUBLE, cell
				.getProperty( IStyleModel.BORDER_LEFT_STYLE_PROP ) );
	}
}